[sdiy] ot: law for high frequency damping in air? law for high frequency damping on reflections?

[Antti Huovilainen]

On Wed, 21 Jan 2004, Czech Martin wrote:

> If we now introduce energy dissipation, the higher frequencies will
> be damped more, how will the SPL law be: SPL(r,f)?

1/r * a*e^-br

> And: do you know how the reflection from a surface can be descibed?
> Like a filter (plus traveling time)?

If the surface is infinite, then it's simply time delay + filter. For
surfaces that are smaller (same order of magnitude as wavelength) it gets
very tricky with diffraction & dispersion etc.

Antti

Give a man a fire, and he'll be warm that day,
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