1. 声的投射; 声投射：sound program transmission system ==> 音声放送中継方式 | sound projection ==> 声的投射,声投射 | sound proof box ==> 隔音箱
noun
1. the acoustic phenomenon that gives sound a penetrating quality
e.g. our ukuleles have been designed to have superior sound and projection
a prime ingredient of public speaking is projection of the voice
Synonym: projection acoustic projection