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  #1  
Old 08-30-2010, 02:24 AM
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Default Woofer down to 1Hz?

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The TRW-17 subwoofer is powerful enough to make an entire room throb with bass energy. TRW-17 installations are complex and can easily run to $25,000. For home audio, the TRW-17 is typically mounted in an attic, basement, or side room so the spinning blades are always out of reach of small children and pets.

Regular subs can't reproduce the 11Hz fundamental frequency of a helicopter rotor, the low-frequency rumble of wind, or the infrasonic shockwave from an explosion, but the TRW-17 can do all of these things. Very deep bass is as much felt as heard. Eminent Technology claims the TRW-17 is now being used in theme park attractions, concert venues, professional audio applications, and research projects.
http://news.cnet.com/8301-13645_3-20...ag=mncol;title
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  #2  
Old 08-30-2010, 05:28 AM
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Sure the overpriced fan can generate bass frequencies down to 1 hertz but will it keep you cool in the summer

On a more serious point I’d love to hear it.
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  #3  
Old 08-30-2010, 06:12 AM
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You won't hear it, but feel it. Generally speaking, the human ear doesn't really respond to infrasound below ~20Hz, but the rest of your body does.

Regular audio/video material is usually mastered to remove frequencies below ~20Hz because no regular speaker can reproduce them anyways (and lower frequencies just use up energy and/or might damage speakers at loud volume levels). So that fan thing will only work well with audio material specifically created for it. (Not sure if that still applies for Blu-Ray consumer videos, or if they're mastered differently than CDs or DVDs.)

Also, this fan has a claimed frequency response of 1-30Hz at +/-4dB. Meaning, one still needs a regular sub to fill the ~25-80Hz range.

By the way, CNET is a bit late to the party - that thing has been available for a few years already.
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Old 08-30-2010, 11:12 AM
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Mmmh, finally we have a way to hear elephant communication recordings, oh wait.
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  #5  
Old 08-30-2010, 11:48 AM
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lol, I'm happy with 20-20k with whatever I'm listening too. . . heck ~40-16k is all you need.
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Old 08-30-2010, 02:12 PM
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I think 60-10k would even be fine. there so little useful audio there
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Old 08-30-2010, 05:09 PM
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Quote:
Originally Posted by ultrauber View Post
I think 60-10k would even be fine. there so little useful audio there
I wouldn't go that far, mp3s with a lowpass @ 15k sound funny to me. 16k+ is not very important at all tho.
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Old 12-19-2010, 09:35 AM
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Default High frequencies

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Originally Posted by Satellite_6 View Post
I wouldn't go that far, mp3s with a lowpass @ 15k sound funny to me. 16k+ is not very important at all tho.
Au contraire! The program material up to ~40kHz is very important because it interacts with the lower audible frequencies. This is why professional equipment goes up to 192kHz sampling.
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Old 12-19-2010, 10:01 AM
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If you mean regular CDs by "up to ~40kHz" - well, they only contain audio up to the Nyquist barrier, half of the sampling frequency - 22.05kHz in that case.

Higher bit depths and sampling rates are relevant for professional audio editing, cutting down on loss due to repeated destructive editing steps - but those files are completely irrelevant for playback on a home system. Frequencies above the hearing range have no influence on the perceived sound whatsover, that's just some "audiophile" myth.

I downsampled several 24/96 SACD and DVD-A tracks myself with professional tools to 16/44.1, for testing - there is not even the slightest noticeable difference in a double-blind ABX test between 24/96 and 16/44.1.
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  #10  
Old 12-19-2010, 01:50 PM
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Maybe that myth won't survive a double-blind ABX test, but hey it's a great way for audiophiles to stand out from the crowd.
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  #11  
Old 12-19-2010, 06:06 PM
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Quote:
Originally Posted by DaveReed View Post
Au contraire! The program material up to ~40kHz is very important because it interacts with the lower audible frequencies. This is why professional equipment goes up to 192kHz sampling.
No for real music, and also no.
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