| 摘要 |
PROBLEM TO BE SOLVED: To smoothly enable a call, even if hands-free mode is selected during a call. SOLUTION: In a telephone machine 100, when a transmission/reception section 1 receives a call via an antenna 1a, a sound source IC is controlled by a CPU, and a call voice signal generated from the sound source IC is outputted from a loudspeaker 5 as a call tone (arrival signal tone). In this case, a call tone (arrival signal tone) outputted from the loudspeaker 5 is routed to a microphone 6. Additionally, a call voice signal generated from the sound source IC is inputted to an adaptive filter 3a in an echo canceller section 3. Then, the CPU controls the echo canceller section 3 and activates the echo canceller section 3. |
