| 摘要 |
A device which automatically decreases the audio output of an audio system while a telephone is being used. The device includes sensor and control means, relay means, mode selection means and attenuation means. When the handset is removed from its cradle on a conventional telephone, an electrical signal is produced. The sensor and control means detects this signal and causes the relay means to interact with the attenuation means to effectuate a predetermined decrease in the audio output level of the audio system. The device automatically restores the audio output to its previous level upon the handset being returned to its normal position on the telephone cradle. The device's mode selection means enables one to operate the device in either an automatic mode, an attenuate mode or in a bypass (i.e., off) mode. Moreover, the device is designed to be directly attached to the telephone line rather than to the specific telephone and may be connected to a conventional audio system without the necessity of making modifications to the audio equipment.
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