发明公开
- 专利标题: DUAL AUDIO PROGRAM SYSTEM
- 专利标题(中): SYSTEM FOR TWO音频节目
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申请号: EP96910352申请日: 1996-02-28
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公开(公告)号: EP0812492A4公开(公告)日: 2000-11-22
- 发明人: EGGERS PHILIP E , SANDERS GERALD J
- 申请人: EGGERS PHILIP E , SANDERS GERALD J
- 专利权人: EGGERS PHILIP E,SANDERS GERALD J
- 当前专利权人: EGGERS PHILIP E,SANDERS GERALD J
- 优先权: US39895195 1995-03-02
- 主分类号: H04R3/12
- IPC分类号: H04R3/12 ; G11B20/00 ; G11B31/00 ; H03G3/02 ; H03G3/04 ; H04B1/16 ; H04R5/04 ; H03G3/00 ; H04R5/02
摘要:
Dual program audio apparatus is provided having two or more sources of input audio program signals (34, 35, 36, 37, 38), switching circuitry (41) for selecting two of the input audio signals for amplification, one or more amplifiers (42, 43) for amplifying the selected input audio program signals, and one or more audio speakers (39, 40) for enabling a listener to hear both audio programs simultaneously. Volume control circuitry (44, 45) is provided for selecting a higher volume level for a foreground program and a relatively lower volume for a background program and circuitry is provided for selectively interchanging the foreground and background programs either instantaneously or gradually and continuously.
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