| 摘要 |
An accessory for broadcasting audio from a portable electronic device to an automobile stereo receiver has an input/output port that couples the accessory to the device. The accessory receives an audio signal from the device and modulates the audio signal to a broadcast frequency. The modulated signal is coupled to the automobiles electrical system. The wiring in the automobiles electrical system then acts as an antenna that transmits the audio signal to vehicles stereo. Since the automobiles wiring is very close to the stereo antenna, an exceptionally clear, very low transmission can be achieved. The accessory is preferably adapted to be mounted in a 12-volt car outlet and can be configured to automatically identify an open frequency for transmitting the audio signal.
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