Is it possible to create a place, where sound, produces by room's environment, is loud in one or several points, but barely audible in other parts of the room?
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2$\begingroup$ Yes $\endgroup$– RedGrittyBrickCommented Mar 18, 2016 at 15:32
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$\begingroup$ Theoretically, yes, but note that our sound perception is nearly logarithmic, so it will be very hard to attain "barely audible" sound level. $\endgroup$– dominecfCommented Mar 18, 2016 at 16:53
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$\begingroup$ You can build a whispering gallery as in St Paul's Cathedral en.wikipedia.org/wiki/Whispering-gallery_wave or have a couple of concave surfaces youtube.com/watch?v=lC-47_ESeUw $\endgroup$– FarcherCommented Mar 18, 2016 at 17:16
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2 Answers
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Although your question seem to focus on shaping the room to influence the sound in it you may be interested in this Ted talk. It is about producing nonlinear sound waves that are only audible in certain spots.
http://www.ted.com/talks/woody_norris_invents_amazing_things
So same outcome with different technique.
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Yes, it is. Practically it is never so pronounced like optical foci (cause of characteristic length scales and wavelengths), but it is well-known sound engineering issue in non-rectangular rooms. It generally causes inhomogenous auditory experience and hence it is usually marked as an unwanted phenomenon.
answered Mar 19, 2016 at 18:51