Abstract: One embodiment provides a method comprising determining an energy stored in a port of a vented box loudspeaker based on a physical model of the vented box loudspeaker, determining a time-varying attenuation to apply to a source signal for reproduction via the vented box loudspeaker based on the energy stored in the port, and controlling the energy stored in the port in real-time by attenuating the source signal based on the time-varying attenuation. A velocity of air in the port during the reproduction of the source signal is limited based on the controlling.

Abstract: Dynamic loudness equalization of received audio content in a playback system, using metadata that includes instantaneous loudness values for the audio content. A playback level is derived from a user volume setting of the playback system, and is compared with a mixing level that is assigned to the audio content. Parameters are computed, that define an equalization filter that is filtering the audio content before driving a speaker with the filtered audio content, based on the instantaneous loudness values and the comparing of the playback level with the assigned mixing level. Other embodiments are also described and claimed.

Abstract: An entertainment system includes an audio transmission device, for example a digital television. configured to provide audio signals over multiple channels. The entertainment system also includes an audio receiving device, for example over-the-ear or wireless headphones, configured to receive signals from the audio transmission device. The audio receiving device includes a sensor. When the sensor is in a first position the audio receiving device receives the signals from the audio transmission device. Correspondingly, when the sensor is in a second position, the audio receiving device does not receive the signals from the audio transmission device.

Abstract: The audio signal processing apparatus includes a processor configured to adjust an output loudness level of an input content. The processor is configured to obtain a loudness information analyzed from the input content, obtain a loudness gain applied to the input content based on the loudness information and a target loudness level, and adjust the output loudness level of the input content based on the loudness gain. In this case, in a first section among an entire section in which the input content is reproduced, the loudness gain is limited based on a first gain allowable range, and in a second section following the first section, the limitation on the loudness gain is released.

Abstract: Disclosed is a digital signal processing device including a digital filter unit for performing a filtering process on a signal inputted to the digital signal processing device on the basis of a filter coefficient set by a control device, a maximum allowable amplitude estimation unit for estimating a maximum allowable amplitude value allowable by the digital signal processing device in a system including the digital signal processing device, by using an impulse response of the digital filter unit, and a restart request unit for making a request of the control device for a restart of the digital signal processing device when the amplitude value of a signal to be outputted from the digital signal processing device is equal to or greater than the maximum allowable amplitude value or when the amplitude value exceeds the maximum allowable amplitude value.

Abstract: An audio device includes: a processor configured to perform signal processing on the sound signal according to a value of a parameter; a display; a plurality of operating elements; a controller configured to: change the value of the parameter in accordance with an operation performed through any one of the plurality of operating elements; cause the display to display the value of the parameter; and write the value of the parameter in the current memory; and a detector. The controller is configured to: execute a first routine, which is uninterruptable by another routine, when the detector detects the malfunction; and cause, in the first routine, the display to display a first message without newly storing the value of the parameter; and mute, in the first routine, the processed signal in accordance with an operation performed through any one of the plurality of operating elements.

Abstract: An audio signal processor includes a difference detecting circuit, a gain switching circuit, a differential gain value changing circuit, and a gain control circuit. The difference detecting circuit detects a differential gain value being a first total gain value being a gain value to be switched and a second total gain value being the gain value that has been switched. The gain switching circuit switches the first total gain value to the second total gain value. The differential gain value changing circuit decreases the differential gain value as time passes. The gain control circuit corrects an inputted signal with the differential gain value that decreases as time passes.

Abstract: Provided are an information processing device and an information processing method which are capable of obtaining sound volume correction effects more suitable for an auditory sensation. Target data which is a statistical value of metadata of each audio signal of an audio signal group is acquired, metadata of an audio signal to be reproduced is acquired, and either or both of a correction value of a sound volume of the audio signal to be reproduced and a correction value of a sound quality of the audio signal to be reproduced is calculated using the acquired target data and the acquired metadata.

