Preciado J A, Fernández S
Hospital San Millán, Logroño.
Acta Otorrinolaringol Esp. 1998 Aug-Sep;49(6):475-81.
The aim of this study was to calculate the sensitivity and specificity of shimmer (APQ) and jitter (RAP) in the diagnosis of vocal pathology.
Digital audio tape (DAT) recorded voices of 64 hoarse patients (20 men and 44 women) and 64 persons without hoarseness (20 men and 44 women), all professional teachers, were analyzed acoustically. The vowel /a/ was analyzed physically using Sound Scope software. Eight parameters were examined using Sound Scope 1.0: amplitude of the perturbation quotient (APQ), harmonics-to-noise ratio (HNR), breathiness (BR), relative average perturbation (RAP), fundamental frequency (F0) and the standard deviation (SD) of F0, and intensity and its SD.
Taking 5.5% as a normal APQ value for this algorithm, the sensitivity was 0.75 and the specificity was 0.64. Seventy percent of the normal teachers had a RAP below 0.40% in women and below 0.32% in men, and 85% of hoarse teachers had higher values than those reported by us. As for BR, taking 17.5 dB as a normal reference, this algorithm had a sensitivity of 0.73 and a specificity of 0.41.
Individual study of these tests is interesting because each one measures a different aspect of vocal function. They are most useful when studied together.
本研究旨在计算闪烁（APQ）和抖动（RAP）在嗓音病理学诊断中的敏感性和特异性。
对64名嗓音嘶哑患者（20名男性和44名女性）以及64名无嗓音嘶哑者（20名男性和44名女性）的数字音频磁带（DAT）录音进行声学分析，所有受试者均为专业教师。使用Sound Scope软件对元音/a/进行物理分析。使用Sound Scope 1.0检查八个参数：微扰商数（APQ）的幅度、谐波噪声比（HNR）、气息声（BR）、相对平均微扰（RAP）、基频（F0）及其标准差（SD），以及强度及其标准差。
将该算法的正常APQ值设定为5.5%时，敏感性为0.75，特异性为0.64。70%的正常教师女性的RAP低于0.40%，男性低于0.32%，而85%的嗓音嘶哑教师的RAP值高于我们报告的值。至于BR，以17.5 dB作为正常参考值时，该算法的敏感性为0.73，特异性为0.41。
对这些测试进行单独研究很有意义，因为每个测试都测量了嗓音功能的不同方面。将它们一起研究时最有用。
