Selected for use MFCC and the difference and divided the characteristic parameter as phonetic recognition, to describe the non-linear characteristic of frequency of sense of hearing of ears of people.
选用美尔倒谱系数及其差分作为语音识别的特征参数，来描述人耳的听觉频率非线性特性。
2
Model DL-850 FM Three-Band Wireless earphone, It has functions to receive both AF and FM signals and can be used to accept hearing training instead of wire earphone in phonetic room.