诊断耳聋常用的电测听一般是指纯音测听,是以各种不同频率、不同强度(声级)的纯音(正弦波)分别对受试者作气导和骨导测定,并以500、1000、2000Hz三档频率的听阈均值作为诊断耳聋的指标。由于语言是多种频率纯音的组合,频谱广、瞬变快、声强参差不齐,而500、100、2000Hz听阈均值小于25 Diagnosis of deafness Commonly used electrical audiometry refers to the pure tone audiometry, is based on a variety of different frequencies, different intensities (sound level) pure tone (sine wave), respectively, for the subjects for air conduction and bone conduction determination, and 500, 1000,2000 Hz third gear frequency hearing threshold as an indicator of diagnosis of deafness. As the language is a combination of a variety of frequency pure tone, wide spectrum, fast transient, the sound intensity is uneven, and 500,100,2000Hz listen threshold average less than 25