Abstract: Example techniques may involve headphone interaction. An implementation may include while headphones are disconnected from a control device, the control device receiving an indication of particular audio content being played back by a first zone of the media playback system. While the particular audio content is being played back by the one or more playback devices of the media playback system, detecting that headphones have been connected to the first control device. Headphones may be connectable to the control device via either (a) an analog headphone jack or (b) a point-to-point personal area network connection. In response to detecting that the headphones are connected to the control device: the control device (i) causing the one or more playback devices of the first zone to stop playback of the particular audio content; (ii) retrieving the particular audio content and (iii) resuming playback of the particular audio content via the connected headphones.

Abstract: An electronic device includes a non-contact detection sensor and a controller that executes processing related to a timer in response to a gesture detected by the non-contact detection sensor.

Abstract: A device may receive a request associated with adjusting the media output level of a sink device that is configured to output media content. The device may identify a source gain of a source device that is configured to provide the media content to the sink device, and a sink gain of the sink device. The device may identify a sink adjustment value for changing the sink gain based on the request for adjusting the media output level of the sink device, the source gain, and the sink gain. The device may transmit, to the sink device, a control signal to permit the sink gain to be changed based on the sink adjustment value. The media output level of the sink device is based on the source gain and the sink gain.

Abstract: A sound system for a vehicle driven by an engine is provide, which includes an audio device for an internal space of a cabin of the vehicle, and a traveling state determiner configured to determine a traveling state of the vehicle. The audio device is configured to change a quality of a sound reproduced by a sound source and, when the traveling state determined by the traveling state determiner is a given traveling state, degrade the quality of the reproduced sound.

Abstract: An electronic device for controlling volume is described. The electronic device includes a processor. The electronic device also includes a memory in electronic communication with the processor. The electronic device further includes instructions stored in the memory. The instructions are executable by the processor to determine, from a set of volume settings, a number of volume settings within a threshold. The instructions are also executable by the processor to determine a volume adjustment factor based on the number of volume settings. The instructions are further executable by the processor to adjust each of the number of volume settings based on the volume adjustment factor.

Abstract: A line output converter (LOC) combined with a microprocessor to sense LOC output signal strength and respond to usefully high levels by generating a trigger to turn on an amplifier that is receiving the LOC output signal. A short, first predetermined time is programmed into the microcontroller as a minimum time to sense high signal levels before activating the amplifier, in order to suppress transient signals. A longer, second predetermined time is programmed into the microcontroller as a minimum time to sense low signal levels before deactivating the amplifier. The predetermined boundary between a high and a low signal level is also programmed into the microcontroller and, as with the predetermined times, is established responsive to the characteristics of the particular LOC involved. In an embodiment, the LOC is a compact adjustable LOC located on the same PCB as the microcontroller.

Abstract: A PDM (pulse density modulation) signal energy detection circuit includes a digital-to-analog converter circuit for receiving a PDM digital input signal and producing an analog output signal based on the PDM digital input signal. The PDM signal energy detection circuit also includes a comparator circuit for receiving the analog output signal from the digital-to-analog converter circuit and producing a pulsed signal when a magnitude of the analog output signal exceeds a pre-set threshold. The PDM signal energy detection circuit also has a counter circuit for receiving the pulsed signal from the comparator circuit and producing an energy detection signal when a number of consecutive pulsed signals exceed a pre-set count.

Abstract: The present disclosure provides a radio and method for automatically adjusting, in response to ambient noise, the volume setting of a radio. The radio comprises a microphone for receiving ambient audio and generating a microphone signal; a codec for receiving the microphone signal and generating a processor signal representative of the ambient audio; and processor circuitry operable to receive the processor signal, determine an ambient audio level in response to the processor signal, and determine an adjusted radio volume to generate a radio volume control signal, wherein the adjusted radio volume is determined by calculating a difference between a baseline volume level and ambient audio level and adding a current volume level setting, wherein the codec is also operable to receive the radio volume control signal and generate an output signal to adjust the radio volume setting to maintain a net difference between the adjusted radio volume and ambient audio.

Abstract: A method and system for locating a sound source are provide. The method may include detecting a sound signal of a sound by each of two audio sensors. The method may also include converting the sound signals detected by the two audio sensors from a time domain to a frequency domain. The method may further include determining a high frequency ratio of each of the sound signals in the frequency domain. The method may further include determining a direction of the sound source based on the high frequency ratios.

