BONE CONDUCTION MICROPHONES Russian patent published in 2023 - IPC H04R9/02 

FIELD: acoustics.

SUBSTANCE: bone conduction microphone comprising: a layered structure formed by a vibration unit and an acoustic transducer unit; and a base structure configured to load the layered structure, wherein at least one side of the layered structure is physically connected to the base structure; wherein the base structure is configured to vibrate based on an external vibration signal, and the vibration unit is configured to deform in response to vibration of the base structure; and the acoustic transducer unit is configured to generate an electrical signal based on the deformation of the vibration unit, wherein the resonant frequency of the bone conduction microphone is in the range of 2.5 kHz - 4.5 kHz, the vibration unit contains a suspended membrane structure, wherein the suspended membrane structure is connected to the base structure through a circular side of the suspended membrane structure, and an acoustic transducer unit is located on the upper surface or on the lower surface of the suspended membrane structure; the acoustic transducer unit is a ring structure, and the thickness of the suspended membrane structure located in the inner region of the ring structure is greater than the thickness of the suspended membrane structure located in the outer region of the ring structure.

EFFECT: improvement in the quality of human speech recognition even in a noisy environment.

9 cl, 44 dwg