有源抗噪声送话器和受话器

传统的抗噪声送话器和受话器的低频抗噪声能力一般都很有限,而现代的强噪声环境的噪声能量却越来越多地集中于中、低频段。在有源护耳器的基础上发展起来的有源抗噪声送话器和受话器,不仅具有优越的低频抗噪能力,而且在声音的衰减中还有一定的选择性;在大大提高低频噪声环境中的语言通讯信噪比的同时,还保证了很高的语言清晰度。本文在文献[1]的基础上,详细讨论了有源抗噪声送、受话器的基本原理、结构和实验研究结果。

Active anti-noise transmitter and receiver

Generally,conventional anti-noise transmitters and receivers have limited low-frequency capability of noise reduction,while more and more sound energy of the modern high-intensity noise environment converges in the middle-and low-frequency range.Active anti-noise transmitter and receiver,developed from the active ear defender,supply these devices not only with the benefit of advanced low frequency anti-noise capability,but also a selectivity in the reduction of sound.This later virtue ensures a high speech intelligibility at the time while the signal-noise ratio of speech communication is highly raised in a middle-and low-frequency noise environment.On the basis of ref.[1],a detailed discussion on the principle,structures and experimental results of active antinoise transmitters and receivers is given in this paper.