Abstract: A wireless microphone system efficiently combines a pair of antennas so that radio frequency (RF) signals may be transmitted to and from multiple receivers and multiple wireless microphones. The wireless microphone system supports a general radio access technology and may comply with a Digital Enhanced Cordless Telecommunications (DECT) specification. The resource manager combines a received RF component with a first digital component via a first coaxial link to a connected receiver. The receiver also combines a transmitted RF component with a second digital component via a second coaxial link to the resource manager. The first digital component further includes synchronization and data sub-components, which are separated at the receiver.

Abstract: Disclosed herein are embodiments for adjusting playback volume in a media playback system that utilizes a maximum volume feature. In one embodiment, when a playback device receives an instruction to change its playback volume to a requested volume level, the playback device will not necessarily set its playback volume state variable to the requested volume level, but rather will calculate a new (typically lower) alternate volume level based on the maximum volume state variable and instead set its playback volume state variable to that alternate volume level. Moreover, when a playback device shares certain of its state variables among the other devices of the media playback system, the playback device will not necessarily share its actual playback volume state variable, but rather will calculate a new (typically higher) representative volume level and instead share that representative volume level.

Abstract: A method for operating a gate driver circuit includes supplying power to the gate driver circuit from a power supply including a positive power supply voltage and a negative power supply voltage. The method also includes comparing the negative power supply voltage with a first voltage at an output terminal of a transistor, wherein the gate driver circuit is coupled to a gate terminal of the transistor. The method also includes operating the gate driver circuit when the negative power supply voltage is more negative than a trigger voltage, wherein the trigger voltage is a predetermined voltage above the first voltage. The method also includes deactivating at least a portion of the gate driver circuit when the negative power supply voltage is more positive than the trigger voltage.

Abstract: A method, a system, and a computer program product provide for changing a boundary between zones. This includes setting a location of a boundary which defines a part of a zone; detecting that an object moves into the zone across the boundary; and in response to the detection, changing the location of the boundary in a direction away from the object, compared to the location of the boundary before the change.

Abstract: A method, a system, and a computer program product provide for changing a boundary between zones. This includes setting a location of a boundary which defines a part of a zone; detecting that an object moves into the zone across the boundary; and in response to the detection, changing the location of the boundary in a direction away from the object, compared to the location of the boundary before the change.

Abstract: An external audio range indication system, for a vehicle, includes an audio system, a display device, and an electronic control unit. The audio system includes a plurality of speakers. The plurality of speakers is configured to output an audio content. The electronic control unit is operatively connected to the audio system and the display device. The electronic control unit includes a processor and a memory unit coupled to the processor. The memory unit stores logic that, when executed by the processor, causes the electronic control unit to determine an external audio range of the audio content output from the plurality of speakers, the external audio range being a range from the vehicle at which the audio content output from the plurality of speakers is audible by parties external to the vehicle, and control the display device to display the external audio range.

Abstract: Aspects of the disclosure are directed to processing signals including data exhibiting characteristics that facilitate assessment of transmission errors. As may be implemented in accordance with one or more embodiments, parameters are generated based signal transmission characteristics and are indicative of a different types of signal characteristics, including an amount of error correction that has been carried out on the signal. Two or more of the parameters are selected based on properties of signal disturbance under different reception conditions for the signal, and a degree of disturbance in the signal is predicted based on the selected parameters and signal conditions for the respective parameters at which the signal cannot be corrected. An output generated with the signal is then controlled, based on the predicted degree of disturbance and a threshold degree of disturbance.

Abstract: In at least one embodiment, an apparatus for generating a simulated vehicle sound is provided. At least one parameter module receives a first driver throttle signal and to transmit a first input signal indicative of a first simulated vehicle sound. An engine sound generator block audibly generates a first simulated vehicle sound in response to the first input signal. An engine sound removal block is operably coupled to a microphone that receives a first microphone input signal. The first microphone input signal includes first environmental noise associated with a vehicle exterior environment and the first simulated vehicle sound. The engine sound removal block is configured to filter the first simulated vehicle sound from the first microphone input signal to determine the first environmental noise. The engine sound generator generates a second simulated vehicle sound that is louder than the first environmental noise.

