If you want to sound persuasive, mirror the other person's tone of voice.

Horgan figured the fellow was having a hard time trying to sound persuasive when he had to shout in order to be heard.

The substance is the funk, which is real; whatever Beck sings, he sounds persuasive.

This circular logic sounds more persuasive in print than it plays out on screen.

But again, Miss Kennedy's playing sounded committed and persuasive.

"But you know quite well, John" (how difficult it is to sound persuasive at the top of one's voice!)

Their words could sound persuasive, even as they ate away at the truth.

Having it both ways has rarely sounded more persuasive.

He does not seem to be trying hard to sound persuasive.

Published reviews sounds persuasive because they are written with an air of being objectively correct.