CCITT P.79-1999 标准详情
- 标准号:CCITT P.79-1999
- 中文标题:计算响度评定为电话套
- 英文标题:Calculation Of Loudness Ratings For Telephone Sets
- 标准类别:国际电报电话咨询委员会标准
- 发布日期:
Defines the practice preferred for calculating loudness ratings primarily in the case of local telephone systems which transmit a band of frequencies not exceeding about 180-4500 Hz. The two reasons for using loudness ratings for telephone sets is fi
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