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BenL · 10-19-04, 10:34 PM

[ QUOTE ]
Wern't Bose or someone similar developing a noise cancelling sound system. Worked on the principal if the original sound wave was in the positive section the system generated a soundwave in the same frequency in the negative section thereby in effect nutralising the sound.

[/ QUOTE ]

Years ago Lotus Cars worked on something like that using the existing car stereo speakers. When they first demo'd the system at a car show, they had an engine running at their booth and you couldn't tell it was running, unless you put your hand on it to feel the vibration.

Another feature of the system is that you could also program it to modify the sound of the engine. So they had a little econo-box sounding like a huge V8. The test drivers had huge grins on their faces as the reved the little engine.

10-19-04, 10:34 PM	#8 (permalink)
BenL BenL 6 Tenths Join Date: Apr 2004 Location: USA Posts: 681 Rep Power: 11	Re: New Mr. Gasket sound deadening [ QUOTE ] Wern't Bose or someone similar developing a noise cancelling sound system. Worked on the principal if the original sound wave was in the positive section the system generated a soundwave in the same frequency in the negative section thereby in effect nutralising the sound. [/ QUOTE ] Years ago Lotus Cars worked on something like that using the existing car stereo speakers. When they first demo'd the system at a car show, they had an engine running at their booth and you couldn't tell it was running, unless you put your hand on it to feel the vibration. Another feature of the system is that you could also program it to modify the sound of the engine. So they had a little econo-box sounding like a huge V8. The test drivers had huge grins on their faces as the reved the little engine.