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General speaker questions for audio and home theater.

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of course it's true

Posted by DrChaos on November 28, 2020 at 13:55:51:
materials have quite distinct frequency-dependent absorption/reflection coefficients. At lower frequencies the interior construction of walls matter.
They're very colored acoustically, and it takes special engineering to make the equivalent of 'frosted white' diffusers.
And furthermore, air itself absorbs more at high frequencies because of viscous and thermal effects. Thunder right near a lightning bolt is a 'crack' (mixed high and low frequencies), but far away it's a rolling low frequency boom (high frequencies absorbed).