| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a communication terminal capable of obtaining excellent speech communication quality by eliminating various problems generated by the voice quality of the opposite side, the characteristics of the line and the opposite terminal, the environment where a self is placed, etc. SOLUTION: Two voice quality change modes are prepared. One is a noise mode that corrects voice masking when a speaker exists under noise and the other is a voice quality mode used in case the opposite voice is hard to listen to in a normal speech communication mode. It is possible to set the communication terminal to the noise mode or the voice quality mode by reading data stored in a memory 25 and in such a manner that an operation processor 24 controls a digital equalizer 15, a noise suppressor 16, a volume 17, an echo canceler 18 and a sidetone additional circuit 19 with the data.</p> |
