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I’d suggest that’s likely what’s doing it. I’ve always thought of it (well I was taught it like this) the raspy tone requires a kind of partial vocal fold closure. This makes it act like a sail in the wind when the air rushed past it. If we push a lot of air through it, we effectively expose that sail to a storm and it’s likely to rip and tear. I always get my students fully voicing high notes as any kind of vocal distortion effect (like rasp or growl) can really easily damage the throat.
