Abstract: An apparatus includes a printed wiring board (PWB) that defines an aperture. A microphone is mounted on the PWB such that the aperture provides an acoustic path to the microphone. An acoustic interface member defines a cavity that is acoustically coupled to the microphone via the aperture. A first gasket between the printed wiring board and the acoustic interface member forms an acoustic seal. A housing is included, and a second gasket is disposed between the acoustic interface member and the housing to form an acoustic seal. An acoustic chamber is defined by a sealed volume that extends from a first (bottom/inner) surface of the housing down to a junction between the microphone and the PWB. The housing defines apertures which provide an acoustic path between a region external to the housing and the acoustic chamber. The acoustic chamber and the apertures in the housing form a Helmholtz resonator.

Abstract: In the present invention, a digital electroacoustic transducer apparatus with a noise canceling system includes: a signal processing circuit that generates a digital processing signal based on a digital signal from a sound source; a first voice coil that receives the digital processing signal; a microphone that picks up noise and generates a noise signal; a noise canceling circuit that generates a cancel signal based on the noise signal; and a second voice coil that receives the cancel signal, the first voice coil and the second voice coil driving a diaphragm, thereby avoiding a difference between the phase of the cancel signal and the phase opposite to that of noise.

Abstract: The present disclosure relates to a microphone driving device and a digital microphone including the same. A microphone driving device according to an embodiment of the inventive concept includes a voltage-to-current converter, a current-to-voltage converter, an analog-to-digital converter, a digital amplification unit, and a gain controller. The voltage-to-current converter converts an acoustic signal to an output current signal based on a gain control signal. The current-to-voltage converter converts the output current signal to an amplified voltage signal. The analog-to-digital converter converts the amplified voltage signal to a digital signal. The digital amplification unit amplifies the digital signal to an amplified digital signal based on the gain control signal. The gain controller generates a gain control signal. The microphone driving device and the digital microphone including the same according to the inventive concept may have a wide dynamic range and reduce the influence of noise.

Abstract: A method of reducing power consumed by an audio playback system includes: receiving a signal from a digital audio interface; comparing a sound pressure level (SPL) response of a first frequency band of the signal to a total SPL response of the signal, the first frequency band including frequencies lower than a selected frequency; and attenuating signal components in the first frequency band of the signal based upon the comparison of the SPL response of the first frequency band of the signal to the total SPL response of the signal.

Abstract: Embodiments of the disclosure generally include a method and apparatus for receiving and separating unwanted external noise from an audible input received from an audible source using an audible signal processing system that contains a plurality of audible signal sensing devices that are arranged and configured to detect an audible signal that is received from any position or angle within three dimensional space. The audible signal processing system is configured to analyze the received audible signals using a first signal processing technique that is able to separate unwanted low frequency range noise from the received audible signal and a second signal processing technique that is able to separate unwanted higher frequency range noise from the received audible signal. The audible signal processing system can then combine the signals processed by the first and second signal processing techniques to form a desired audible signal that has a high signal-to-noise ratio throughout the full speech range.

Abstract: A first lifetime estimate is determined for a first acoustic component of a first audio playback device configured with first signal processing settings. A second audio playback device is configured with second signal processing settings. A second lifetime estimate is determined for a second acoustic component of the second audio playback device configured with the second signal processing settings, where the second lifetime estimate is determined based on first lifetime estimate and where the first acoustic component is substantially similar to the second acoustic component.

Abstract: A method for calibrating a microphone that includes a transducer element and an ASIC. The method includes calibrating the frequency characteristic of the ASIC such that the sensitivity (Smic(fLLF)) of the microphone at a predetermined cutoff frequency (fLLF) shows a predefined reduction (?) compared to the sensitivity (Smic(fstandard)) of the microphone at a standard frequency (fstandard). Another aspect of the present invention concerns a microphone.

Abstract: Embodiments of the present application disclose a method and an apparatus for obtaining vibration information and user equipment.

