SOUND SIGNAL AMPLITUDE SUPPRESSING APPARATUS

摘要

When, in conventional sound systems, signals of sounds collected by a microphone are amplified and the amplified signals are applied to an ear by an earphone and a headphone, too loud sounds and environmental noises are unpleasant, and the intelligibility of words are poor. Hence, such problems are to be addressed. In addition, downsizing and performance improvement for sound apparatuses are to be accomplished. A signal having undergone an amplitude limitation with reference to an output potential of a high cut filter 17 which is an output by a low cut filter 12 in a high frequency band and inverted by an inverter 14 is added with, by an adder 15, an output signal from the high cut filter 17, and an addition signal is output.

主权项

1. A sound signal amplitude suppressing apparatus comprising:
an amplitude limiter shifting, when an amplitude of an input signal exceeds a predefined level, a bias potential in an opposite direction to a change in the amplitude; and a high cut filter eliminating or attenuating a high-frequency signal component in an output signal from the amplitude limiter, and outputting a signal having undergone the elimination or the attenuation.