NewScientist The Last Word - Tag 'loudness' details

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How does volume (as in loudness) aggregate? If you played the same note, in 500 versions of exactly the same speakers (so all the same frequencies) at the same distance from the receptor (ear or decibel meter), would it be the same volume? If it would increase, how much by and why? Would it be 500 times? Or would some be cancelled out? Thanks!
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Why do singers often close their eyes when singing particularly loud or high notes? Does it help them with volume/tone?
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Categories: Human Body.

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