The present disclosure provides a microphone including at least one acoustoelectric transducer and an acoustic structure. The acoustoelectric transducer is configured to convert a sound signal to an electrical signal. The acoustic structure includes a sound guiding tube and an acoustic cavity. The acoustic cavity is in acoustic communication with the acoustoelectric transducer, and is in acoustic communication with outside of the microphone through the sound guiding tube. The acoustic structure has a first resonance frequency, the acoustoelectric transducer has a second resonance frequency, and an absolute value of a difference between the first resonance frequency and the second resonance frequency is not less than 100 Hz. By disposing different acoustic structures, resonance peaks in different frequency ranges may be added to the microphone, which improves a sensitivity of the microphone near multiple resonance peaks, thereby improving a sensitivity of the microphone in the entire wide frequency band.

The present disclosure may provide a microphone. The microphone may include: a shell structure and a vibration pickup portion, wherein the vibration pickup portion may generate vibration in response to vibration of the shell structure; the vibration transmission portion may be configured to transmit the vibration generated by the vibration pickup portion; and an acoustic-electric conversion component configured to receive the vibration transmitted by the vibration transmission portion to generate an electrical signal, wherein the vibration transmission portion and at least a portion of vibration pickup portion may form a vacuum cavity, and the acoustic-electric conversion component may be located in the vacuum cavity.

A microphone system includes a microphone and a pre-amplification conditioning circuit configured within a housing and comprising a pair of matched JFETs configured in a differential pair with common-source configuration and, when biased, are operable to receive and amplify the differential microphone output signal. The microphone further includes a pair of BJTs configured as a complimentary feedback transistor pair with each of the pair of BJTs coupled in parallel to a corresponding one of the pair of matched JFETs, and a current sink coupled to the matched JFETs and corresponding emitter electrodes of the BJTs and operable to maintain a fixed total direct current through each of the matched JFETs and BJTs, which reduces the JFETs corresponding electrical load, reduces signal noise, and increases a maximum amplified microphone output signal level at the drains of the matched JFETs.

The present disclosure discloses an acoustic output apparatus including at least one acoustic driver, a controller, and a supporting structure. The at least one acoustic driver may be configured to output sounds through at least two sound guiding holes. The at least two sound guiding holes may include a first sound guiding hole and a second sound guiding hole. The controller may be configured to control a phase and an amplitude of the sounds generated by the at least one acoustic driver using a control signal such that the sounds output by the at least one acoustic driver through the first and second sound guiding holes have opposite phases. The supporting structure may be provided with a baffle and configured to support the at least one acoustic driver such that the first and second sound guiding holes are located on both sides of the baffle.

A headphone includes: a housing including a first aperture; a first driver unit disposed in the housing; a partition wall dividing an internal space of the housing into a first space and a second space, the first space communicating with an external space through the first aperture and containing the first driver unit; and a second driver unit attached to the partition wall.

A hearing aid includes a microphone, an electro-acoustic transducer, and a housing that supports the electro-acoustic transducer such that the housing and the electro-acoustic transducer together define a first acoustic volume and a second acoustic volume. The electro-acoustic transducer is arranged such that a first radiating surface of the transducer radiates acoustic energy into the front acoustic volume and such that a second radiating surface of the transducer radiates acoustic energy into the second acoustic volume. The hearing aid is configured such that the first and second acoustic volumes are acoustically coupled to the microphone when the hearing aid is worn. The housing supports an acoustic element that is acoustically coupled to the microphone and the second acoustic volume and is arranged such that acoustic energy radiated from the acoustic element sums with acoustic energy leaked from the first acoustic volume at the microphone so as to cancel each other.

An image capture device includes a housing having a pattern of apertures and a membrane assembly. The membrane assembly includes a support that has internal and external surfaces and a channel that aligns with at least one aperture of the pattern of apertures and extends between the internal and external surfaces. The membrane assembly includes indents that are adjacent to the channel, aligned with the pattern of apertures, and disposed on the external surface. The indents have a depth that is less than a depth of the channel.

An open audio device including an acoustic radiator that emits front-side acoustic radiation from its front side, and emits rear-side acoustic radiation from its rear side. A front acoustic cavity receives front-side acoustic radiation and comprises at least one front sound-emitting opening, and a rear acoustic cavity receives rear-side acoustic radiation and comprises at least one rear sound-emitting opening. The front and rear acoustic cavities each have a fundamental frequency. The fundamental frequencies are within one octave of each other.

The present disclosure provides an acoustic output apparatus including one or more status sensors, at least one low-frequency acoustic driver, at least one high-frequency acoustic driver, at least two first sound guiding holes, and at least two second sound guiding holes. The status sensors may detect status information of a user. The low-frequency acoustic driver may generate at least one first sound, a frequency of which is within a first frequency range. The high-frequency acoustic driver may generate at least one second sound, a frequency of which is within a second frequency range including at least one frequency exceeding the first frequency range. The first and second sound guiding holes may output the first and second spatial sound, respectively. The first and second sound may be generated based on the status information, and may simulate a target sound coming from at least one virtual direction with respect to the user.

The embodiment of the present disclosure discloses a sensing device, comprising: an elastic component; a sensing cavity, wherein the elastic component forms a first sidewall of the sensing cavity; and an energy conversion component configured to obtain a sensing signal and convert the sensing signal into an electrical signal, the energy conversion component being in communication with the sensing cavity, and the sensing signal relating to a change of a volume of the sensing cavity, wherein at least one convex structure is arranged on one side of the elastic component facing toward the sensing cavity, the elastic component drives the at least one convex structure to move in response to an external signal, and the movement of the at least one convex structure changing the volume of the sensing cavity.