acoustic|acoustics

酒吧里有一支乐队在演奏原声吉他。

There's a band playing an ___acoustic guitar in the bar.

这个报告厅的声学效果很好，每个角落都能听清演讲。

The lecture hall's good ___acoustics ensure clear sound in every corner.

这个房间的音响效果很差，声音听起来很模糊。

The ___acoustic quality of this room is poor, making the sound unclear.