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----_________------ t1_j2050f0 wrote

do not use sine sweeps for flatness. as u/The_D0lph1n said, the brain perceives different frequencies as louder or not. Sine sweeps might be useful for dips/peaks and channel matching, but thats pretty much it. Use music (or pink noise) and adjust using a reference if you want flatness

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TheFrator t1_j207057 wrote

If OP wants to know more- here's a decent wikipedia article on Equal-loudness contour - https://en.wikipedia.org/wiki/Equal-loudness_contour

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gotok1324 OP t1_j20cpjn wrote

I just read the page. Very interesting subject, specially about the changes the Fletcher Munson curve had and ended up being actually close to what we have today as the standard. Thank you!

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WikiSummarizerBot t1_j2071ue wrote

Equal-loudness contour

>An equal-loudness contour is a measure of sound pressure level, over the frequency spectrum, for which a listener perceives a constant loudness when presented with pure steady tones. The unit of measurement for loudness levels is the phon and is arrived at by reference to equal-loudness contours. By definition, two sine waves of differing frequencies are said to have equal-loudness level measured in phons if they are perceived as equally loud by the average young person without significant hearing impairment.

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gotok1324 OP t1_j206shw wrote

Thank you! Some time ago I tried to match my little USB speakers to the sound of my headphones calibrated to the Harman target, and I managed to get a pretty decent sound, even from these cheap speakers! I'll try to do it using pink noise though, sounds interesting

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