Abstract: An analog/digital audio converting apparatus enables listening to both digital and analog audio signals received from a digital receiving apparatus and analog audio signals input from an external source using the same receiver by providing a formatter capable of converting the analog audio signal into a digital audio signal with the digital broadcasting receiving apparatus.

Abstract: A multi-channel and multi-zone audio environment is provided. Various inventions are disclosed that allow playback devices on one or more networks to provide an effective multi-channel and a multi-zone audio environment using timing information. According to one example, timing information is used to coordinate playback devices connected over a low-latency network to provide audio along with a video display. In another example, timing information is used to coordinate playback devices connected over a mesh network to provide audio in one or more zones or zone groups.

Abstract: A high definition distributed sound system has a master control hub with multiple serially linkable zones each capable of handling multiple serial arrays of powered speakers and a Cat5 cable. Each zone has an audio input, an internal master level controller and multiple powered-speaker outputs. Each of the serial arrays of powered speakers are connected to a corresponding powered-speaker output by the Cat5 cable. All of the zones can be used and controlled independently of the others or any number of them can be serially linked and controlled by their preceding zones. Additional master control hubs can be serially linked in a single system. The system interconnections can be done with Cat5 cable using RJ45 connectors. A low idle current power amplifier circuit offers extremely low levels of quiescent current, allowing a large number of speakers to be connected in one system.

Abstract: Provided is a signal processing method which receives a plurality of reception signals and subtracts pseudo-echoes generated by a plurality of adaptive filters which input the reception signals, from a plurality of echoes generated by the reception signals, thereby reducing the echoes. The method delays two or more of the reception signals so as to generate delayed reception signals and inputs the reception signals and the delayed reception signals to the adaptive filters so as to generate pseudo-echoes.

Abstract: A headphone system includes a headphone, a sensor, and a processor. The headphone may provide sound from virtual speakers to a listener via a plurality of sound paths that are filtered with a plurality of filters. The sensor may sense an angular velocity of a movement of the listener. The processor may receive the angular velocity and may calculate delays in the plurality of sound paths and filter coefficients for the plurality of filters based on the angular velocity, and insert the calculated delays in the plurality of sound paths and adjust the plurality of filters with the calculated filter coefficients.

Abstract: In some examples, aspects of the present disclosure may include techniques for audio control of one or more multimedia objects. In one example, a method includes receiving an electronic document that includes a group of one or more multimedia objects capable of generating audio data. The method also includes registering a multimedia object of the group of one or more multimedia objects, wherein registering the multimedia object comprises storing a multimedia object identifier that identifies the multimedia object. The method further includes receiving audio data; and determining, by a computing device, a volume level of the audio data generated by the registered multimedia object based on one or more configuration parameters, wherein the one or more configuration parameters define one or more volume levels associated with the multimedia object identifier. The method also includes outputting, to an output device, the audio data at the determined volume level.

Abstract: An active vibration noise control device obtains error signals corresponding to a cancellation error between vibration noise and control sounds generated by multiple speakers, from microphone(s), and actively controls the vibration noise. A basic signal generating unit generates a basic signal based on a vibration noise frequency. An adaptive notch filter unit generates control signals provided to each of the multiple speakers by applying a filter coefficient to the basic signal. A reference signal generating unit generates a reference signal from the basic signal based on multiple transfer characteristics from the multiple speakers to the one or more microphones. A filter coefficient updating unit updates the filter coefficient used by the adaptive notch filter unit so as to minimize the error signals. A controlling unit changes amplitude of the control signals of the speakers based on a similarity between the transfer characteristics and characteristics of the vibration noise.

Abstract: This document discusses, among other things, a MIC audio noise filtering system configured to detect MIC audio noise at a pole of a four-pole audio jack using first and second comparators. The MIC audio noise detection system can include first and second comparators configured to compare a value of the pole to respective first and second thresholds and to provide an output indicative of the comparisons and a detection circuit configured to count changes in the output over a first period of time and to detect MIC audio noise at the pole of the four-pole audio jack using the count.

Abstract: Some demonstrative embodiments include devices, systems and methods of noise control. For example, a device may include a controller to control noise within a predefined noise-control zone, the controller is to receive a plurality of noise inputs representing acoustic noise at a plurality of predefined noise sensing locations, which are defined with respect to the predefined noise-control zone, to receive a plurality of residual-noise inputs representing acoustic residual-noise at a plurality of predefined residual-noise sensing locations, which are located within the predefined noise-control zone, to determine a noise control pattern, based on the plurality of noise inputs and the plurality of residual-noise inputs, and to output the noise control pattern to at least one acoustic transducer.

Abstract: Embodiments of the present invention disclose a wireless-enabled peripheral hub device. According to one embodiment, the hub device includes a communication module for wirelessly communicating with one of a plurality of mobile devices and a loudspeaker system configured to stream audio received from one of the mobile devices. Furthermore, the device housing includes a movable cover portion and an internal cavity area for storing an accessory input device for use with one of the plurality of mobile devices.

