A novel phantom-powered FET (field effect transistor) circuit for audio application is disclosed. In one embodiment of the invention, a novel phantom-powered FET preamplifier gain circuit can minimize undesirable sound distortions and reduce the cost of producing a conventional preamplifier gain circuit. Moreover, in one embodiment of the invention, one or more novel rounded-edge magnets may be placed close to a ribbon of a ribbon microphone, wherein the one or more novel rounded-edge magnets reduce or minimize reflected sound wave interferences with the vibration of the ribbon during an operation of the ribbon microphone. Furthermore, in one embodiment of the invention, a novel backwave chamber operatively connected to a backside of the ribbon can minimize acoustic pressure, anomalies in frequency responses, and undesirable phase cancellation and doubling effects.

A microphone apparatus including: a casing; a composite material located within the casing, the composite material including at least in part conductive particles, the composite material configured to alter an internal impedance based on a surface disturbance transmitted by an acoustic wave, and wherein the microphone apparatus is configured to be coupled to a surface that transmitted the acoustic wave.

An embodiment of the present disclosure provides a vibration sensing device, which may include a vibration sensor and at least one vibration component. The vibration sensor has a first resonant frequency, at least one vibration component may be configured to transmit the received vibration to the vibration sensor, and the at least one vibration component may include a liquid arranged in the target cavity and a plate body forming a part of the cavity wall of the target cavity. The at least one vibration component may provide at least one second resonant frequency for the vibration sensing device, and at least one second resonant frequency may be different from the first resonant frequency.

The embodiments of the present disclosure may disclose a vibration sensor, including: an acoustic transducer and a vibration assembly connected with the acoustic transducer. The vibration assembly may be configured to transmit an external vibration signal to the acoustic transducer to generate an electric signal, the vibration assembly includes one or more groups of vibration diaphragms and mass blocks, and the mass blocks may be physically connected with the vibration diaphragms. The vibration assembly may be configured to make a sensitivity degree of the vibration sensor greater than a sensitivity degree of the acoustic transducer in one or more target frequency bands.

A gaze direction of a user is determined by an eye-tracking system of a head mounted device. Audio data generated by at least one microphone is captured. Gaze-guided audio is generated from the audio data based on the gaze direction of the user.

A voice reception device includes a casing and at least two voice reception units. The casing includes a peripheral side wall, a bottom wall, a containing space formed in an inside of the peripheral side wall and the bottom wall, and a first opening end located at an end of the containing space. The voice reception units are disposed in the containing space. Each of the voice reception units includes a main body, a diaphragm, and a voice guiding channel. The main body has a chamber, and an end of the chamber has a second opening end. The diaphragm is connected to the second opening end of the main body. The voice guiding channel includes an importing end acoustically connected to the chamber and an exporting end opposite to the importing end and acoustically connected to a microphone.

An earphone includes a main body and a movable component. The main body accommodates a first built-in microphone and a second built-in microphone therein. The movable component accommodates a third built-in microphone therein. The movable component is movably disposed on the main body and has a stored position and a sticking out position. When the movable component is in the stored position, the main body activates the first built-in microphone and the second built-in microphone and deactivates the third built-in microphone. When the movable component is in the at least one sticking out position, the third built-in microphone is located relatively away from the main body, and the main body deactivates one of the first built-in microphone and the second built-in microphone and activates the third built-in microphone.

Electronic devices and methods of use include a plurality of microphones, a speaker, an audio module, and a processor electrically coupled to the plurality of microphones, the speaker, and the audio module. The processor may be configured to control the audio module to separate each of input signals of ambient sounds input respectively through the plurality of microphones into a plurality of frequency bands by frequency conversion, control the audio module to obtain a gain value for each of the plurality of frequency bands based on an inter-channel phase variance for the plurality of frequency bands, control the audio module to filter a first frequency band signal with a directionality based on the gain value for each of the plurality of frequency bands, and control the speaker to output an output signal processed based on the first frequency band signal.

A vibration sensor is designed to have a pressure-enhancing member, a pressure sensing device and first, second, third chambers. An air gap is designed to enable the first chamber to be vented to the third chamber such that the first chamber is combined with the third chamber to obtain a communicable air volume. An adhesive layer is formed between a spacer and a circuit board, and the air gap is formed in an adhesive-absent section between the spacer and the circuit board. When the pressure-enhancing member is moved to squeeze the air in the second chamber, a sensitivity of the pressure sensing device will be greatly improved.

A sound signal processing method includes receiving a sound signal, generating an early reflection sound control signal that reproduces an early reflection sound and a reverberant sound control signal that reproduces a reverberant sound from the sound signal, controlling a volume of the sound signal and distributing the sound signal to generate a direct sound control signal, and mixing the direct sound control signal, the early reflection sound control signal that reproduces a direct sound, and the reverberant sound control signal to generate an output signal.