[linux-audio-user] measuring sound volume

Steve Harris S.W.Harris at ecs.soton.ac.uk
Tue Mar 16 18:03:52 EST 2004

Yup, all very true, which is why I said rule of thumb, but even that may
be too strong :)

- Steve

On Tue, Mar 16, 2004 at 02:08:27 -0800, davidrclark at earthlink.net wrote:
> Regarding the inverse square law: Be careful! 
> This law applies to idealized situations such as point sources in isotropic,
> homogeneous media.  For a speaker in a  tunnel, for example, it does not hold
> true.  Speakers have radiation patterns as do electromagnetic devices such as
> antennae.  Boundaries are also important.  You will also have interference
> effects, etc.  I would anticipate that the inverse square law to be quite
> inaccurate, but being  outside will help.  I love theory myself, but this
> situation calls for the voice of experience.  (Now if that voice says,
> "Always use the inverse square law," please let me know.)  The best thing
> I can think of from a theoretical perspective (sort of) is to obtain the
> speaker patterns if you can.

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