A confident voice is not a deep, booming one. It is an unhurried one. Most of what makes someone sound sure of themselves comes down to pace, pauses, and cutting the little words that quietly undercut them.
Slow down
When nerves hit, people speed up, and fast talking reads as anxious and is harder to follow. Deliberately slowing your pace does two things at once. It settles your own nervous system, and it makes you sound like someone who is in no rush because they know what they are saying. Slower almost always sounds more certain.
Use pauses on purpose
A short pause before an important point gives it weight, and a pause after it lets the point land. Silence feels much longer to you than it does to your listener. What sounds like an awkward gap in your own head reads as composure to everyone else. Let the pauses in. They are also the cure for filler words, since an um is usually just a pause you were afraid to leave silent.
Drop the hedges
Words like just, sort of, kind of, and I might be wrong but are hedges. While you are making your point, they quietly tell people not to trust it. You do not need to be blunt or arrogant to cut them. You just say the thing. Notice your most common hedge and start catching it.
Land the ends of your sentences
A lot of people let their voice drift upward at the end of a statement, so it comes out sounding like a question they are not sure of. Bring the end of the sentence down instead. A settled, downward ending makes even a simple sentence sound decided.
Do not drone
A flat, one-note delivery reads as bored or nervous however good the words are, and it is the fastest way to lose a listener. You do not need to be theatrical. Just let your pitch move a little. Lift on the part you are genuinely excited about, drop and slow on the part that is serious. A voice with some rise and fall in it holds attention and sounds like someone who means what they are saying.
Breathe from lower down
A thin, shallow voice comes from shallow breathing. Breathe from your belly rather than your chest and your voice gets fuller and steadier, with more to carry the ends of your sentences. It is the same reason singers breathe the way they do.
Warm up before you go on
Your voice is a bit stiff for the first minute of talking, the same as the rest of you. Before a call or a recording you care about, say a few sentences out loud, ideally your opening line. You do not want the important moment to be the first time your voice has moved all morning.
The hard part of all this is noticing what you are doing while you are doing it, which is tough to catch on your own. We made an ambient app for exactly that. It runs on your Mac and gives you private feedback in the moment, and it never records or uploads anything.
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