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by xani__
1341 days ago
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To elaborate, the tube is tuned right below where in closed box the speaker would lose efficiency, so the frequency shift is 180 degrees, and as it takes air from behind it (which is shifted by 180 so it gets to 360 total). But that causes the frequency curve to drop steeper below that. There is also variant of that where instead of pipe hole there is an extra passive membrane https://en.wikipedia.org/wiki/Passive_radiator_(speaker) |
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