November 2007
Intermediate to advanced
736 pages
46h 32m
English
Content preview from Consumer Electronics
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ACOUSTIC LABYRINTH SYSTEMS
The labyrinth is a tuned pipe with one open end. When the wave from the speaker reaches the end of the pipe, it spreads out into the listening environment causing a sudden pressure drop which reflects back through the pipe to the speaker as a rarefaction. At the quarter wave frequency (1/4) of the sound, the air in the mouth of the pipe is at minimum velocity but maximum pressure (Bernoulli's theorem). This condition produces an accompanying maximum rarefaction reflected back to the speaker cone. Here, the antiresonant action of the pipe offers maximum damping to the speaker (See Fig. 5.8 and 5.9).
Fig. 5.8 Drawings ...
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