February 2016
Intermediate to advanced
216 pages
14h 38m
English
Content preview from Newnes Audio and Hi-Fi Engineer's Pocket Book, 3rd Edition
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SPL
Free
field
Reverberant
field
Near
Far
^v^e
field field
Distance
Figure
16.
SPL
variation in room or hall indicating the three
acoustic
fields.
The angle at which a sound is reflected is the same as the
angle of incidence, when compared to a perpendicular line
raised from the surface. When a corner is encountered, the
wave is reflected back on a separate but parallel path. A
concave surface focuses the sound, while a convex one
disperses it. Thus sound is reflected similarly to light.
Figure
17. How differently
shaped
surfaces
reflect
sound.
Sound
reflected from a flat
surface
appears
to
have
a ghost
image
behind the
surface
as
its
source ...
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