Noise Reduction

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Anonymous
Noise Reduction 2016-12-26 12:39:31 Post No. 8562799
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Noise Reduction Anonymous 2016-12-26 12:39:31 Post No. 8562799 [Report]

Hey Sci
I was wondering when there are rotor blades (computer fan, helicopters etc) where is sound generation most intense and how does it spread. Where is it the loudest? Is there a good ressource with live animation gifs somewhere where you can login with ivy league login to use the software?

Anonymous 2016-12-26 02:19:03 Post No.8562914
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Anonymous 2016-12-26 02:19:03 Post No.8562914 [Report]

>>8562799
Bumping the bump, so that it isn't just OP.

Anonymous 2016-12-26 02:32:27 Post No.8562921
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Anonymous 2016-12-26 02:32:27 Post No.8562921 [Report]

http://physics.stackexchange.com/questions/69915/what-part-of-the-fan-blade-actually-does-the-noise-generation

Literally the first link when googled "how does a fan make sound?"

Anonymous 2016-12-26 05:03:01 Post No.8563123
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Anonymous 2016-12-26 05:03:01 Post No.8563123 [Report]

>>8562914
Thanks!
>>8562921
Thank you for the link, very good and detailed answer, just what I looked for
The ultimate thing would be a program where I could type in all the data and get results on frequencies and power (dB) if anyone knows anything let me know!

Also: I read that in active noise cancellation the undesired noise is not eliminated, it's just quiet in a small area but even stronger in other areas (shiftibg, not eluminating) can anyone confirm this and or give me source

Thanks

Anonymous 2016-12-26 07:07:07 Post No.8563255
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Anonymous 2016-12-26 07:07:07 Post No.8563255 [Report]

>>8562799
Just scream louder to drown out the sound, OP.

Simple.

Anonymous 2016-12-27 01:04:50 Post No.8564497
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Anonymous 2016-12-27 01:04:50 Post No.8564497 [Report]

>>8563123
>The ultimate thing would be a program where I could type in all the data and get results on frequencies and power (dB) if anyone knows anything let me know!
You'll probably want to learn some finite element methods and look up some differential equation for sound propagation.

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I'm aware that Imgur.com will stop allowing adult images since 15th of May. I'm taking actions to backup as much data as possible.
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