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Old 3rd January 2010, 11:08 PM   #1
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Default Solenoid valve sub

I have been reading fan subwoofer threads and think I have an alternative for generating infra sound.

An array of high speed solenoid valves with a compesed air feed is fed a delta sigma modulated (200Hz modulation frequancy? with two sets of valves) version of the sub bass signal (3 - 20Hz).

Each set of valves is sent every other pulse such that the cycling frequancy of the valves isn't too high.

To avoid the noise of the valves been switching annoying the listener some kind of austic low pass filter would have to be used like a block of foam.

Here are some links as I am awfull at explaining things:
http://www.ittaerospace.com/pdf/solenoid_features.pdf
An Introduction to Delta Sigma Converters
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Old 3rd January 2010, 11:20 PM   #2
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The compressor would be kinda loud, too.
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Old 3rd January 2010, 11:28 PM   #3
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Compresor could be housed away from audio system and connected with hoses.
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