This psychoacoustic algorithm finds elements in the audio that have exceptionally low volume sounds, very high-pitched sounds, or sounds very close together which the MP3 compression discards, thereby saving space and making it a lossy compression format.

种心理声学算法会找到频中量极低的声、调极高或非常接近的声，声被MP3缩丢弃，从节省空间，使其成为有缩格式。

In psychoacoustic research, so much of the things that we know about the sound world were developed either for telephony or for the military.

在心理声学研究领域，我们对声世界的诸多认知，大多源自于为电话通讯或军事用途进行的研发。

Psychoacoustics—that is the branch of psychology concerned with the perception of sound and its physiological effects.

心理声学——是心理学的一个分支， 研究声的感知及其生理效应。