speech-noise ratio

例句：

1. 1. The engineer measured the noise level in the factory to ensure it met safety standards.
   工程师测量工厂的噪音水平以确保符合安全标准。
2. 2. The speech-to-noise ratio of the microphone was low, making it difficult for the speaker to be heard clearly.
   麦克风的语音噪声比很低，使得说话者难以清晰地被听到。
3. 3. The new phone has a high speech-noise ratio, making it easier for people to understand each other's voices.
   这款新手机具有高语音噪声比，使得人们更容易理解彼此的声音。