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Infrasonic sound mmmmmm
Ok so i’m an organist and what not. The church I play for is building a new church and i’m in charge of what new instruments will go into this building. SO, in the quest for the most epic digital organ EVER, i’m always on the lookout for new technologies. Marshall & Ogletree make some amazing instruments. They capture every nausence of sound and transfer it until digital form. SO, without going into too much detail about organs, basically there’s no digital organ/sound system that can reproduce the lowest notes on the organ at a clean/clear/high dB. 32′ and 64′ pipes on an organ reproduce sounds in the 8-16hz range. All cone subwoofers roll off around 18-20hz. So these guys bundled up with http://www.eminent-tech.com/ to install a ‘rotary woofer’ that can produce infrasonic sound down to 1hz. I mean wtf….that kind of wave movement will kill you at high enough pressures. It’s kind of funny, it looks like an oversized desk fan but the technology is really cool. The whole system installed is about $20k, only requires a 200w amp, but you need a whole attic worth of space. Apparently the rotary woofer has been around for quite some time (and is patent pending hahah) but its the first i’ve heard of it.
about 3 years ago
I just read a few of the articles on their site about it and I still don’t understand how it works. They need some better explanations…Is there a PGPub I can look at? From what I saw it looks like they just stuck a fan on top of a bandpass sub box…Really? I guess I need to read something about what that thing is actually doing to the pressure…
about 3 years ago
lol yea there site kinda sux. Wiki has a good explination: http://en.wikipedia.org/wiki/Rotary_woofer
And the ‘box’ they use is the size of your house. From the small box the actual ‘fan’ is mounted in, a baffle runs from the listening room, all the way to up the attic and uses that volume of air in that total system to create enough sound pressure for infrasonic sound.
Just waving your hand back in forth in the air produces infrasonic sound, but at extremely low pressures. You could change the frequency and characteristics of the sound waves by adjusting the pitch of your fingers and the speed you move your hands at. SO, this rotary woofer is doing the samething except its moving a massive quantity of air through its blades to produce the 120dB+ sound pressures.
about 3 years ago
A) Do you really think that you need that much improvement in a church in the 0-10Hz range? I mean it looks like it doesn’t do as well a job as normal subs in the 40-150Hz range…which you would probably use more right?
B) Does your church have an attic or room they are willing to dedicate for this?
about 3 years ago
A) Well yea, there are 3 ‘notes’ in the 0-10hz range on an organ. So by leaving those out, that automatically limits the instruements capabilities. All I have to say is step into cathedreal with 100+ rank organ blasting away with all stops drawn. Absolutly nothing can touch that FEELING. Thats the current limitation of current digital implementations, they (can) sound like cheap $2 fisher price keyboards. You need systems like this to recreate every detail of the real deal.
B) They’re building a 60k square foot building….space isn’t an issue lol