Electrical audio signal processing systems and devices – Monitoring of sound – Amplification control responsive to ambient sound
Patent
1996-09-10
1998-07-07
Isen, Forester W.
Electrical audio signal processing systems and devices
Monitoring of sound
Amplification control responsive to ambient sound
34082524, 34082525, 34082572, 348632, 381107, H03G 300
Patent
active
057780773
ABSTRACT:
A method and device for automatically adjusting the volume of an existing audio device such as a television and/or stereo receiver. The automatic volume adjusting device of the present invention includes a receiver for receiving control signals transmitted from a remote control transmitter associated with the audio device, a transmitter for transmitting control signals to a control signal receiver of the audio device, a microphone for sensing an ambient noise level, and a controller coupled to the receiver, to the transmitter, and to the microphone. The controller operates in a training mode and an operating mode. In the training mode, the controller learns codes associated with volume adjusting control signals transmitted by the remote control transmitter. In the operating mode, the controller determines when the ambient level of noise detected by the microphone is outside a predefined volume range and adjusts the volume of the remotely controlled audio device to fall within the predefined range by transmitting the learned control signals to the audio device. The automatic volume adjusting device may further include a push-button toggle switch and an indicator light, such as a light emitting diode (LED) for placing the controller in a training or operating mode and a power converter for converting power supplied from a 110-volt AC wall outlet to a DC voltage for internal use within the device.
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