Abstract: A microphone apparatus including a MEMS transducer, an acoustic activity detector, a local oscillator, and an external-device interface standardized for compatibility with devices from different manufacturers is disclosed. The microphone apparatus has a first mode of operation during which the apparatus is clocked by the internal clock signal when the acoustic activity detector processes digital data for acoustic activity, and a second mode of operation during which the microphone apparatus is clocked by an external clock signal received at the external-device interface after voice activity is detected by the acoustic activity detector.

Abstract: A pin-covering apparatus applied to a plurality of pins of an emitting end of a bi-directional optical module comprises a plurality of mediums and a plurality of metal sleeves. The mediums respectively cover the pins. The metal sleeves cover the mediums by taking the pins as centers, respectively. The metal sleeves are disposed at the emitting end of the bi-directional optical module. A bi-directional optical device using the pin-covering apparatus is also disclosed.

Abstract: A hearing device adapted for use by a wearer comprises an audio streaming circuit configured to receive electromagnetic audio streaming via a first communication link. A configuration circuit is configured to receive configuration parameters via a second communication link different from the first communication link for configuring the hearing device to receive the electromagnetic audio streaming. Control circuitry of the hearing device configures the hearing device to enable reception of the electromagnetic audio streaming in accordance with the received configuration parameters.

Abstract: In order to adjust an electric device, it is proposed to integrate a programmable memory unit into the device and to address said programmable memory unit without enlarging the footprint, via contact areas that are obtained by dividing previous contact areas. In this case, an adjustment value in particular for compensating for a fault tolerance is fed into the memory unit, an operating parameter being readjusted with the aid of said adjustment value. In each case two divided contact areas are short-circuited via a common soldering location during the mounting of the device.

Abstract: An audio signal processing device includes a sound acquisition unit configured to acquire audio data generated by collecting a sound in a sound collection target space, a selection unit configured to select, based on a priority of each of a plurality of areas in the sound collection target space, one or more of the areas in the sound collection target space, and an output unit configured to output processed data, for which predetermined signal processing for the areas selected by the selection unit is executed on the audio data acquired by the sound acquisition unit, and the predetermined signal processing for an area not selected by the selection unit is not executed on the audio data.

Abstract: An element substrate includes a substrate including a supply port configured to supply liquid, and a discharge port forming member including a discharge port configured to discharge the liquid supplied from the supply port. The discharge port forming member includes a liquid flow path communicating between the discharge port and the supply port on a surface opposed to a surface where the discharge port is provided. The discharge port forming member includes thick film portions and thin film portions in a region where the liquid flow path is formed. The thick film portions are lined up in a first direction so as to sandwich the discharge port therebetween and thicker than an adjacent portion adjacent to the discharge port. The thin film portions are lined up in a second direction intersecting with the first direction so as to sandwich the discharge port therebetween and thinner than the adjacent portion.

Abstract: Providing security features in an audio sensor is presented herein. A micro-electro-mechanical system (MEMS) microphone can include an acoustic membrane that converts an acoustic signal into an electrical signal; an electronic amplifier that increases an amplitude of the electrical signal to generate an amplified signal; and switch(es) configured to prevent propagation of a direct current (DC) voltage source to the MEMS microphone; prevent propagation of the DC voltage source to the electronic amplifier; prevent propagation of the electrical signal to the electronic amplifier; and/or prevent propagation of the amplified signal to an external device.

Abstract: A unidirectional condenser microphone unit includes a unit case that includes a diaphragm that vibrates upon receiving a sound wave, a fixed electrode disposed to face the diaphragm, an insulating base that supports the fixed electrode to form a back air chamber between the insulating base and the fixed electrode and a fixed electrode leading terminal made of metal that is attached to the insulating base, and that leads a signal voltage generated at the fixed electrode, wherein the unit case is provided with a front acoustic terminal hole formed in a front side of the diaphragm and a rear acoustic terminal hole for communication with the back air chamber, wherein the unit case has a second air chamber different from the back air chamber and the fixed electrode leading terminal is provided with a communication path between the back air chamber and the second air chamber.

