Re: Re: Re: Re: Kleenex and Spit


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Posted by Mark in Ohio on August 18, 2000 at 22:42:04:

In Reply to: Re: Re: Re: Kleenex and Spit posted by Joe Baker on August 18, 2000 at 12:50:37:

Joe,

Yes, a reflector has to be significantly larger than the wavelengths intended to be reflected. The rough rule of thumb is 4 times the wavelength you hope to re-direct. Sound behaves like a fluid, and can "go around" objects, hence the 4x rule.

A low Bb (third space below staff) on the tuba is about 60 Hz. The speed of sound is roughly 1130 feet per second. Wavelength = speed of sound / frequency, so 1130 feet/60 Hz equals a wavelength of 18.833 feet.

A reflector that can control low Bb would therefore have to be about 75 feet in diameter. Bigger than MY basement, buddy.

~-0^0-~ Mark in Ohio.

PS: don't take up the clarinet. As Rick has proven, tuba carries the day better.


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