PURPOSE: To demonstrate the effect of an exponential horn enclosure.
DESCRIPTION: A small loudspeaker is held up behind the opening of an exponential horn. The sound becomes much louder, especially in the bass. A horn enclosure has the effect of taking an extended source such as a loudspeaker and creating the best impedance match with the outside world, providing the most coherent plane wave.
REFERENCES: (PIRA 3B25.35)
EQUIPMENT: Audiocassette deck with cassette, horn.
SETUP TIME: None.
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