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The effect of environmental noise on sound signal frequency discrimination

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Author:
No author available
Journal Title:
CHINESE JOURNAL OF NAUTICAL MEDICINE AND HYPERBARIC MEDICINE
Issue:
3
DOI:
10.3760/cma.j.issn.1009-6906.2001.03.004
Key Word:
抗噪声;言语通讯;频率辨别;可懂度

Abstract: 目的通过环境噪声对人体接收不同声信号频率辨别阈影响的试验,寻找某种具有抗噪声干扰的特殊信号,为研究抗噪声言语通讯装置提供理论依据.方法选取3种调制波,即纯音调频信号、调幅调频信号和方波,作为测试声信号,采用阈上测试法,以阈上40 dB信号辨别阈值为对照,分别测定S(信号)/N(噪声)比为0,-5,-10的频率辨别阈.结果以上3种信号的频率辨别阈为方波最佳,调幅调频波次之,纯音信号最差.结论本试验为抗噪声言语通讯开拓了新途径.言语若采用经调制后的方波或调幅波传递,将会获得满意的可懂度.

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