Abstract: A headset power management system provides robust and low-power operation by detecting various connection conditions by measuring a voltage at the microphone terminal with and without injection of current from the headset. A power management circuit controls an operating state of the headset using a microphone terminal voltage detector and can determine whether a short circuit is present indicating a connection to a device that does not have a microphone input, a negative polarity voltage is present indicating that the device may be determining a connection and type of the headset using the microphone terminal, a normal connection, or whether the headset is not connected to a device at all. Depending on the connection state, some or all of the headset electronics may be disabled until a normal connection is detected. For example the microphone processing circuits may be disabled if the connection does not support a microphone input.

Abstract: Brownout management for an audio amplification system. An audio amplification system includes audio volume control circuitry, audio sample interpolation circuitry, and brownout management circuitry. The brownout management circuitry includes brownout detection circuitry and brownout response circuitry. The brownout detection circuitry is configured to determine whether a voltage of a battery that powers the audio amplification system is below a brownout threshold, and to generate a brownout detection signal that indicates the voltage is below the brownout threshold. The brownout response circuitry is coupled to an audio output of the audio sample interpolation circuitry. The brownout response circuitry is configured to attenuate the audio samples output by the audio sample interpolation circuitry responsive to the brownout detection signal indicating that the voltage is below the brownout threshold.

Abstract: Systems and methods for isolating audio content and biometric authentication include receiving, with an audio receiver, an audio signal spanning a plurality of frequency bands, identifying a speech signal carried by a voice frequency band selected from the plurality of frequency bands, enhancing the speech signal relative to other audio content within the audio signal, and extracting a voice profile key that uniquely identifies the speech signal, wherein enhancing the first speech signal comprises adjusting attack and release times of the speech signal based on sound events within the speech signal, the attack time being associated with very high frequency sounds that are not phase-shifted.

Abstract: Techniques of playing back a looping video file involve providing multiple video codecs for decoding a video file. Each video codec performs its own decoding operation on the looping video file, resulting in multiple buffers of video frames and a buffer of audio frames. Then, as the GPU renders the ending video frames from a first buffer, it begins rendering the beginning video frames from a second buffer. In this way, the beginning of a next video cycle is already rendered for viewing by the time a current video cycle is ending.

Abstract: A system includes a processor, an audio display, and a haptic peripheral including a haptic output device. The audio display includes a speaker and a headphone connector. The haptic output device is configured to receive a control signal from the processor and output a haptic effect to the haptic peripheral in response to the control signal from the processor. The processor is configured to vary the control signal for the haptic output device depending on an audio output accessory connectivity status of the audio display such that the haptic output device generates and applies a first haptic effect if the audio display is connected to an audio output accessory in order to output audio through the headphone connector and the haptic output device generates and applies a second haptic effect if the audio display is not connected to an audio output accessory in order to output audio through the speaker.

Abstract: A system for cancelling objectionable wind noise in a vehicle cabin includes a wind noise identification module that is configured to receive data from a microphone indicating a noise measured in a cabin of a vehicle and determine whether the noise is objectionable wind noise based on (i) a position of a moveable panel configured to cover an opening in a body of the vehicle and (ii) at least one of an amplitude of the noise and a frequency of the noise. The system also includes a first noise cancellation module that is configured to generate a noise cancellation waveform to mitigate the noise based on at least one of the amplitude of the noise and the frequency of the noise when the noise is objectionable wind noise.

Abstract: A method for operating a hearing device, in particular a hearing aid device, in which a first analog signal is provided. A second analog signal is generated by a preamplifier based on the first analog signal, and a first digital signal is generated by an A/D converter based on the second analog signal. A second digital signal is generated by an amplifier based on the first digital signal, and a third digital signal, in which a noise is reduced in comparison with the second digital signal, is generated by a noise suppression unit based on a second digital signal. The preamplifier, amplifier, and noise suppression unit are set using a value characterizing the first digital signal.

