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Old 10-25-2017, 03:39 PM   #7
Flint
Snowflake
 
Join Date: Mar 2006
Location: Dystopia
Posts: 13,136
A helmholtz resonator converts air pressure inside a speaker enclosure into reversed-phase sound waves, converting the speaker's back-wave into an in-phase addition to the speaker's front-wave output. Commonly referred to as as a port.
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