Abstract: Embodiments of the present disclosure provide an earphone debugging method and device, and a storage medium. The earphone debugging method comprises the following steps: obtaining configuration parameters to be updated of a slave earphone and configuration parameters to be updated of a master earphone by the master earphone; sending, by the master earphone, the configuration parameters to be updated of the slave earphone to the slave earphone, which allows the slave earphone to be operated according to the configuration parameters to be updated of the slave earphone; and the master earphone being operated according to the configuration parameters to be updated of the master earphone. According to the embodiments of the present disclosure, the earphone debugging efficiency is improved.

Abstract: An audio synchronization playback method includes: obtaining, by the primary playback device, target audio data; sending, by the primary playback device, the target audio data to at least one secondary playback device for playback; synchronizing, by the primary playback device, local time of the primary playback device with local time of the reference clock device based on a target audio synchronization signal in response to receiving the target audio synchronization signal and obtaining, by the primary playback device, reference playback timestamp of the target audio synchronization signal; where the target audio synchronization signal is a periodic signal sent by the reference clock device, and the reference clock device is the primary playback device or one secondary playback device of the preset quantity of secondary playback devices; and starting, by the primary playback device, playback from a target audio data frame corresponding to the reference playback timestamp.

Abstract: A computerized method for facilitating execution of an interactive live game by a processor of a game server, is provided. The method includes receiving a request of a player to participate in an interactive live game; executing an interactive game; based on the executed game, transmitting, to a video processor, game display data and virtual reality data, the virtual reality data including data pertaining a virtual reality environment comprising at least two themes. Based on the executed game, transmitting game events, thereby facilitating the player's device to create a composited video stream comprising a live game video stream captured in a live studio in which an operator operating a mobile activation button, and data that pertains to the generated game events. In response to receiving an input from the mobile activation button, game server transmits transition data indicative of switching between the at least two themes in the environment.

Abstract: A method for pairing and controlling multiple loudspeaker systems within a network. The network includes multiple control units, each having Bluetooth and RF chipsets, an MCU, and at least one transceiver. One control unit, the master unit, is operatively connected to a first loudspeaker system. A second control unit, the slave unit, is operatively connected to a second loudspeaker system. The master unit generates and records an IV key. The IV key and master unit identifying information are transmitted to, and recorded by, the slave unit. The IV key is then used to initiate communication between the master and slave units. Slave unit identifying information is transmitted to, and recorded by, the master unit. The master unit then transmits digital data to the slave unit, which relays the data to the second loudspeaker system. The first and second loudspeaker systems then simultaneously perform a task associated with the digital data.

Abstract: Various arrangements for performing wireless device-to-device communication are presented. An audio output device, such as an earbud or pair of earbuds, can establish a connection with an audio source via a first Bluetooth interface that communicates using a Bluetooth communication protocol on a 2.4 GHz Bluetooth frequency band. The audio output device can negotiate that Bluetooth frequency-shifted communication, such as on a 5 or 6 GHz frequency band, is available for use with the audio source. The audio output device may then perform Bluetooth frequency-shifted communication with the audio source such that the audio output device receives an audio stream from the audio source using Bluetooth frequency-shifted communication and the Bluetooth communication protocol.

Abstract: A method and a device for performing synchronization detection on wireless earphones, wireless earphones and a computer readable storage medium are provided. In the method, a synchronization state between a left earphone and a right earphone of the wireless earphones is acquired when the wireless earphones trigger a target action, where the target action includes any one of: entering a box, leaving a box, entering an ear, leaving an ear and connecting to a terminal; a countdown with a predetermined time duration is started in a case that the synchronization state is a non-synchronous state; and the synchronization state between the left earphone and the right earphone of the wireless earphones is acquired when the countdown ends.

Abstract: Individual loudspeaker dynamics processing configuration data, for each of a plurality of loudspeakers of a listening environment, may be obtained. Listening environment dynamics processing configuration data may be determined, based on the individual loudspeaker dynamics processing configuration data. Dynamics processing may be performed on received audio data based on the listening environment dynamics processing configuration data, to generate processed audio data. The processed audio data may be rendered for reproduction via a set of loudspeakers that includes at least some of the plurality of loudspeakers, to produce rendered audio signals. The rendered audio signals may be provided to, and reproduced by, the set of loudspeakers.

