sine wave – soundQuality org

If human hearing upper limit is 20 kHz then how does a 15 kHz sine-wave sound so remarkably different from 15 kHz square-wave ?

Updated February 21, 2024 | Published December 1, 2023 by M

The first (even, sine-wave) harmonic of 15 kHz is, by definition, 30 kHz, more than the supposed ‘upper limit’ of human hearing. The first (odd, square-wave) harmonic of 15 kHz is, by definition, 45 kHz, also more than the supposed ‘upper limit’ of human hearing. The 15 kHz fundamental of both sine and square is … Read more

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