This is a problem people have? They can't just feel it?
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Starting in my late 40s the cutoff hasn't been all that reliable, although it seems invariant to noise. Unsure what answer best fits the poll.
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Interpreting "when" as "because of" so no. Seeing and feeling are the primary ways of telling.
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I feel it when I'm finished. Always. Can't imagine people having "trouble" telling if they're finished just because they can't hear it anymore lol.. that's crazy.

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