| 摘要 |
<p>An audio source level control system in which the level of the audio source signal that is to be played over headphones is automatically set to an appropriate level. The system can include circuitry that can be controlled so as to increase or decrease the level of the audio signal that is provided by an audio source to the headphones; the audio source is typically a portable consumer digital device. There is a controller that is responsive to the audio signal from the audio source and that is adapted to control the circuitry so as to automatically establish a level of the audio signal that is provided to the headphones when the audio source is initially available to output an audio signal to the headphones.</p> |
