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Or any hearing aid? That said, hearing aids in particular employ circuitry specific tuned to only amplifier the desired sound and frequency range intended to be
by martyvis 7y ago
Or any hearing aid? That said, hearing aids in particular employ circuitry specific tuned to only amplifier the desired sound and frequency range intended to be heard, modern ones having profiles for normal speech, congregations, music, etc.
- doomrobo 7y agoMicrophones pick up harmonics of the input frequencies. So if the ultrasound white noise is a multiple of the human voice range, it'll get let through.
- deleted 7y ago[deleted]