Abstract: Microphone arrays with automatic beam focusing may easily focus on disturbing sound sources. In order to prevent this unwanted behavior, a predefined control sound signal is replayed from a direction of a disturbing sound source. The microphone array detects the predefined control sound signal, determines the direction of replay and in response performs a re-configuration according to the control sound signal. The reconfiguration may comprise eliminating the direction from its scanning range or cancel a previously made elimination of a different direction.

Abstract: A disclosed power generating device includes: a first magnetostrictive bar; a second magnetostrictive bar extending alongside the first magnetostrictive bar; a joint member coupling the first magnetostrictive bar and the second magnetostrictive bars; and a coil group including a first coil wound around the first magnetostrictive bar and a second coil wound around the second magnetostrictive bar, wherein the first coil and the second coil are connected in series.

Abstract: Vehicle speaker systems described herein enable different people to simultaneously hear different sounds while traveling in the same vehicle (without using headphones). This revolutionary result is based on novel speaker configurations and uses. Some vehicle audio systems include a first speaker system located above a first seat of a vehicle and configured to emit a first sound based on a first audio file. Vehicle audio systems can also include a second speaker system coupled to the vehicle and configured to emit a second sound based on a second audio file that is unrelated to the first audio file while the first speaker system emits the first sound.

Abstract: A microphone assembly includes a capacitive MEMS transducer and a bias circuit having a DC output coupled to the transducer. The microphone assembly also includes a differential amplifier having a first input coupled to a first output of the transducer, the differential amplifier having a second input coupled to a second output of the transducer. The microphone assembly further includes a first impedance matching network and a second impedance matching network configured to balance a first capacitive load at the first input of the amplifier and a second capacitive load at the second input of the amplifier. Electrical signals applied by the transducer to the first and second inputs of the amplifier are matched or approximately matched in magnitude and 180 degrees or approximately 180 degrees out of phase with respect to each other.

Abstract: A microphone includes a head case and an arm that supports the head case. The head case includes a microphone unit and a light emitter. A proximal end portion of the arm includes a light emitter circuit that turns on the light emitter on the basis of potential information of a specific terminal. One end of the light emitter is connected to the light emitter circuit through a wire that passes through an inside of the arm. The other end of the light emitter is connected to the microphone unit in the head case. The light emitter circuit includes a switching element that switches on and off of light emitter. The specific terminal is connected to a control signal input side of the switching element.

Abstract: Method of manufacturing a transducer module, comprising the steps of: forming, on a substrate, a first MEMS transducer, in particular a gyroscope, and a second MEMS transducer, in particular an accelerometer, having a suspended membrane; forming, on the substrate, a conductive layer and defining the conductive layer in order to provide, simultaneously, at least one conductive strip electrically coupled to the first MEMS transducer and the membrane of the second MEMS transducer.

Abstract: A sound source identification apparatus includes a sound collection unit including a plurality of microphones, a sound source localization unit configured to localize a sound source on the basis of an acoustic signal collected by the sound collection unit, a sound source separation unit configured to perform separation of the sound source on the basis of the signal localized by the sound source localization unit, and a sound source identification unit configured to perform identification of a type of sound source on the basis of a result of the separation in the sound source separation unit, and a signal input to the sound source identification unit is a signal having a magnitude equal to or greater than a first threshold value which is a predetermined value.

Abstract: A speaker module is provided. The speaker module includes a housing, a speaker unit, and a modulating unit. The housing has a main segment and an extension segment connecting to the main segment and extending away from the main segment, the main segment and the extension segment communicate with each other and form a chamber. The speaker unit is disposed in the housing in a position that is relative to the main segment. The modulating unit is arranged to correspond to the extension segment and is positioned in the housing. The shape of a cross section of the modulating unit is compatible with the shape of a cross section of the extension segment, and a length between the speaker unit and the modulating unit along the chamber is greater than 0.

Abstract: Example aspects of the present disclosure are directed to providing tactile bass response by a user device. For instance, a first audio signal can be caused to be output by a first user device and a second user device. A playback delay can be determined between the output of the first audio signal by the first user device and the output of the first audio signal by the second user device. At a first time, the second user device can be caused to output a second audio signal. The first user device can be caused to execute a tactile bass response representation associated with the second audio signal, such that the tactile bass response is executed at a second time, the second time being determined based at least in part on the temporal delay.

