The Gymnastics of Speech.

You can damage your vocal cords! Check out this singer's techniques in how to properly exercise and elasticize your money makers.

I said to her, "What floor?," as one does in New York — you're going to push the button for someone. And with those two words, she said, "Oh, you've got a serious voice injury." And I said, "Oh, it's nothing. It'll clear up." And she said, "No, no, no. I work with Broadway singers."

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https://www.npr.org/sections/health-shots/2021/01/26/960495618/a-writer-lost-his-singing-voice-then-discovered-the-gymnastics-of-speech