Your vocal folds aren’t spared from this shrinkage, Hunter says.Īs the muscle fibers within the folds become less bulky, your voice sounds higher. Each is about the width of a fingernail, made mostly of muscle, and lined with mucous membranes.Īfter about age 30, you start to lose muscle mass all over your body, a phenomenon called sarcopenia. Johns, M.D., director of the USC Voice Center in Los Angeles. ![]() ![]() ![]() Your larynx contains two vocal cords-or as experts call them, vocal folds-that vibrate about 120 times per second to produce sound, says Michael M.
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