Abstract: This application relates to circuitry for processing sense signals generated by MEMS capacitive transducers for compensating for distortion in such sense signals. The circuitry has a signal path between an input (204) for receiving the sense signal and an output (205) for outputting an output signal based on said sense signal. Compensation circuitry (206, 207) is configured to monitor the signal at a first point along the signal path and generate a correction signal (Scorr); and modify the signal at at least a second point along said signal path based on said correction signal. The correction signal is generated as a function of the value of the signal at the first point along the signal path so as to introduce compensation components into the output signal that compensate for distortion components in the sense signal. The first point in the signal path may be before or after the second point in the signal path.

Abstract: The present invention discloses a speaker device and electronic equipment. The speaker device comprises a speaker body, an audio signal input terminal connected with the speaker body, and a DC voltage signal input terminal connected with the speaker body. The electronic equipment comprises the speaker device and a DC voltage signal output circuit. The present invention further discloses a method for reducing a low frequency distortion degree of the speaker of the electronic equipment, and the method is realized by additionally providing a DC voltage signal to the input end of the speaker. In the present invention, a distortion degree of the speaker device at a low-frequency working condition can be reduced, and inconsistency of low frequency distortion of the speaker device, caused by mass production, can be reduced.

Abstract: The present disclosure relates to an apparatus for preventing noise in an electronic device. An apparatus for preventing noise in an electronic device includes a microphone unit including a microphone, the microphone unit connected to a first power terminal and a second power terminal, and a switch unit including at least one switch and at least one resistance, the switch unit connected to the first power terminal and the microphone in series.

Abstract: The present invention provides a miniature loudspeaker, including a voice coil. The voice coil includes a voice coil body and four voice coil leads connected to the voice coil body. The voice coil body includes four corners, each of which is provided with a voice coil lead. The four voice coil leads are fixed to the frame and support the voice coil body. Each voice coil lead includes a first connecting portion connected to the voice coil body, a second connecting portion fixed to the frame, and a third connecting portion connecting the first connecting portion and the second connecting portion. The third connecting portion is wound into a helical structure.

Abstract: A microphone apparatus includes a microphone including first and second bi-directional microphone units having respective directional axes arranged on two straight lines passing through one point and radially extending with an interval of 120 degrees in a circumferential direction, and an omnidirectional microphone unit arranged in sound collection regions of the first and second bi-directional microphone units, and a signal synthesis unit that synthesizes at least one of respective non-inverted signals and inverted signals of the first and second bi-directional microphone units and an output signal of the omnidirectional microphone unit to generate a plurality of output signals having directional axes in mutually different directions.

Abstract: An apparatus for providing directional audio capture may include a processor and memory storing executable computer program code that cause the apparatus to at least perform operations including assigning at least one beam direction, among a plurality of beam directions, in which to direct directionality of an output signal of one or more microphones. The computer program code may further cause the apparatus to divide microphone signals of the microphones into selected frequency subbands wherein an analysis performed. The computer program code may further cause the apparatus to select at least one set of microphones of the apparatus for selected frequency subbands. The computer program code may further cause the apparatus to optimize the assigned at least one beam direction by adjusting a beamformer parameter(s) based on the selected set of microphones and at least one of the selected frequency subbands. Corresponding methods and computer program products are also provided.

Abstract: The invention is a filter circuit for noise cancelling earphones wherein one end of the filter circuit for noise cancelling earphones is connected to the circuit for noise cancelling microphones. In the circuit starting from one end of the said noise cancelling microphones circuit connected to the resistor R0 set the first current node. The other end of the said noise cancelling microphones circuit is connected to the ground while the other end of the said resistor R0 is connected to the high level.

Abstract: In some embodiments, a microphone system includes a multi-bit delta-sigma modulator configured to be coupled to a microphone and configured to covert an output of the microphone into a first digital signal with a multi-bit resolution at a first output of the multi-bit delta-sigma modulator. The microphone system also includes a digital noise shaper coupled to the first output of the multi-bit delta-sigma modulator, and configured to convert a multi-bit digital input of the digital noise shaper into a one-bit digital signal.

