Objective to probe into the effects of military noise on the hearing threshold of the speech frequency and high frequency in the elders.
目的探讨军事噪声对老年人言语频率及高频听力的影响。
Objective to probe into the effects of military noise on the hearing threshold of the speech frequency and high frequency in the elders.
目的探讨军事噪声对老年人言语频率及高频听力的影响。
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