Abstract: The present disclosure relates to circuitry for detecting connection of a plug of an audio accessory device to a socket of an intermediate cable that is connected to a host device, wherein the plug of the accessory device is of a different type than the socket of the intermediate cable. The circuitry comprises a monitoring unit comprising a first terminal configured to be electrically connected to a first socket contact of the socket that is in electrical contact with a first plug contact of the plug when the plug is fully received in the socket; and a second terminal configured to be electrically connected to a second socket contact of the socket that is in electrical contact with a second plug contact of the plug when the plug is fully received in the socket.

Abstract: A communication protocol provides improved communication performance between a wireless stereo headset (12) and a host device (19). The communication protocol provides communication paths between the host device (19) and each ear piece (12a, 12b) of the wireless stereo headset (12), as well as a communication path between the two ear pieces (12a, 12b) of the wireless stereo headset (12). In addition to receiving audio information from the host device (19), each ear piece (12a, 12b) may request audio information from the other ear piece (12b, 12a), thus obtaining path diversity. Using special control messages on connection between the ear pieces (12a, 12b), the ear pieces (12a, 12b) inform each other which audio information has been received successfully from the host device (19).

Abstract: Systems and methods for automatically adjusting device volume based on learned volume preferences are disclosed herein. A first device receives a wireless signal from a second device. A signal strength of the wireless signal is determined, and a location of the second device is determined based on the signal strength of the wireless signal. Historical volume level data for the first device is retrieved from memory. A target volume level for the first device is determined based on the location of the second device and the historical volume level data. A volume setting of the first device is automatically adjusted to the target volume level.

Abstract: The present invention includes: a voice sensor for detecting voice information; a camera for capturing an image of a subject related to the voice information; and a control unit for controlling the camera such that the image of the subject related to the voice information is captured when the voice sensor detects the voice information, and determining, by using the captured image of the subject and the voice information, whether the subject related to the voice information is a counterfeit face, thereby determining whether to execute a control command corresponding to the voice information.

Abstract: An audio rendering device includes: at least one wireless communications interface configured to receive a first plurality of audio packets from a wireless communication device, the first plurality of audio packets including frames of audio data for a first audio channel from a set of one or more audio channels; and a processing unit; wherein the audio rendering device is configured to release, at respective first buffer release times, the frames of the audio data for the first audio channel from a first buffer for rendering by the processing unit; wherein the audio rendering device is configured to receive one or more messages from an other audio rendering device; and wherein the audio rendering device is configured to synchronize the first buffer release times with second buffer release times associated with the other audio rendering device based on the received one or more messages.

Abstract: A audio playback control method includes: triggering switching audio of media content played on a terminal to a first audio playback device for playback in response to a distance between the terminal and the first audio playback device reaching a communicable distance for near field communication during a process of playing the media content on the terminal; and switching the audio of the media content played on the first audio playback device to a second audio playback device for playback in response to the second audio playback device being triggered to play the media content during a process of playing the media content on the first audio playback device.

Abstract: An example method of operation may include detecting an acoustic stimulus via active beams associated with at least one microphone disposed in a defined space, detecting loudspeaker characteristic information of at least one loudspeaker providing the acoustic stimulus, transmitting acoustic stimulus information based on the acoustic stimulus to a central controller, and modifying, via a central controller, at least one control function associated with the at least one microphone and the at least one loudspeaker to minimize acoustic feedback produced by the loudspeaker.

Abstract: In general, the subject matter described in this disclosure can be embodied in methods, systems, and program products for identifying that a first audio stream includes first, second, and third sources of audio. A computing system identifies that a second audio stream includes the first, second, and third sources of audio. The computing system determines that the first and second sources of audio are part of a first conversation. The computing system generates a third audio stream that combines the first source of audio from the first audio stream, the first source of audio from the second audio stream, the second source of audio from the first audio stream, and the second source of audio from the second audio stream, and diminishes the third source of audio from the first audio stream, and the third source of audio from the second audio stream.

Abstract: A speaker controller includes a switch that is inserted on a speaker wiring for supplying a sound signal to a speaker. A switch control circuit can extract and hold an ON/OFF control signal for instructing ON/OFF of the switch from an alternating-current signal supplied via the speaker wiring. A switch control circuit controls ON/OFF of the switch based on the ON/OFF control signal. A power supply circuit can generate a power supply voltage for operating the switch control circuit from the alternating-current signal supplied via the speaker wiring.

