Abstract: Embodiments include a method and an apparatus for the localization of at least one source of an acoustic signal including: temporally sampling the acoustic signal with a plurality of microphones to obtain a (D+1)-dimensional space-time matrix representation of the acoustic signal, wherein D is the number of spatial dimensions, applying a (D+1)-dimensional Fourier transform to the matrix representation, determining a first peak in a spectrum obtained based on the application of the Fourier transform, and calculating the direction of arrival of the acoustic signal at at least one of the plurality of microphones based on the determined first peak.

Abstract: Personal listening device (PLD) includes earphone housing having therein (a) inertial sensor to detect motion of PLD and to generate motion signal, (b) pressure sensor to detect compression of portion of PLD and to generate pressure sensor signal, and (c) speaker to receive anti-noise signal and desired audio signal from electronic device, and active noise control (ANC) system to generate anti-noise signal as being one of first or second anti-noise signal. ANC system includes processor, vibration detector to detect vibration of the PLD based on at least one of motion signal or pressure sensor signal, and ANC anti-noise generator to generate first anti-noise signal when vibrations are not detected by vibration detector, and to generate second anti-noise signal when vibrations are detected by vibration detector. Second anti-noise signal is based on detected vibrations. Processor reconfigures ANC system for ANC anti-noise generator to generate second anti-noise signal. Other embodiments are described.

Abstract: A sensing circuit includes: a follower transistor, having a control terminal; a follower terminal for connection to a load; a bias-current generator, coupled to the follower terminal; and a feedback stage, configured to control the bias-current generator as a function of an input signal on the control terminal of the follower transistor.

Abstract: To provide an effect circuit that can give round-shaped distortion effect to a music signal. An effect circuit 1 includes a input resistor R2 that is connected to a negative input terminal of an operational amplifier U1, a feedback resistor VR1 that is provided between a positive input terminal of the operational amplifier U1 and an output terminal of the operational amplifier U1, zener diodes D1 and D2 in each of which cathodes are connected and that are provided in parallel with the feedback resistor VR1, and diodes D3 and D4 that are connected in parallel so that each cathode and each anode are connected and are provided between cathodes of the zener diodes D1 and D2.

Abstract: The present technology substantially reduces undesirable effects of multi-level noise suppression processing by applying an adaptive signal equalization. A noise suppression system may apply different levels of noise suppression based on the (user-perceived) signal-to-noise-ratio (SNR) or based on an estimated echo return loss (ERL). The resulting high-frequency data attenuation may be counteracted by adapting the signal equalization. The present technology may be applied in both transmit and receive paths of communication devices. Intelligibility may particularly be improved under varying noise conditions, e.g., when a mobile device user is moving in and out of noisy environments.

Abstract: An electronic device may include a housing having an audio output port therein, a display carried by the housing, and an internal partition carried within the housing and defining a baffle space behind at least a portion of the display. The electronic device may also include an audio output transducer carried by the internal partition and acoustically coupled to the audio output port, and a passive radiator within the baffle space, acoustically coupled between the audio output transducer and the display, and acoustically isolated from the audio output port.

Abstract: An electronic device may include a housing having an audio output port therein, a display carried by the housing, and a baffle enclosure carried within the housing. The electronic device may also include an audio output transducer carried by the baffle enclosure and acoustically coupled to the audio output port, and internal partitions carried by the baffle enclosure to define a serpentine tuning port therein acoustically coupled between the audio output transducer and the display, and acoustically isolated from the audio output port.

Abstract: An audio content playback method for a portable terminal The audio content playback method includes checking a channel that is supportable by audio content that is currently engaged in group's simultaneous playback, in group's simultaneous playback of the audio content. The method includes allocating a channel to each of devices included in a group based on position information of each device included in the group or based on an input state in a user interface environment that is preset for channel allocation for each device included in the group, and transmitting the allocated channel information to each device included in the group to allow the device to select its allocated channel and play the audio content.

Abstract: A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone is also provided proximate the speaker to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit determines a degree of coupling between the user's ear and the transducer and adjusts the adaptive cancellation of the ambient sounds to prevent erroneous and possibly disruptive generation of the anti-noise signal if the degree of coupling lies either below or above a range of normal operating ear contact pressure.

