A device or instrument which gives a signal, etc., by sounding; also, the signal so given.
| 单词 | θ191840 |
| 释义 | society > communication > indication > signalling > audible signalling > [noun] > apparatus (2) soundera1884 A device or instrument which gives a signal, etc., by sounding; also, the signal so given. hydrophone1893 An instrument for the detection of sound by water; also of water, or of something in water, by sound. An instrument devised to give warning by… |
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