Sound reproducer
    1.
    发明授权
    Sound reproducer 失效
    声音再现器

    公开(公告)号:US4933768A

    公开(公告)日:1990-06-12

    申请号:US381923

    申请日:1989-07-19

    IPC分类号: H04S3/00 H04S7/00

    摘要: A television receiver includes a volume control circuit (4) for controlling levels of sound signals corresponding to a left channel, a right channel, a center channel and a surround channel and speakers (6 to 10) corresponding to these channels. The television receiver further comprises a test tone circuit (11; 18), a microcomputer (14) and a character display circuit (16). The test tone circuit (11; 18) supplies a test tone of a prescribed frequency sequentially to the speakers (6 to 10) through the volume control circuit (4). The microcomputer (14) provides a command to the character display circuit (16) so that a CRT 17) displays which speaker is currently supplied with the test tone as well as volume levels of the respective speakers.

    摘要翻译: 电视接收机包括用于控制对应于左声道,右声道,中央声道和环绕声道的声音信号的音量控制电路(4)以及对应于这些声道的扬声器(6至10)。 电视接收机还包括测试音电路(11; 18),微计算机(14)和字符显示电路(16)。 测试音电路(11; 18)通过音量控制电路(4)向扬声器(6〜10)依次提供规定频率的测试音。 微型计算机(14)向字符显示电路(16)提供命令,使得CRT 17)显示当前提供测试音的扬声器以及各扬声器的音量。