目的　研究声强和频率对发声稳定性的影响。方法　对正常成年男、女性各３０ 例，进行了嗓音声学测试。结果　随着声强增加或频率提高，发声稳定性增大，频率微扰和振幅微扰减小，ＨＮＲ增大。经方差分析，多数差异具有统计学意义（ Ｐ＜ ０ ．０５ 或０ ．０１） ，男性声强对ＨＮＲ 的影响无显著差异（Ｐ ＞ ０ ．０５） 。性别之间声学参数亦有差异。结论　声强和频率对发声的稳定性有影响，嗓音声学测试结果的判断应结合受试者的发声方式 Objective To study the effect of sound intensity and frequency on sound stability. Methods Normal adult male and female 30 cases, the voice acoustics test. Results As the sound intensity increases or the frequency increases, the sound stability increases, the frequency perturbation and the amplitude perturbation decrease, and the HNR increases. Variance analysis showed that most of the differences were statistically significant (P <0.05 or 0.01). There was no significant difference in the effect of male’s sound intensity on HNR (P> 0.05). Acoustic parameters vary between genders. Conclusion The sound intensity and frequency have an impact on the stability of vocalization. The judgment of vocal acoustics test results should be combined with the vocalization of subjects