n.助听器...

adj.超声波（的）...

弱音助听器，听弱音...

hydroacoustics的音标：hydroacoustics的英式发音音标为：[haɪd'rəʊku:stɪks]hydroacoustics的美式发音音标为：[haɪd'roʊkustɪks]...

Animals use a whole rang of acoustic, visual, and chemical signals in their systems of communication.动物利用各种各样的听觉、视觉和化学信号来进行交流。She was backed by acoustic guitar, bass and congas.原声吉他、贝斯和康茄鼓为她伴奏。The disturbance is sound wa...

n.生物声学...

bioacoustics的音标：bioacoustics的英式发音音标为：[bi:əʊə'ku:stɪks]bioacoustics的美式发音音标为：[biəʊə'kustɪks]...

adj.听觉的，声学的...