Abstract: An audio system includes a first audio device and a second audio device. A communications link connects the first and second audio devices together so that each may communicate with the other. The system includes an audio volume manager that varies the audio output level of the second audio device as a function of the perceived loudness of the second audio device as perceived at the first audio device.

Abstract: Systems and methods are described by which microphones comprising a mechanical filter can be accurately calibrated to each other in both amplitude and phase.

Abstract: A headset having remote controls for a multimedia playback device is provided. The headset is electrically connected to an audio playback device and includes a jack plug for coupling the headset to the audio playback device; a body having a left and a right speaker unit and a microphone that is connected to the jack plug through a cable, and a remote control circuit that is interposed between the jack plug and the body, generating control signals for controlling the audio playback device. The headset is implemented with a remote control circuit on a signal link connecting the headset and a mobile phone, thereby improving portability of the mobile phone and user convenience in controlling the audio playback related function of the mobile phone.

Abstract: A method of combining at least two audio signals for generating an enhanced system output signal is described.

Abstract: An apparatus, method and a computer program are provided. The apparatus is configured to process an electrical output signal from a loudspeaker to detect a user input signal.

Abstract: A system for processing sound, the system including: (a) a processor, configured to process a first input signal that is detected by a first microphone at a detection moment, a second input signal that is detected by a second microphone at the detection moment, and a third input signal that is detected by a bone-conduction microphone at the detection moment, to generate a corrected signal that is responsive to the first, second, and third input signals; and (b) a communication interface, configured to provide the corrected signal to an external system.

Abstract: Disclosed is a system and method with independent adjustment of on and off-axis tonality and a system and method for modeling an idealized off-axis polar response of a directional microphone. The system can include two or more microphone capsules arranged in close proximity within a single housing and a filtering algorithm applied to the output of each microphone capsule that results in a signal that has a predominantly idealized on and off-axis user selectable polar pattern responses and user selectable microphone modeling which models the on-axis frequency response of a physical or virtual microphone. Optionally, the system and method can compensate for the on and off-axis polar response changes due to low-frequency proximity-effect.

Abstract: The present invention relates to a condenser microphone assembly comprising a capacitive electro-acoustic transducer element comprising a diaphragm and a back-plate operatively connected to a DC bias voltage, a fast charge pump adapted to generate the DC bias voltage, and a controllable or programmable current source operatively connected to the DC bias voltage to draw a predetermined DC current there from. The controllable or programmable current source is responsive to a difference between a representative of a detected DC bias voltage and a DC reference voltage.

Abstract: A waterproof pillow with audio unit is described. The waterproof pillow with audio unit includes a waterproof pillow, a sound unit and a remote control unit. Either the sound unit scans a plurality of audio devices for identifying the audio devices or the audio devices respectively scan the sound unit for identifying the sound unit to establish the communication links between the sound unit and audio devices. The sound unit then utilizes a switch unit to switch for selecting one of the audio devices. An audio output device is used to output the audio output of the selected audio device. The remote control unit controls the sound unit for selecting the musical sound of the audio devices served as the audio output. The remote control unit further adjusts the volume of the audio output.

Abstract: A driving circuit for a sound outputting apparatus includes a H-bridge and a charge pump established by six switches for driving two types of loudspeakers, respectively. The six switches include two common switches to be configured in the H-bridge and the charge pump, thereby reducing the costs and circuit area of the driving circuit.

Abstract: A method and apparatus for providing an audio signal for an event at a venue are disclosed. For example, the method authorizes a customer endpoint device, wherein the authorizing enables the customer endpoint device to decode the audio signal for the event. The method transmits the audio signal for the event at the venue.

