sidetone

1.Natural Sidetone: Pure sine-wave receiver monitors signal.

然Sidetone ：纯信号接收显示器。

2.The listener sidetone rating defines the effect of interference sound on the voice quality.

背景侧音当量是在仿真量测当电话使用在吵杂环畤由送话端回授到受话端的量。