500 Hz masking level difference test for Chinese: a pilot study

VernacularTitle:500 Hz掩蔽级差在普通话人群中的初探
Author: Gong ZHANG ¹ ; Li QI ; Yonghua WANG
Author Information

1. 浙江中医药大学听力语言与科学学院
Keywords: Hearing tests; Perceptual masking; Reference values; Age factors; Sex factors
From: Chinese Journal of Otorhinolaryngology Head and Neck Surgery 2014;49(9):765-768
CountryChina
Language:Chinese
Abstract: Objective A pilot study found the masking level difference (MLD) normal value of Chinese aged from 10 to 40,served to clinical practice.Method Seventy-three normal persons with hearing threshold ＜ 20 dB and no disorder of otology were divided into three groups:classified 10-20 age as A group,21-30 age as B group,31-40 age as C group.MLD of age,gender and race were determined by the audiometer with dual channel by playing audio test disc.Same tests were compared with English language.Results The mean value of MLD in Chinese was (11.1 ± 3.4) dB and the 95 ％ normal reference values were between 4.4 to 17.8 dB.There was no difference in term of gender.The value of MLD increased with age.In the term of language,foreign showed high value of MLD than that of Chinese.Conclusions The measuring of MLD depends on age and language but not depends on gender.The normal threshold of MLD depends on age and language should be measured when normal values were applied to assess MLD in clinical practice.