| 摘要 |
The components of a portable personal audio system include first and second audio signal source devices, such as an MP3 player ( 14 ) and telephone ( 16 ). These are connected via respective leads ( 12 ) to a control and switching stage ( 22 ), and from there to left and right audio output devices ( 26 ). User input to effect operation of the control and switching stage ( 22 ) selectively directs audio signals from one or both of the signal source devices ( 14, 16 ) to a selected one or ones of the left and right audio output devices ( 26 ).
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