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Sure. We can do it now. But since the wavelength of sound is in the

neighborhood of 620,000 times longer than the wavelength of light,

in order to focus sound into a beam as narrow as you can focus light,

you need a 'dish' that's 620,000 times bigger than the concave mirror

you could use for light.

The 100-inch Hooker telescope on Mt. Wilson has been used to focus laser

light onto the moon. To focus sound into the same size beam, you need a

dish about 978 miles across, with the souind source at its focus.

Just like so many other examples of technology, the science and the math

are bullet-proof and air-tight, and the only thing we're missing is the $$$ .

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