Abstract: An apparatus for spatial audio signal decoding including at least one processor and at least one memory including a computer program code configured to cause the apparatus at least to: receive at least one associated audio signal, the at least one associated audio signal based on a spatial audio signal; spatial metadata associated with the at least one associated audio signal, the spatial metadata including at least one parameter representing an ambiance energy distribution of the spatial audio signal and at least one directional parameter representing directional information of the spatial audio signal; synthesize from the at least one associated audio signal at least one output audio signal based on the at least one directional parameter and the least one parameter, wherein the at least one parameter controls ambiance energy distribution of the at least one output signal.

Abstract: A headphone system including a headphone in wireless communication with a remote-controller to be used in combination for direct communication between a first-user and a second-user. The remote-controller remotely controls functions of the headphone to interrupt a current audio output of the headphone being delivered from an audio-delivering-device. The remote-controller includes an integrated microphone and receive an audio message. Audio from the microphone is effectively instantly delivered to at least one speaker of the headphones via a wireless channel.

Abstract: An earphone-switching method in a mobile terminal are disclosed. The mobile terminal is currently connected with a first earphone, and the method includes performing an earphone-switching operation in response to the mobile terminal being in a call state and an earphone-switching condition being met, the earphone-switching operation being configured for switching the first earphone to a second earphone; detecting whether at least one of a first voice data and a second voice data is obtained during the earphone-switching operation; and sending the at least one of the first voice data and the second voice data, in response to the at least one of the first voice data and the second voice data being obtained, wherein the first voice data is sent to the second earphone, and the second voice data is sent to the peer terminal.

Abstract: Methods, systems, and media for controlling audio output are provided. In some implementations, a method for controlling audio output is provided, the method comprising: receiving, by a computing device, audio content to be presented; determining that an output port of the computing device is connected to a corresponding connector; providing the audio content at the output port; recording a first portion of audio using a microphone; determining that the audio content is present in the first portion of audio; continuing to provide the audio content at the output port; recording a second portion of audio using the microphone; determining that the audio content is not present in the second portion of audio; and presenting the audio content using a speaker of the computing device.

Abstract: Systems and methods are provided for distributing audio. An audio system is provided that includes one or more audio interfaces, at least one of which is a wireless audio interface. An audio hub couples to the one or more audio interfaces and detects the presence of one or more headphones coupled to the wireless audio interfaces. The audio hub selectively establishes communication channel(s) to convey audio content between a plurality of devices coupled to the audio interfaces. The plurality of devices may include one or more headphones, an infotainment head unit, a microphone, and a speaker. Accordingly, headphone users may hold conversations with each other and/or other occupants of a vehicle, and various users may share audio content with headphone users and/or other occupants of a vehicle.

Abstract: Provided is a part display apparatus. The part display apparatus includes: a tab display unit configured to display a plurality of tabs respectively corresponding to a plurality of part groups; a digest information display unit configured to display, in each tab of the plurality of tabs, digest information of each part of the part group corresponding to that tab; a tab selection reception unit configured to receive selection of any one of the plurality of tabs; and a detailed information display unit configured to display a part detail screen including detailed information of the part group corresponding to the selected tab.

Abstract: One example may include a method that includes receiving, at a presentation server, an audio data signal from a mobile device located in a presentation space, identifying a mobile device identification characteristic of the mobile device based on the received audio data signal, determining a mobile device location via a location determination procedure, and playing the audio signal via a loudspeaker.

Abstract: A system that determines that devices are co-located in an acoustic region and selects a single device to which to send incoming notifications for the acoustic region. The system may group devices into separate acoustic regions based on selection data that selects between similar audio data received from multiple devices. The system may select the best device for each acoustic region based on a frequency that the device was selected previously, input/output capabilities of the device, a proximity to a user, or the like. The system may send a notification to a single device in each of the acoustic regions so that a user receives a single notification instead of multiple unsynchronized notifications. The system may also determine that acoustic regions are associated with different locations and select acoustic regions to which to send a notification based on location.

