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I retain my title as Most Pedantic Inmate

I now understand your point but, don't forget, that a sine wave and square wave have different peak-to-average ratios so it is not surprising they are perceived differently.

Back to the pedantry, the ear's sensitivity to sound pressure and our perception of loudness are different things. The pressure for 'just detectability' gives us the well known Fletcher-Munson curves where the y-axis is in pressure but hearing psychologists measure loudness in phons where test subjects compare subjective loudness of different sounds, like your comparison of sine and square waves. But to get to that point the sound pressure has already been 'measured' by the ear and now it is about signal processing.

As to masking, again, I am just curious to see some numbers for my own education. I would be grateful for any references that quantify the effect


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