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1. (WO2014199699) AUDIO SIGNAL AMPLITUDE SUPPRESSION DEVICE

Pub. No.:    WO/2014/199699    International Application No.:    PCT/JP2014/058601
Publication Date: Fri Dec 19 00:59:59 CET 2014 International Filing Date: Thu Mar 27 00:59:59 CET 2014
IPC: H03G 11/02
H03G 11/04
H04R 25/00
Applicants: LARGE.INC
ラージ有限会社
Inventors: OSHIMA, Kenichi
大島 賢一
Title: AUDIO SIGNAL AMPLITUDE SUPPRESSION DEVICE
Abstract:
In conventional sound systems, when an audio signal collected by a microphone is amplified and imparted to the ear by earphones or headphones, excessive sound and background noise is unpleasant and the intelligibility of speech is poor. Accordingly, the purpose of the present invention is to improve the foregoing and to make a sound apparatus small and high-performance. In the present invention, the following are provided: an amplitude limiter (1) in which when the amplitude of an input signal exceeds a stipulated level, bias potential shifts in the direction opposite to the amplitude change; and a high-cut filter (2) by which the high-frequency components of the signal output from the amplitude limiter (1) are removed or attenuated before output.