Patent
Voice switch device
Ryoji Suzuki,Masayuki Misaki +1 more
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TLDR
In this article, a filter circuit subjected to insertion and deinsertion control by a voice detection circuit and a switching citcuit was proposed to increase the suppressing sense of noise with less speech head and speech tail cutoff.Abstract:
PURPOSE:To increase the suppressing sense of noise with less speech head and speech tail cutoff by providing a filter circuit subjected to insertion and deinsertion control by a voice detection circuit and a switching citcuit. CONSTITUTION:A voice detection circuit 11 detecting the presence of a voice from an input signal, a filter circuit 12 providing the frequency characteristic to the input signal and a switching citcuit 13 outputting an input signal when the voice detection circuit 11 decides it to be sound and outputting an output signal of the filter circuit 12 when the circuit 11 decides to be silent are provided. Thus, when the voice detection circuit 11 detects the silence period of the input signal, the switching circuit 13 applies control to output the output signal of the filter circuit 12, then speech head and tail cutoff is less and the noise suppressing effect is large.read more
Citations
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PatentDOI
Circuit for suppressing white noise in received voice
TL;DR: In this article, a white noise suppressing circuit for suppressing white noise contained in a received voice of a speaker telephone apparatus is described, which includes a switch for shortcircuiting the filter, a detecting circuit for detecting the aural input signal, and a comparator for comparing an output of the detecting circuit with a preset voltage and for controlling the switch on the basis of the results of the comparison.
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