Abstract: A standalone, earhook style headset interface and control apparatus that plugs into and engages a micro audio player, particularly, a micro MP3 player, used as an integral part of an ear supported, recorded audio device player or headphone. The earhook headphone system combines player controls, speaker and speaker controls, and headphone jack to plug in a second headphone for stereo listening of programmed audio while securing the MP3 player on, behind or about the ear during vigorous activity. An auxiliary jack also functions as the programming and recharging interface for the audio player device. A selector control switch for single/duplex single ear channel listening is located on the housing. A spring tail earhook of flexible soft silicone material, functions as the gripping and stabilizing element of the earhook headset, securing the unit behind or near the ear. All control functions of the audio player are integrated into the earhook headset.

Abstract: A system and method that automatically disables and/or enables an acoustic beamformer is described herein. The system and method automatically generates an output audio signal by applying beamforming to a plurality of audio signals produced by an array of microphones when it is determined that such beamforming is working effectively and generates the output audio signal based on an audio signal produced by a designated microphone within the array of microphones when it is determined that the beamforming is not working effectively. Depending upon the implementation, the determination of whether the beamforming is working effectively may be based upon a measure of distortion associated with the beamformer response, an estimated level of reverberation, and/or the rate at which a computed look direction used to control the beamformer changes.

Abstract: Certain aspects of the present disclosure relate to a method for speeding up the Cadzow iterative denoising algorithm as a part of the Finite Rate of Innovation (FRI) processing and for decreasing its computational complexity.

Abstract: An apparatus for processing an audio input signal is provided and includes an audio processing circuit and an audio compressing circuit. The audio processing circuit receives the audio input signal, and enhances a first frequency part of the audio input signal to output a bass-enhancement signal. The audio compressing circuit is coupled to the audio processing circuit, and reduces a gain of a second frequency part of the bass-enhancement signal to output an audio output signal.

Abstract: The specification and drawings present a new method, apparatus and software product for calibrating multiple microphones (e.g., a microphone array) to match their sensitivity using an ambient noise by creating and updating one or more calibration signal level difference histograms.

Abstract: Systems and methods described herein provide for low latency active noise cancellation, which alleviates the problems associated with analog filter circuitry. The present technology utilizes low latency digital signal processing techniques that overcome the high latency conventionally associated with conversion between the analog and digital domains. As a result, low latency active noise cancellation is performed utilizing digital filter circuitry which is not subject to the inaccuracies and drift of analog filter components. In doing so, the present technology provides robust, high quality active noise cancellation.

Abstract: A mobile communication device that may be used by an investigator to secretly record a suspect and track the investigator's location includes a microphone for detecting sounds, a communication component for transmitting signals or data representative of the sounds to one of the portable computers via the wireless communication network, a display for displaying information related to operation of the device, a computing device, and a computer program implemented by the computing device. The computer program is operable to place the device in a stealth mode in which the display is turned off or otherwise deactivated to make the entire device appear to be turned off while the microphone continues to detect sounds and the communication component continues to transmit signals or data representative of the sounds to a surveillance or support team operating one of the portable computers.

Abstract: In accordance with some embodiments of the present invention there is provided a system, a method and a circuit for processing a stereo audio signal. According to some embodiments, the system for processing a stereo audio signal may include an audio processing circuit. The audio processing module or circuit may be operatively connected to an audio input interface and to an output audio interface. Through the audio input interface, the audio processing circuit may be adapted for receiving a 2-channels stereo audio signal. The audio processing module may be adapted for determining an output mono audio signal representing the center sound and a stereo audio signal representing the stereo sound without the center. Through the output interface the audio processing circuit may provide each of an output mono audio signal representing the center sound and a stereo audio signal representing the stereo sound without the center.

Abstract: The present disclosure provides an audio signal amplifying circuit for an electronic device including a processing chip and a speaker. The audio signal amplifying circuit includes an amplifying circuit and an inverting circuit connected to the processing chip to get a first control signal and invert the first control signal to generate a second control signal. The first control signal and/or the second control signal are used to control the operation mode of the amplifying circuit to be in an amplifying mode or in a non-amplifying mode.