Abstract: A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone is also provided proximate the speaker to measure the ambient sounds and transducer output near the transducer, thus providing an indication of the effectiveness of the noise canceling. A processing circuit uses the reference and/or error microphone, optionally along with a microphone provided for capturing near-end speech, to determine whether the ANC circuit is incorrectly adapting or may incorrectly adapt to the instant acoustic environment and/or whether the anti-noise signal may be incorrect and/or disruptive and then take action in the processing circuit to prevent or remedy such conditions.

Abstract: When an effect parameter of an effector is changed, if only a switching operation is provided to bypass the original audio signals, which are input signals of the effector, during the period required for making that change, the output sound level may drastically change before and after the switching causing one to feel a sense of discomfort. In order to eliminate such a drawback, a gain adjustment circuit is provided in a bypass channel that outputs the original audio signals by bypassing the effector. The gain adjustment circuit is controlled in accordance with a rate of the output signal level of the effector and the original audio signal level, and the output signal level of the bypass channel is adjusted thereby. Consequently, a fluctuation in the output sound level before and after switching of the output signals can be eliminated.

Abstract: An hearing protection device is provided. The hearing protection device can include a speaker to relay sounds, such as conversations, to the user of the hearing protection. The hearing protection device can include an electronics package that can filter out undesirable sounds, such as to improve the user's ability to hear conversations around them while still protecting the user's ears.

Abstract: An acoustic sensor system has an acoustic sensor with a cavity, a cavity leakage, and a cavity pressure. The acoustic sensor system further has a test controller coupled to the acoustic sensor that causes a change in the cavity pressure. A response of the acoustic sensor to the change in the cavity pressure is used to measure the cavity leakage.

Abstract: A personal audio device that detects speech provides for improved interaction with others. When speech is detected in a microphone output signal of a microphone that measures ambient audio sounds, the audio program being reproduced by the personal audio device may be altered, by attenuating, muting or interrupting the program material. The speech may be provided to a headset that reproduces the program material. The direction of the speech can be used to determine whether the speech is from a person other than the use of the personal audio device.

Abstract: A first earphone of an earphone system includes a first magnet assembly and a first voice coil. A second earphone of the earphone system includes a second magnet assembly and a second voice coil. The second magnet assembly has a magnetic polarity that is opposite to the first magnet assembly. The current direction in the second voice coil is reversed relative to the current direction in the first voice coil. The first earphone and the second earphone attract each other because of the opposite magnetic polarity between the first magnet assembly and the second magnet assembly.

Abstract: An ultrasonic emitter system includes a digital processing system for adjusting the amplitude of an ultrasonic carrier signal to increase audio levels of an audio signal during lower power portions of the audio signal. To increase the audio levels without introducing unwanted audio and/or distortion, an additive constant is added to the ultrasonic carrier signal based on a rolling average audio signal power measurement.

Abstract: A system and method are provided for automatic fitting of all audio signals according to the ear in which a user is using to receive audio signals from a host device. The host device incorporates an audio signal fitting device, which may comprise an inquirer configured to query the host device for an in-use audio producing transducer; an electronic mechanism configured to identify an ear which a user is using to receive audio signals from a host device, based on the in-use audio producing transducer; and a notifier configured to instruct the host device, based on the identified ear, to output a channel of audio signals to the in-use audio producing transducer. The ear in use may be deduced from inertial data.

Abstract: Various techniques for detecting are described herein. In one example, a method includes detecting a position of a computing device and selecting a plurality of microphones to detect audio data based on the position of the computing device. The method can also include calculating location data corresponding to the audio data, the location data indicating the location of a user and modifying a far field gain value based on the location data.

Abstract: A method of defining an acoustic channel in a vehicle or other environment involving providing a respective definition of in-vehicle sound sources, the definitions including a definition of a respective sound associated with each sound source and a respective location within the vehicle associated with each sound source. Segments corresponding to the sounds are identified in an output signal of a microphone located in the vehicle. Definitions of acoustic channels are generated from the output signal segments in respect of the location associated with the respective sound source. The sounds relate to intrinsic parts of the vehicle, for example a door closing or a windshield wiper operating. A map of acoustic channels is maintained and used to compensate audio signals for distortion caused by a relevant acoustic channel. The acoustic map can be updated while the vehicle is driving in response to detection of sounds from the sound sources.

Abstract: A sound diverter for use with an electronic device which has one or more speakers, wherein the sound diverter is operably connected to the device enhancing the sound emitted from the speaker.