modulating
調變
Mod·u·late v. t. [imp. & p. p. Modulated p. pr. & vb. n. Modulating ]
1. To form, as sound, to a certain key, or to a certain portion.
2. To vary or inflect in a natural, customary, or musical manner; as, the organs of speech modulate the voice in reading or speaking.
Could any person so modulate her voice as to deceive so many? --Broome.