background modulation noise

例句：

1. 1.The background modulation noise is so loud that it drowns out the sound of the speech.
   背景调制噪声太响了，以至于淹没了演讲的声音。
2. 2. The engineer used a special filter to reduce the background modulation noise in the recording.
   工程师使用特殊的过滤器来减少录音中的背景调制噪声。
3. 3.The background modulation noise can be distracting and make it difficult for the listener to focus on the speaker's words.
   背景调制噪声可能会分散注意力，使听众难以集中注意力听讲者的言辞。