frequency modulation
amplitude modulation
modulation of tone
voice modulation
A: Did you notice the subtle modulation in her tone?
A：你注意到她语调中细微的变化了吗？
B: Yes, it made her words sound much more persuasive.
B：是的，这让她的话听起来有说服力多了。
1) 调节、改变或调整
2) 音乐中的转调
3) 通信中的调制
1. 调节，改变，调整
2. 音乐转调
noun
1. The act or process of changing or adjusting something, such as a tone, pitch, or frequency.
Synonym: adjustment, modification, alteration