摘要
高噪声对音频信号有严重干扰,使通讯无法正常进行。介绍一种在高噪声(噪声级为100～125 dB)环境中使用的降噪通话系统。该系统具有很好的降低噪声、从噪声中分离出音频信号的功能,可实现2路或多路通话。利用头戴式耳机,在120 dB 的均匀噪声场中可以用像平时讲话一样的声音,实现清晰的通话;当噪声级达到125 dB 时系统工作仍令人满意,且能保护人的听觉。
High noise can disturb audio signal seriously and make the communica- tion out of order.A reducing noise communication system used in high noise back- ground(noise levels.100-125 dB)is introduced,which has a fine function to separate audio signal from high noise background.It can be used to make up two-way or multi-way intercom.In an uniform noise field where noise level is 120 dB,one per- son can clearly talk to others in normal voice with headsets.While noise level is up to 125 dB,the system still works well.
关键词
通讯
噪声干扰
动态降噪系统
communication
electronic technology
noise interference
noise reduction
dynamic system of noise reduction
