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  • Title: [A clinical study about occupational noise-induced hearing loss measured and diagnosed with transient evoked otoacoustic emissions].
    Author: Wang H, Jiang C, Zhou F, Wu P, Zhang S, Liu W, Huang Y.
    Journal: Lin Chuang Er Bi Yan Hou Ke Za Zhi; 2004 Apr; 18(4):209-11. PubMed ID: 15318633.
    Abstract:
    OBJECTIVE: To study the feasibility and clinical values of occupational noise-induced hearing loss measured, evaluated and diagnosed with transient evoked otoacoustic emissions (TEOAE). METHOD: Pure tone threshold and TEOAE were performed in 11 (22 ears) young adults with normal hearing of control group and 90 (180 ears) noise exposure workers of test group. According to length of noise exposure time, test group was disparted to test 1,2,3 groups. Stimulated tone of TEOAE is non-linearity click of 80 dB SPL. RESULT: In test group and test 1,2,3 group against control, pure tone threshold in all frequency increased significantly, and correlation, strength and SNR of TEOAE in overall and every frequency declined significantly (P<0.05 or P<0.01). To observe test 1,2,3 group, It was found that pure tone threshold in all frequency increased and correlation, strength and SNR of TEOAE in overall and every frequency declined, when length of noise exposure time is increased. In 2.50-3.50 and 3.50-4.50 kHz, measuring values of TEOAE declined most significantly. CONCLUSION: Occupational noise-induced hearing loss can been measured and diagnosed significantly with TEOAE. The best observed contents is correlation, strength and SNR of TEOAE in overall and every part frequency. The best sensitivity observed frequency parts of TEOAE is 2.50-3.50 and 3.50-4.50 kHz.
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