Abstract: A sound recording method and device are provided in the field of multimedia processing. The method is applied in a mobile terminal including three microphones, including: acquiring three channels of sound signals collected by the three microphones; calculating a central channel signal, a left channel signal, a right channel signal, a rear left channel signal and a rear right channel signal in a multi-channel surround audio system according to the three channels of sound signals; calculating a bass channel signal in the multi-channel surround audio system according to the three channels of sound signals; and combining the above signals to obtain a sound signal of the multi-channel surround audio system.

Abstract: A first lifetime estimate is determined for a first acoustic component of a first audio playback device configured with first signal processing settings. A second audio playback device is configured with second signal processing settings. A second lifetime estimate is determined for a second acoustic component of the second audio playback device configured with the second signal processing settings, where the second lifetime estimate is determined based on first lifetime estimate and where the first acoustic component is substantially similar to the second acoustic component.

Abstract: A host device for use with a removable peripheral apparatus having a microphone, and to the biasing circuitry for said microphone. The host device may have a device connector for forming a mating connection with a respective peripheral connector. A source of bias is arranged to supply an electrical bias to a device microphone contact of the device connector via a biasing path. A capacitor is connected between a reference voltage node and a capacitor node of the biasing path. A first switch is located between the capacitor node and the device microphone contact. Detection circuitry detects disconnection of the peripheral connector and device connector; and control circuitry controls the switch to disable the biasing path.

Abstract: Techniques described herein generally relate to generating an audio signal with a speaker. In some examples, a speaker device is described that includes a membrane and a shutter. The membrane can be configured to oscillate along a first directional path and at a first frequency effective to generate an ultrasonic acoustic signal. The shutter can be positioned about the membrane and configured to modulate the ultrasonic acoustic signal such that an audio signal can be generated.

Abstract: A MEMS microphone which is able to be set to different modes of operation is proposed that requires one single pin to apply an external clock frequency to the microphone. The applied clock frequency is selected according to a desired mode of operation and the microphone detects the applied frequency and sets the mode of operation.

Abstract: A speaker module is provided. The speaker module includes a housing, a speaker unit, and a modulating unit. The housing has a main segment and an extension segment connecting to the main segment and extending away from the main segment. The speaker unit is disposed in the housing in a position that is relative to the main segment. The modulating unit is relative to the extension segment and disposed in the housing. The shape of a cross section of the modulating unit is compatible with the shape of a cross section of the extension segment.

Abstract: Audio effects are played on ultrasonic (US) speakers mounted on a gimbal assembly. The audio effects channel demands an elevation, azimuth, and radial distance along which the audio effects are to be transmitted, and the gimbal assembly moves or a speaker is selected according to the audio effects channel. The demanded radial distance is established by altering the carrier frequency of the US sound.

Abstract: A MEMS microphone assembly includes a MEMS transducer element having a back plate and a diaphragm displaceable relative to the back plate. A bias voltage generator is adapted to provide a DC bias voltage applicable between the diaphragm and the back plate. An amplifier receives an electrical signal from the MEMS transducer element and provides an output signal. The amplifier is adapted to amplify the electrical signal from the MEMS transducer element according to an amplifier gain setting. A processor is adapted to carry out a calibration routine at power-on of the microphone assembly determining information regarding the DC bias voltage and/or the amplifier gain setting.

Abstract: Signal processing for an acoustic sensor bi-directional communication channel is presented herein. The acoustic sensor can comprise a micro-electro-mechanical system (MEMS) transducer configured to generate, based on an acoustic pressure, an audio output; and a bi-directional communication component configured to send and/or receive data that has been superimposed on the audio output using common mode signaling, time division multiplexing, or frequency separation. In an example, a signal processing component is configured to send the audio output directed to an external device utilizing differential mode signaling between respective pins of the acoustic sensor; and send the data utilizing the common mode signaling comprising a sum of voltages of the respective pins. In other examples, the signal processing component is configured to send and/or receive the data, and send the audio output, during different time periods; or send the data based on a frequency range outside an audio band.

