pressure is high, the bass of a certain value of the audio frequency range, called the frequency response characteristics of the speaker. Speaker frequency characteristics should be 20 ~ 20KHz, so that we can all even audio replay, but this can not be done. Each speaker can only be reproduced in a certain part of the audio.
4, distortion speaker can not realistically reproducing the original sound out of the phenomenon is called distortion. Distortion in two ways: frequency distortion and nonlin