acoustic labyrinth : Spreety TV Online Glossary
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acoustic labyrinth n. 1. A type of
microphone design that provides for highly directional sound recording, as in a
hyper-cardioid microphone.
Two or more concentric tubes in front of (and sometimes around)
the diaphragm create a compact series of folded pathways through which all
sounds approach the diaphragm. On-axis sounds arriving from the front reach the
diaphragm in phase and record a strong signal. Off-axis sounds arriving from
different directions follow different length pathways to reach the diaphragm
and are partially or fully removed due to phase cancellation.
2. A type of speaker enclosure in which sound waves
emanating from the rear of the woofer cone travel through a long, folded
interior path before they reach the outside. This extends bass response
considerably. Compare pressure gradient; pressure operation.
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