Abstract: A system for facilitating configuration of an audio system tests the existing audio system configuration by playing reference audio clips of various different genres of programming, the audio of which is received by a microphone of a remote control device or other handheld mobile device at various different listening points in the room. The system then compares the audio signal representing audio of the reference audio clip received at the microphone to a reference audio signal representing the reference audio clip and determines other audio characteristics. The system then determines, based on the comparison and other characteristics of the room (e.g., furniture layout, room construction materials, wall treatments and current speaker positioning) suggested changes to a configuration of the audio system to increase audio quality of the audio system for playing audio associated with the various different genres of programming.

Abstract: Coordinating signal processing among computing devices in a voice-driven computing environment is provided. A first and second digital assistant can detect an input audio signal, perform a signal quality check, and provide indications that the first and second digital assistants are operational to process the input audio signal. A system can select the first digital assistant for further processing. The system can receive, from the first digital assistant, data packets including a command. The system can generate, for a network connected device selected from a plurality of network connected devices, an action data structure based on the data packets, and transmit the action data structure to the selected network connected device.

Abstract: In general, the subject matter described in this disclosure can be embodied in methods, systems, and program products for identifying that a first audio stream includes first, second, and third sources of audio. A computing system identifies that a second audio stream includes the first, second, and third sources of audio. The computing system determines that the first and second sources of audio are part of a first conversation. The computing system generates a third audio stream that combines the first source of audio from the first audio stream, the first source of audio from the second audio stream, the second source of audio from the first audio stream, and the second source of audio from the second audio stream, and diminishes the third source of audio from the first audio stream, and the third source of audio from the second audio stream.

Abstract: Certain examples described herein relate to a removable unit of an additive manufacturing system. The removable unit is connectable to a base unit. When connected and operational, the base unit supplies a first voltage to the removable unit via a first power coupling. The removable unit has a power supply unit that converts the first voltage to a second voltage. The second voltage may power a number of low voltage components. The removable unit also has a power multiplexer. When the first voltage is unavailable the removable unit switches the power multiplexer to use a second voltage that is supplied from the base unit via a second power coupling.

Abstract: An audio communication system is disclosed. The audio communication system comprises a speaker device having at least one speaker, a first wireless communication unit and a first connector part; a dongle having control functionality, a second wireless communication unit, and a second connector part, the dangle being configured to operate in a first mode being an audio communication system pairing mode and in a second mode being an audio communication system operating mode. The second connector part is in the audio communication system pairing mode configured to interconnect with the first connector part to enable pairing of the dongle and the speaker device. The second connector part is the audio communication system operating mode configured to interconnect with an external device, providing wireless communication between the speaker device and the external device.

Abstract: An audio device comprises a display unit which displays information, a screen information storage unit which stores screen information of a predetermined application, an acceptance unit which accepts a selection of an application, a selection information storage unit which stores selection information of the application accepted by the acceptance unit, an audio device communication unit which sends the application selection information to the portable terminal and receives information according to the application selection information, and a screen display control unit which, upon receiving information according to the application selection information from the audio device communication unit, displays on the display unit a screen using the screen information stored in the screen information storage unit based on the application selection information stored in the selection information storage unit.

Abstract: Described herein are modular speaker systems including a plurality of wireless speaker modules configured to output sound in a first arrangement and in a second arrangement, in which the first arrangement is different from the second arrangement. In the first arrangement, at least one speaker module can be in physical contact with at least one other speaker module. In the second arrangement, the at least one speaker module can be physically separated from the at least one other speaker module. The plurality of wireless speaker modules may be arranged in any orientation with respect to one another.

Abstract: A hearing system comprises a hearing device, e.g.

Abstract: In some implementations, a system can be configured to manage groups of playback devices. For example, playback devices can be dynamically grouped in a variety of ways. Each playback device can store attributes that define the group to which the playback device belongs. Each playback device can send its group attributes to remote control devices and the remote control devices can determine groups of playback devices based on the group attributes. The remote control devices can then configure and present graphical user interfaces that represent the various groups of playback devices. In some implementations, a group of playback devices can be configured as a persistent group. For example, a pair of playback devices (e.g., wireless speakers) can store and send attribute data indicating that the pair of playback devices is a persistent group so that remote control devices can present and control the persistent group as a single device.

Abstract: Methods, systems, and media for controlling audio output are provided. In some implementations, a method for controlling audio output is provided, the method comprising: receiving, by a computing device, audio content to be presented; determining that an output port of the computing device is connected to a corresponding connector; providing the audio content at the output port; recording a first portion of audio using a microphone; determining that the audio content is present in the first portion of audio; continuing to provide the audio content at the output port; recording a second portion of audio using the microphone; determining that the audio content is not present in the second portion of audio; and presenting the audio content using a speaker of the computing device.

