名词
中文翻译：回声测量仪
同义词：
['echoscope', 'echometer']
例句：
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1. The echo meter is usedto measure the distance between two points ina room.
回声测量仪用于测量房间内两点之间的距离。
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2. The echo meter wasused to detect the presence of an objectin the room.
回声测量仪被用来检测房间内物体的存在。
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3. Theecho meter was usedto measure the sound pressure levelin the room.
回声测量仪被用来测量房间内的声音压力水平。