He wanted to make an instrument that could play a note longer than notes played on a traditional acoustic guitar.

VOA: special.2009.09.27

This is described as actually one of the top two or three acoustic concert halls in the whole world.

是不会坐到坏点位置,死角位置的，它被誉为是。

麻省理工公开课 - 化学原理课程节选

We're used to thinking about sound being tranduced; being converted by acoustic waves into electrical signals that can be recognized by your iPods.

我们想想声音信号的转换过程,声音由声波转化为电子信号,你的iPod能够识别这种信号

耶鲁公开课 - 生物医学工程探索课程节选

And this design reduced feedback, a noise problem common with acoustic guitars.

VOA: special.2009.09.27

Fans will recognize veteran keyboardist George Duke, who co-wrote three tunes with Harp and performs acoustic and electric piano.

VOA: standard.2010.04.12

Henderson has been making acoustic guitars for friends, neighbors and others for nearly 50 years in his hometown in Grayson County,Virginia.

VOA: standard.2010.07.06

Samples of dung will also be gathered, photographs taken, and acoustic instruments will record the animals' distinctive calls.

VOA: standard.2010.01.05

Some of the more popular items include Elvis Presley's 1975 Lincoln Continental automobile, his personal jukebox, and an acoustic guitar that was seen and heard by millions.

VOA: standard.2010.01.07

That CD contains stripped-down acoustic versions of the 11 tracks.

VOA: standard.2010.07.13

True to tradition,these musicians use only acoustic instruments.

VOA: standard.2010.05.28