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Message - Re: Shell structures

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Posted by  Paul Malo on March 03, 2002 at 08:58:39:

In Reply to:  Shell structures posted by Verve on March 03, 2002 at 03:13:55:

What's the difference between a "saddle" and a "hyperbolic" surface? You're way ahead of me. Isn't a hyperbolic paraboloid the saddle form?

My advice from an acoustician: beware of ANY curved surfaces, since they tend to focus sound in some places, while reducing audibility in others. Acousticians like good, old-fashioned boxes, at least for QUALITY of sound (as in a concert hall). If you are more concerned with QUANTITY, as in pushing the sound far back into a space, then the curve of a parabolic shell, for instance, will serve to direct the sound where you want it.

If you're thinking of sound generated under a saddle shape reflector, sketch the angle-of-incidence = angle-of-reflectance diagram of sounds originating from a point source. You will readily see the effect, depending upon where, under the curve, the source happens to be located.

 
 
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