嗓音客观评价的探讨

Objective Evaluation of Basic Quality of the Voice

通过对36名正常组和30名中、轻度病态嗓音组成年女性的频域相对信噪比进行分析,结果表明:正常嗓音的频域相对信噪比呈一个稳定的分布,而病态嗓音的相对信噪比在大于1700Hz频段与正常对照组有显著性差异(P<0.01).在此基础上,引入模糊数学的隶属函数(μ)来描述颇域相对信噪比的分布,此函数能够准确直观的定量表示噪声分布情况,可以认为(μ)函数可作为客观定量评价嗓音素质的有效参数.

The frequency - domain relative signal - to - noise ratios were analysed in 36 normal women and 30 patients who had moderate or light degree of abnormal voice. The result indicated that the frequency -domain relative signal - to - noise ratios of the normal voice were distributed stably and the relative signal - to - noise ratios of the diseased voice differed obviously from that of the normal one above 1 700 Hz(P<0.01). We described the distribution of the relative signal - to - noise ratio with fuzzy(μ) function. The fuzzy (μ) function described exactly and directly the distribution of the noise in fixed quantity. It was considered as the efficacious parameter in objective evaluation of the basic quality of the voice.