reference sound level造句

例句与造句

1. In atmospheric sounding and noise pollution, "'ambient noise level "'( sometimes called "'background noise level "', "'reference sound level "', or "'room noise level "') is the background sound pressure level at a given location, normally specified as a reference level to study a new intrusive sound source.
2. It's difficult to find reference sound level in a sentence. 用reference sound level造句挺难的