Abstract: A recorded signal representing a recorded sound generated by a sound generation source is reproduced. A type of a sound generation source of a performance sound represented by a performance signal is specified. A sound volume of the recorded signal is reduced in a case where the sound generation source of the recorded signal corresponds to the specified type of the sound generation source.

Abstract: Methods, systems, and computer program products for normalizing the speaking volume of participants in meetings are provided herein.

Abstract: A sound source apparatus for receiving an audio signal and displaying the audio signal is provided. The sound source apparatus includes at least two sound source output devices, at least two distance sensors, and a processor. Each distance sensor is installed respectively corresponding to each sound source output device, and is configured to respectively detect at least one target to generate sensing signals. The processor receives the audio signal, and when the processor determines that the at least one target meets a sensing range through respectively receiving the sensing signals generated by each distance sensor, the processor calculates output volume of each sound source output device respectively according to a relative distance between each distance sensor and the at least one target.

Abstract: An apparatus for reducing cross-talk between transmitted audio signals and received audio in a headset. The headset includes one or more of a set of earphones, a headset frame, a microphone boom with an array of MEMS microphone configured to isolate the earphone audio from the microphone audio, a VOX circuit, low crosstalk cable(s), and/or other components. Sets of microphones may be enabled and/or disabled to reduce cross-talk between received audio signals and transmitted audio signals. The VOX circuit is configured to reduce cross-talk between received audio signals and transmitted audio signals.

Abstract: A predictive brownout prevention system may be configured to prevent brownout of an audio output signal. Particularly, the brownout prevention system may be configured to receive information indicative of adaptive estimates of power supply conditions, wherein the information indicative of adaptive estimates of the power supply conditions comprises information regarding a voltage component and a resistive component received from an adaptive battery model of a battery for providing electrical energy to a power supply for generating the power supply voltage and adapt the adaptive battery model based on a monitored battery voltage output by the battery and loading events of the signal path and excluding loading events of components other than the signal path which are powered from the battery.

Abstract: An electronic apparatus includes a plurality of sound output units. The electronic apparatus includes a detection unit for detecting an object around the electronic apparatus. The electronic apparatus includes a controller for controlling a signal to be output to the sound output unit based on a result of detection by the detection unit.

Abstract: A system, method, and apparatus for monitoring ambient sound and vibration levels at the location of a user allows a determination as to whether the user is exceeding a maximum allowed exposure time as determined by an occupational standard. The sound and vibration level data can be evaluated locally at the mobile communication device, as well as transmitted to a backend system to allow supervision of personnel associated with the backend system as a further assurance that personnel comply with exposure limits. Further, the mobile communication device, in response to ambient conditions, adjusts the settings of its alerting sound and the vibration level of an associated vibration accessory to ensure perception of alerts by the mobile communication device for the user of the mobile communication device.

Abstract: Systems, methods, software and apparatus that enable dynamic audio transducer control include obtaining attribute information relating to multiple communication nodes that are communication node group members. A group management system or other computing system receives attribute information from two or more of the communication nodes and determines settings for one or more audio transducers (e.g., speakers and microphones) in the group's communication nodes based on the attribute information. An audio transducer command is transmitted to or imposed on one or more of the nodes. Attribute information can include node attributes and/or changes to attributes. Audio transducer commands transmitted or otherwise imposed on nodes can include muting and unmuting commands, as well as setting volume levels and other audio settings associated with a node's operation.

Abstract: Brownout management for an audio amplification system. An audio amplification system includes audio volume control circuitry, audio sample interpolation circuitry, and brownout management circuitry. The brownout management circuitry includes brownout detection circuitry and brownout response circuitry. The brownout detection circuitry is configured to determine whether a voltage of a battery that powers the audio amplification system is below a brownout threshold, and to generate a brownout detection signal that indicates the voltage is below the brownout threshold. The brownout response circuitry is coupled to an audio output of the audio sample interpolation circuitry. The brownout response circuitry is configured to attenuate the audio samples output by the audio sample interpolation circuitry responsive to the brownout detection signal indicating that the voltage is below the brownout threshold.

