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.
由于具有低噪声输出，并采用了加固设计，它能用于军事与航空应用，包括机载、舰载和地面应用。
With its low noise output and rugged design, the 55lq2 is for military and aerospace programs, including airborne, shipboard, and ground applications.
由于战场使用环境的特殊性，环境噪声成为军事命令语音识别技术实用化的一个主要障碍。
Because of the particularity in battlefield environment, environmental noise is a main obstruction in the military order recognition technology.
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