Abstract: A method of locating a microphone, a device of locating a microphone and a system of locating a microphone. The method includes: determining an initial position of the microphone located in front of a light outgoing surface of a display screen; determining a target position of the microphone; determining a first displacement of the microphone in a direction perpendicular to the light outgoing surface of the display screen based on the target position and the initial position; determining a second displacement of the microphone in a direction parallel with the light outgoing surface of the display screen based on the target position and the initial position; and controlling the microphone to move to the target position based on the first displacement and the second displacement.

Abstract: A display device including a display; a first external device interface configured to receive an image signal and an audio signal output from a first external input device; a second external device interface configured to receive an image signal and an audio signal output from a second external input device; and a controller configured to display a graphic user interface including a first external input item describing at least one of the first external device interface and the first external input device connected to the display device via the first external device interface, a second external input item describing at least one of the second external device interface and the second external input device connected to the display device via the first external device interface, a first audio output menu for selecting at least one of a plurality of audio output devices for outputting audio included in the audio signal received from the first external input device, and a second audio output menu for selecting at

Abstract: In general, the subject matter described in this disclosure can be embodied in methods, systems, and program products for identifying that a first audio stream includes first, second, and third sources of audio. A computing system identifies that a second audio stream includes the first, second, and third sources of audio. The computing system determines that the first and second sources of audio are part of a first conversation. The computing system generates a third audio stream that combines the first source of audio from the first audio stream, the first source of audio from the second audio stream, the second source of audio from the first audio stream, and the second source of audio from the second audio stream, and diminishes the third source of audio from the first audio stream, and the third source of audio from the second audio stream.

Abstract: Technology for grouping, consolidating, and pairing individual playback devices with network capability (players) to stimulate a multi-channel listening environment is disclosed. An example method includes receiving an audio signal containing a range of audio frequencies; amplifying, according to a gain parameter, the audio signal to be reproduced by at least one speaker. The example method includes automatically increasing the gain parameter to a higher gain parameter responsive to a determination that no more than a subset of the range of audio frequencies is to be reproduced by the at least one speaker. The example method includes amplifying, according to the higher gain parameter, the audio signal containing no more than the subset of the range of audio frequencies to be reproduced by the at least one speaker.

Abstract: Technology for grouping, consolidating, and pairing individual playback devices with network capability (players) to stimulate a multi-channel listening environment is disclosed. An example method includes receiving an audio signal containing a range of audio frequencies; amplifying, according to a gain parameter, the audio signal to be reproduced by at least one speaker. The example method includes automatically increasing the gain parameter to a higher gain parameter responsive to a determination that no more than a subset of the range of audio frequencies is to be reproduced by the at least one speaker. The example method includes amplifying, according to the higher gain parameter, the audio signal containing no more than the subset of the range of audio frequencies to be reproduced by the at least one speaker.

Abstract: Technology for grouping, consolidating, and pairing individual playback devices with network capability (players) to stimulate a multi-channel listening environment is disclosed. An example method includes receiving an audio signal containing a range of audio frequencies; amplifying, according to a gain parameter, the audio signal to be reproduced by at least one speaker. The example method includes automatically increasing the gain parameter to a higher gain parameter responsive to a determination that no more than a subset of the range of audio frequencies is to be reproduced by the at least one speaker. The example method includes amplifying, according to the higher gain parameter, the audio signal containing no more than the subset of the range of audio frequencies to be reproduced by the at least one speaker.

Abstract: There may be provided a system that may include a processor and an audio hub; wherein the audio hub may include first communication interfaces, a second communication interface, a processor, and a memory; wherein the first communication interfaces may be configured to exchange audio signals with a group of audio components of different types; wherein an aggregate number of first communication interface bits exceeds a number of second communication interface bits; wherein the audio signals may include input audio signals received from the group and output audio signals transmitted to the group; wherein the processor may be configured to generate an input multiplex of input audio signals; and wherein the second communication interface may be configured to transmit the input multiplex to the processor and to receive an output multiplex from the processor.

Abstract: This specification describes a method comprising determining whether an estimated position of an audio capture device which captures audio data is within boundaries of a predetermined area, and in response to a determination that the estimated position is not within the boundaries of the predetermined area, associating the captured audio data with an adjusted position.

