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DSP Beam Steering with Modern
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2010-06-29
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There are two ways to aim the sound of modern, high-powered
loudspeakers: physically and “virtually.”
Physically aiming loudspeakers is straightforward – you point
the loudspeakers where you want the sound to go. However,
as professional sound designers know, loudspeakers are not like
flashlights and sound does not behave like light; loudspeakers
don’t create perfect spotlights of sound at all frequencies. And
unlike light, the sound from two different loudspeakers aimed
at the same location can create audible phase cancellations and
combing. (Actually, light from two different instruments creates
cancellations as well, but the speed of light is so fast and the
wavelengths are so small that our eyes can’t see the cancella-
tions).
loudspeakers: physically and “virtually.”
Physically aiming loudspeakers is straightforward – you point
the loudspeakers where you want the sound to go. However,
as professional sound designers know, loudspeakers are not like
flashlights and sound does not behave like light; loudspeakers
don’t create perfect spotlights of sound at all frequencies. And
unlike light, the sound from two different loudspeakers aimed
at the same location can create audible phase cancellations and
combing. (Actually, light from two different instruments creates
cancellations as well, but the speed of light is so fast and the
wavelengths are so small that our eyes can’t see the cancella-
tions).
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