| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication device capable of outputting a ringing tone easy to hear. SOLUTION: The communication device 10 includes a call termination detection part 24, a microphone 30, a noise analysis part 31, a control part 21, and a speaker 32. The call termination part 24 detects an incoming signal from a public line 51. The microphone 30 detects noise. The noise analysis part 31 analyzes noise levels in a plurality of divided frequency bands with respect to detected noise and outputs an analysis result. The control part 21 sets a frequency determined to be closest to a band having the lowest noise level, out of a plurality of preliminarily set frequencies as tone information of a ringing tone informing of detection of an incoming signal, on the basis of the analysis result and outputs a call termination command based on the tone information in response to detection of an incoming signal in the call termination detection part 24. The speaker 32 outputs the ringing tone based on the call termination command. COPYRIGHT: (C)2009,JPO&INPIT
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