Abstract: A mobile terminal and a control method thereof are disclosed. A mobile terminal according to an embodiment of the present invention comprises: a sound output unit which outputs a sound corresponding to reproduction of a content; a setting unit which includes a plurality of noise blocking levels and sets at least one noise blocking level on the basis of a user input; and a control unit which, when the content is reproduced, blocks surrounding noise according to the set noise blocking level and, when a specific event is detected, adjusts the already set noise blocking level such that the degree of surrounding noise blocking is changed according to the detected specific event.

Abstract: An audio headset comprising at least one headset earpiece comprising a speaker, an ear cushion adapter, a microprocessor and a driver; and a removable ear cup configured to be removably attached to the headset ear piece; wherein the microprocessor is configured to recognize the removable ear cup and adjust audio output through the speaker based on parameters associated with the removable ear cup.

Abstract: An electronic device is to be worn by a user and includes an antenna and a storage compartment that stores the antenna. In a state of the electronic device being worn by the user, the storage compartment is positioned at a side of the user's head. The antenna is capable of selectively adopting a stored state and a deployed state, the antenna being stored in the storage compartment in the stored state, and a greater portion of the antenna being separated from the storage compartment in the deployed state than in the stored state.

Abstract: A method may include receiving information indicative of an amplitude of an audio output signal, receiving information indicative of a predicted voltage of a power supply of a signal path having an audio input for receiving an audio input signal and an audio output for generating the audio output signal based on the audio input signal, predicting from the information indicative of the amplitude of the audio output signal and the information indicative of the predicted voltage of the power supply whether the audio output signal will exceed an available supply voltage generated by the power supply, and responsive to determining the audio output signal will exceed the available supply voltage generated by the power supply, attenuating the audio input signal or a derivative thereof to reduce the amplitude of the audio output signal such that the audio output signal does not exceed the available supply voltage of the power supply.

Abstract: Systems and methods described herein modify audio content on an electronic device. Embodiments can be configured to detect a mode of the electronic device to determine whether the device is in a telephone mode; receive a speech signal from a speech source while the device is in the telephone mode; and process the speech signal to improve the perceived quality of the speech at a recipient when the electronic device is in a telephone mode; wherein processing the speech signal to improve the perceived quality of the speech comprises, decreasing the signal level of audio content outside of a determined frequency band relative to the signal level of the audio content within the determined frequency band; and wherein the determined frequency band is a frequency band associated a vocal range of the anticipated speech content. The method further includes adjusting high frequency sounds such as attack and release times of the speech signal based on sound events within the speech signal.

Abstract: A voice signal processing apparatus and a voice signal processing method are provided. A loudness of an input voice signal is detected to obtain a reference loudness. Reference loudness gains corresponding to frequency bands are calculated according to the reference loudness and wide dynamic range compression curves corresponding to the frequency bands. Loudnesses of filter signals of the frequency bands are adjusted according to the reference loudness gains of the frequency bands.

Abstract: According to an embodiment, a method of operating an acoustic device includes buffering, by a buffer circuit, a first electrical signal from an acoustic transducer to produce a second electrical signal, receiving a feedback signal at a supply circuit, and comparing the feedback signal to a first threshold. The feedback signal is based on the first electrical signal. The method further includes, based on comparing the feedback signal to the first threshold, switching between a first mode and a second mode, supplying a first supply voltage to the buffer circuit during the first mode, and supplying a second supply voltage to the buffer circuit during the second mode. The first supply voltage is different from the second supply voltage.

Abstract: A system includes a memory configured to store data associated with a service that is available. The system also includes a microphone associated with an acoustic space and configured to receive an audio input produced by a person. The system further includes a sensor located within the acoustic space and configured to detect vibrations produced by the person. The system includes a processor coupled to the memory, to the microphone, and to the sensor. The processor is configured to conditionally authorize execution of the service requested by the person, the service conditionally authorized based on the audio input and the vibrations.

Abstract: In accordance with embodiments of the present disclosure, a method for operating a playback path comprising a first dynamic range enhancement subsystem and a second dynamic range enhancement subsystem, wherein an audio signal generated by the first dynamic range enhancement subsystem is communicated to the second dynamic range enhancement subsystem, is provided.