三种干扰噪声对汉语语言清晰度的影响

在不同室内声学特性、不同信噪比条件下探讨三种干扰噪声对汉语语言清晰度的影响。汉语语言清晰度测试信号与干扰噪声信号按照一定的信噪比混合,由听音人进行汉语语言清晰度主观评价。结果表明:当存在干扰噪声时,听音位置的声场特性和信噪比对汉语语言清晰度有显著影响,并且清晰度随听音位置的声场特性的改善和信噪比的提高而提高。听音位置的声场特性和信噪比哪个因素对清晰度的影响更为显著与干扰噪声的频谱分布有关;干扰噪声的频谱分布范围越宽,在相同听音条件(听音位置的声场特性和信噪比)下它对汉语语言清晰度的影响越大。

Effects of Different Kinds of Noise Sources on Chinese Speech Intelligibility

The effects of three kinds of noise sources on Chinese speech intelligibility are discussed under different room acoustical characteristics and signal-to-nosie ratio (SNR) conditions. Test signals are mixed with noise signals according to a given SNR and the Chinese speech intelligibility are rated by listener. The results show that both room acoustical characteristics in listening positions and SNR have significant effects on Chinese speech intelligibility and the intelligibility scores increase with improvement of room acoustical characteristic, in listening positions and increase of SNR under noise conditions. Which is more important depends on frequency spectrum distribution of noise sources. The wider the range of frequency spectrum distribution of noise sources is, the more significant the effect of noise source on Chinese speech intelligibility is under the same room acoustical characteristics in listening positions and SNR conditions.