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通过对36例正常人和30例病态嗓音者的频域相对信噪比进行分析，结果表明：正常女性嗓音的频域相对信噪比呈稳定分布，而病态嗓音的相对信噪比＞1700Hz频段，与正常人比较，有显著差异（P＜0．01）。可以认为频域相对信噪比是区分病态嗓音和正常嗓音的有效参数。
The frequency-domain relative signal-to-noise ratio of 36 normal subjects and 30 patients with morbid voice was analyzed. The results showed that the relative signal-to-noise ratio of normal female voice was stable, while the relative signal-to-noise ratio of ill voice was> 1700Hz , Compared with normal people, there was a significant difference (P <0.01). It can be considered that the relative signal-to-noise ratio in the frequency domain is a valid parameter for distinguishing sick voice from normal voice.