Abstract: A method and apparatus are disclosed to recreate directional cues and in a conventional beamformed monophonic audio signal. In an example embodiment, the apparatus captures sound in an environment via the microphone array which includes a left reference and a right reference microphone. A monophonic audio signal is generated using conventional beamforming methods. A conventional monophonic beamformed signal lacks directional cues which may be useful for multiple output channels. By applying the phase offset data of the audio signals at the left and right reference microphones, directional cues may be created for audio signals for the left and right output channels respectively.

Abstract: A codec operable to process audio data and related data. The codec further operable to receive at least one of an audio, audio auxiliary, program configuration, and data signals from a program source, the audio signals including at least one of single channel audio and multi-channel audio signals, audio auxiliary signals including spatial and motion data and environmental characteristics, the data signals including program related data. The codec further operable to generate a non-transitory encoded bitstream, wherein the bitstream includes at least one of synchronization command data and at least one of a program command data, audio channel data, audio auxiliary data, program content data, and an end of stream data, wherein the encoded bitstream includes an identifier for defining packet type for each data component. The synchronization command data includes a stream start flag defining an entry point for decoding the bitstream and further provides sample rate for the encoded bitstream.

Abstract: A user device can be used to correct for a latency of a speaker. The user device can communicate an indication to the speaker to play a sound at a first time. The user device can record a second time at which a microphone on the user device detects the sound. The first and second times can be synchronized to a clock of a computer network. The user device can compare the first and second times to determine a latency of the speaker. The user device can communicate adjustment data corresponding to the determined latency to the speaker. The speaker can use the adjustment data to correct for the determined latency. In some examples, the user device can display instructions to position the user device a specified distance from the speaker, and can account for a time-of-flight of sound to propagate along the specified distance.

Abstract: An audio system is disclosed that contains speakers that are configured to transmit unique parameters to an audio source. The system includes a hub that is configured to be connected with one or more audio sources. At least one speaker is included having one or more filter parameters stored internally that are specific to the speaker. The speaker is operable to transmit the one or more filter parameters to the hub. The hub is operable to use the one or more filter parameters to filter an audio channel associated with the speaker and an associated subwoofer channel.

Abstract: Disclosed herein is a sound reproduction system configured to emit a first sound and a second sound from a loudspeaker at a time. The first sound is intended to reach ears of an object person's. The second sound is intended to reach ears of a non-object person's and compliant with a control characteristic. The control characteristic is defined such that the second sound includes a component which is emitted from the loudspeaker toward a first region occupied by the object person and has a sound pressure lower than a predetermined value, and another component which is emitted from the loudspeaker toward a second region occupied by the non-object person and has a sound pressure equal to the predetermined value.

Abstract: An example method includes, based on an adjustment to a first displayed volume control, instructing the first playback device to adjust playback volume level; based on an adjustment to a second displayed volume control, instructing the second playback device to adjust playback volume level; after sending the commands, instructing the first and/or second playback device to process an audio stream into a first and/or second channel and to reproduce a respective one of the first and second channel, wherein the grouped first and second playback devices provide multi-channel sound; and based on an adjustment to a third displayed volume control, instructing the first and/or second playback device to adjust a group volume level for both the first and second playback devices.

Abstract: A method for processing audio data includes: setting a first queue for managing at least one configured information control node of audio data to be played and a second queue for managing at least one configured information control node of played audio data, wherein each of the at least one configured information control node contains attribute information for the audio data to be played; unchaining a unit of the at least one configured information control node from the first queue; reading audio data to be played corresponding to the unit of the at least one configured information control node according to the attribute information for the audio data to be played in the unit of the at least one configured information control node; and chaining the unit of the at least one configured information control node to the second queue.

Abstract: Apparatus and methods for multi-source audio amplification and ear protection devices are provided herein. In certain configurations, an audio amplification and ear protection device includes at least one microphone that generates an ambient sound signal based on detecting ambient sound, at least one speaker, and an electrical system that controls sound outputted by the at least one speaker based on amplifying the ambient sound signal and a secondary sound source signal. The electrical system receives a first user-controlled volume signal that is operable to control an amount of amplification provided to the ambient sound signal, and a second user-controlled volume signal that is operable to control an amount of amplification provided to the secondary sound source signal.