| 摘要 |
PURPOSE:To attain ease of listening of a received voice by controlling the voice quality of the received voice based on the noise in a cabin and the voice volume and frequency distribution of the received voice. CONSTITUTION:The received voice from an automobile telephone set 1 is branched (5) and fed to an adaptor 4. Then the received voice is fed to a voice volume discriminating circuit 16 and a frequency distribution analysis circuit 18, and the voice volume and the frequency distribution are detected. On the other hand, noise in the cabin is detected by a microphone 10 and the noise amount detecting circuit 12. Then an output of the circuits 16, 18, 12 is fed to an electronic control circuit 14. The quality of voice is adjusted by using a voice volume adjusting circuit 20 and a voice frequency adjusting circuit 22 based on the noise in the cabin, the voice volume of the received voice and its frequency distribution applied to the control circuit 14. Then the voice is outputted via a speaker 24. Thus, the received voice is handled for ease of listening. |
