sound level control

例句：

1. 1. The sound level control system is designed to prevent noise pollution.
   声级控制系统旨在防止噪声污染。
2. 2. The engineers carefully adjusted the sound level control to ensure optimal performance.
   工程师们仔细调整了声级控制系统，以确保最佳性能。
3. 3. During the recording session, the sound level control was crucial for maintaining a consistent audio quality.
   在录音期间，声级控制对于保持音频质量的一致性至关重要。