Abstract: An earphone includes a shell and a thermoacoustic chip. The shell defines a first space. The thermoacoustic chip is disposed in the space of the shell. The thermoacoustic chip includes a speaker and a capsule defining a second space to accommodate the speaker. The speaker includes a substrate, a sound wave generator, a first electrode and a second electrode. The first electrode and the second electrode are spaced from each other and electrically connected to the sound wave generator. The substrate includes a first surface and a second surface opposite to the first surface. The capsule has at least one through hole and at least two connectors. The sound wave generator is opposite to the at least one through hole. Two of the at least two connectors are electrically connected with the first electrode and the second electrode.

Abstract: A high-pass filter is configured to remove a low-pass filter component of a first channel audio signal and a low-pass filter component of a second channel audio signal. A control unit is configured to detect a wind noise magnitude based on at least one from among the first channel audio signal and the second channel audio signal, and to increase a cutoff frequency of the high-pass filter according to an increase in the wind noise magnitude thus detected. The control unit is configured to set the cutoff frequency of the high-pass filter to a predetermined minimum value fMIN when the wind noise magnitude thus detected is smaller than a predetermined minimum value, and to gradually increase the cutoff frequency when the wind noise magnitude becomes greater than the minimum value.

Abstract: In accordance with embodiments of the present disclosure, an apparatus for providing an output signal to an audio transducer may include an analog signal path portion, a digital-to-analog converter (DAC), and a control circuit. The analog signal path portion may have an audio input for receiving an analog input signal, an audio output for providing the output signal, and a selectable analog attenuation, and may be configured to generate the output signal based on the analog input signal and in conformity with the selectable analog attenuation. The DAC may have a selectable digital gain and may be configured to convert a digital audio input signal into the analog input signal in conformity with the selectable digital gain. The control circuit may be configured to select the selectable analog attenuation and select the selectable digital gain based on a magnitude of a signal indicative of the output signal.

Abstract: A mobile electronic device and a sound playback method thereof are provided. The mobile electronic device includes a sensor, a speaker, and a controller coupled to the sensor and the speaker. The sensor detects whether the speaker is blocked or not. When the speaker is blocked, the controller multiplies a sound signal by a transfer function and then outputs the multiplied sound signal. The speaker plays the sound signal outputted by the controller. The transfer function changes the direction in which the speaker plays the sound signal.

Abstract: When a first noise and second noise to be generated after the first noise are generated within a predetermined period, a noise reduction unit is controlled so as to execute a first noise reduction process for an audio signal in a period including the first noise and not to execute the first noise reduction process for an audio signal in a period including the second noise.

Abstract: Media data playback positioning method, such as audio data positioning, comprising a processor retrieving audio data from a memory, using a timer to time an extendable digit receiving period, receiving digits, generating a time value upon expiration of the extendable digit receiving period, and performing a playback operation on the media data based on the time value.

Abstract: An audio matrix decoder is provided for decoding input signals Lt and Rt into output signals Lout, Cout, Sout, and Rout. The decoder circuit includes a main signal path having a passive matrix decoder and a cross talk canceller configured to apply variable gain values to intermediate signals and to compute the output signals Lout, Cout, Sout, and Rout. The decoder also includes a control signal path having a passive matrix decoder and a linear equation solver. The linear equation solver is configured to compute the variable gain values based on the intermediate signals and the necessary condition that re-encoded values of the output signals Lout, Cout, Sout, and Rout are equal to the input signals Lt and Rt. The linear equation solver is also configured to feed the variable gain values to the cross talk canceller for use in computing the output signals.

Abstract: A system and methods for providing a wireless earplug system are described. An earplug includes a wireless receiver/transmitter, a battery, a speaker, a sound canal and an on/off switch. The system also includes a controller including a wireless receiver/transmitter used to transmit wireless signals to the earplug. The earplug receives the wireless signals from the controller and plays audio sounds through the speaker and into the user's ear canal, thus enabling the user to hear the transmitted audio signals while ambient noises are blocked. The controller is also used to control the parameters of the time, duration and type of audio sounds.

Abstract: An audio signal receiving device, an audio signal adapter device and a system for transmitting an audio signal are provided. The audio signal adapter device is connected with an audio signal sending device and the audio signal receiving device and is configured to transmit a signal between the audio signal sending device and the audio signal receiving device, and the device comprises: a loudspeaker interface having an audio pin, a ground pin and a MIC pin; and a adapter end interface having an audio signal pin, a reference signal pin and a ground pin. The audio signal pin of the adapter end interface is connected with the audio pin of the loudspeaker interface, the reference signal pin of the adapter end interface is connected with the ground pin of the loudspeaker interface, for sending the audio signal output from the audio signal sending device to the audio signal receiving device.

Abstract: In a vehicle equipped with a vehicle sound system, determining a virtual fixed gear ratio; determining a virtual RPM based on the virtual fixed gear ratio; generating a set of harmonic signals based on the virtual RPM, the harmonic signals being sine-wave signals proportional to harmonics of the virtual RPM; processing the harmonic signals to produce a set of processed harmonic signals; and in the vehicle sound system, transducing the processed harmonic signals to acoustic energy thereby to produce an engine sound within a passenger cabin of the vehicle.