Abstract: The low pressure plasma system includes a treatment chamber which is pumped out in a first process step by means of a pump. In a second process step a gas supply valve is opened in order to achieve a defined gas composition in the treatment chamber at low pressure. In a third process step a plasma generator is switched on in order to ignite a plasma in the treatment chamber. In a fourth process step a flushing valve can be opened in order to flush the treatment chamber. In a fifth process step the treatment chamber can be ventilated by way of a ventilation valve. The sequential switching element can be a rotary switch and include a zero switching position where the low pressure plasma system is off. The sequential switching element renders possible a simple embodiment of the low pressure plasma system and its intuitive operation.

Abstract: A loudspeaker system includes a driver in an enclosure that provides a back volume which is sealed with respect to acoustic pressure waves produced by a driver diaphragm. An external microphone is located outside the back volume. An internal microphone located inside the back volume. A computational unit is coupled to the external microphone and the internal microphone and configured to determine a transfer function for an equalization filter. The transfer function determination is responsive to the external microphone and the internal microphone. A digital signal processor is coupled to a signal source, the driver, and the computational unit. The digital signal processor is configured to implement the equalization filter as determined by the computational unit, create a filtered audio signal from the signal source, and provide the filtered audio signal to the driver.

Abstract: A system and method for providing assistive listening for a plurality of listeners in an environment including a plurality of acoustic sources. A microphone array in combination with an acoustic beamforming processor configured to receive the acoustic signals within the environment and to process the acoustic signals based upon a target location of an acoustic signal selected on a listener-controlled interface device to generate a steered beam pattern. The acoustic beamforming processor further configured to transmit the steered beam pattern to the listener-controlled interface device based on the target location selected. The listener-controlled interface device configured to provide the steered beam pattern to an ear-level transducer of a hearing-impaired listener.

Abstract: A programmable acoustic sensor is disclosed. The programmable acoustic sensor includes a MEMS transducer and a programmable circuitry coupled to the MEMS transducer. The programmable circuitry includes a power pin and a ground pin. The programmable acoustic sensor also includes a communication channel enabling data exchange between the programmable circuitry and a host system. One of the power pin and the ground pin can be utilized for data exchange.

Abstract: This application relates to circuitry for processing sense signals generated by MEMS capacitive transducers for compensating for distortion in such sense signals. The circuitry has a signal path between an input (204) for receiving the sense signal and an output (205) for outputting an output signal based on said sense signal. Compensation circuitry (206, 207) is configured to monitor the signal at a first point along the signal path and generate a correction signal (Scorr); and modify the signal at at least a second point along said signal path based on said correction signal. The correction signal is generated as a function of the value of the signal at the first point along the signal path so as to introduce compensation components into the output signal that compensate for distortion components in the sense signal. The first point in the signal path may be before or after the second point in the signal path.

Abstract: Provided is a microphone compatibility device comprising a sensor that detects a voltage along a conductive path between a microphone and at least one electronic device and a current control device that draws current for permitting microphone detection by each of a first electronic device and a second electronic device. The second electronic device has a lower current draw requirement than the first electronic device.

Abstract: Examples described herein involve validating motion of a microphone during calibration of a playback device. An example implementation involves receiving motion data indicating movement of a recording device while the recording device was recording a calibration sound emitted by one or more playback devices in a given environment during a calibration period. The example implementation also involves determining that sufficient vertical translation of the recording device occurred during the calibration period. The example implementation further involves determining that sufficient horizontal translation of the recording device occurred during the calibration period. The implementation involves sending, by the computing device to one or more playback devices, a message indicating that sufficient translation of the recording device occurred during the calibration period in vertical and horizontal directions.

Abstract: A digital sound system suitable for a digital speaker device to directly convert analog sound by a circuit using a ?? modulator and a mismatch shaping filter circuit to output a plurality of digital signals and a plurality of speakers driven by the plurality of digital signals. A digital speaker driving device includes a ?? modulator, a post filter, s driving circuits, and a power supply circuit to supply power to the ?? modulator, the post filter and the s driving elements, and the s driving circuits are adapted to s digital signal terminals.