ACOUSTIC DEVICE Russian patent published in 2023 - IPC H04R3/00 

FIELD: acoustic devices.

SUBSTANCE: devices for collecting sounds, namely devices having the function of sound transmission. Acoustic device for the sound transmission function includes the first and the second sound wave sensors for receiving sound waves and outputting the first and the second signals based on said sound waves; and a signal processing circuit connected to the first sound wave sensor and the second sound wave sensor to generate an output signal based on the first signal and the second signal. In this case, the target near-field sensitivity of the acoustic device to the target near-field sound wave emitted by the target near-field acoustic source is significantly lower than the far-field sensitivity of the acoustic device to the far-field sound wave emitted by the far-field acoustic source. The second target distance between the target near-field acoustic source and the first sound wave sensor is less than the first target distance between the far-field acoustic source and the first sound wave sensor.

EFFECT: causes amplification of the far-field sound wave during operation.

20 cl, 12 dwg