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Subwoofer Design like Fan without Sound
Subwoofer Design like Fan without Sound
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Old 6th December 2017, 01:39 AM   #21
W0J0 is offline W0J0  United States
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Originally Posted by scottjoplin View Post
Reed valves
He could use an aluminum cone and integrate reed valves into the cone itself. An added benefit would be increased cooling of the driver with all that air passing over it.

But this is a silly proposition, altogether. For one, 30 Hz is NOT below hearing. In fact, it's one of my favorite frequencies to hear and feel... But not constantly for hours on end.
Resources could be much better spent on a nice squirrel cage fan--they move a lot of air and are fairly quiet.
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Old 6th December 2017, 09:10 AM   #22
Kay Pirinha is offline Kay Pirinha  Germany
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Originally Posted by W0J0 View Post
For one, 30 Hz is NOT below hearing.

Quite right. The open H string of a 5-string bass guitar is tuned to about this frequency (30.85 Hz), and an organ's biggest 16' pipe resonates at a frequency not that much higher (32.69 Hz). Btw, the lowest C'' tone of an organ's 32' stop has a frequency of about 16 Hz that most of us may hear.

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