speech volume indicator

例句：

1. 1. The speech volume indicator on the remote controls helps to adjust the volume of the audio output.
   遥控器上的语音音量指示器有助于调整音频输出的音量。
2. 2.The speech volume indicator is used to indicate the level of sound in a particular environment.
   语音音量指示器用于指示特定环境中的声音水平。
3. 3.In the recording studio, the speech volume indicator can be used to monitor the volume of the audio signal during recording.
   在录音室中，可以使用语音音量指示器来监控录音过程中的音频信号音量。