Custom microphones circuit, or listening circuit

摘要

Embodiments of the disclosure include hearing protection earmuffs, which generally might have two earcups providing passive noise reduction (e.g. an effective NRR to protect a user from a damaging external noise environment). Disclosed embodiments include systems and methods for transmitting external sounds to a speaker within the earcup, blocking transmission of sounds that are higher than a hearing protection threshold, amplifying sounds that are below the hearing protection threshold, and reducing or filtering undesirable background sounds by determining the frequency of the transmitted sounds.

主权项

1. A method for transmitting external sound through a hearing protection earcup comprising:
detecting, via a microphone and circuitry of a hearing protection earcup, external sounds outside the earcup; analyzing, by the circuitry of the hearing protection earcup, the detected sounds to determine decibel level and frequency of the sound; determining, by the circuitry of the hearing protection earcup, to transmit the detected sounds when the decibel level is lower than a preset hearing protection threshold; and determining, by the circuitry of the hearing protection earcup, to filter the detected sounds when the frequencies of the detected sounds are constant and within a preset frequency range for an undesired background sound; continuing, to transmit, by the circuitry, detected sounds only for the frequencies of the detected sounds outside of the preset frequency range for undesired backoround sound and only when the decibel level is lower than the preset hearing protection threshold.