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Old 2nd December 2011, 12:47 PM   #21
DrDyna is offline DrDyna  United States
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Quote:
Originally Posted by Don Hills View Post
If you just want to experience it:
- Build an enclosure large enough to sit in, say 3 feet wide x 5 feet high x 6 feet long (90 cubic feet).
- Cut a hole in the end and screw on a single 15 inch driver, assuming xmax is at least 1/2 inch.
- Add a couple of small speakers to handle the rest of the frequency range.
- Climb in. Seal the door. Play your music.
I did this once, the level was almost unbearable with the volume barely off the pin.

Should we really be participating in assisted suicide? Here's an idea with that budget:

Maybe a huge Infinite Baffle array would be something you could look into? Maybe a couple dozen Fi IB318s. Build a wall around the inside of your room so that it has a 4 foot gap all the way around the edge and then mount 4 pairs of drivers in each wall. Stick a Behringer EP4000 on each pair and get ready to have an audio induced stroke.

With that budget though, I'd probably spend half of it on infrastructure. You're probably going to waste a lot of energy to building structure if the room wasn't designed to be able to contain that much energy.

Maybe an old nuclear bunker?
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Old 2nd December 2011, 01:13 PM   #22
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Quote:
Originally Posted by running123 View Post
Reason for this question...I just want to experience it. Going to use it in a much larger room later for dubstep. Some songs like firepower by datsik actually drop that low. Was hoping there would be an easier way of doing it like a few pd 24inch drivers in a horn or something...
If this is just a desired experience there is a quite cheap way to do it, but your timing is most unfortunate...you missed the most recent window just 5 months ago and the next one is at least 4 years away although admittedly somewhat indefinite. Here's the plan:
  • Buy yourself a round trip 1st Class ticket London to Orlando, FL ($4,000)
  • Rent a 1st class car for the week ($700)
  • Get the best hotel room in the area for a week ($1,200)
  • Donate to a Congressperson to get VIP Access ($10,000)
  • Use your newly bought influence to get within 4km of pad.
  • Watch the 1st launch of the next generation Space Transportation System w/o ear protection (sound level estimated as similar to Saturn V)

You get the experience, avoid reconstructing your home, and the bill totals under $16,000 excluding golf greens fees and Disney World tickets!
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Old 2nd December 2011, 01:29 PM   #23
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Ohhh...even cheaper - fly to the nearest country where automatic firearms are available (rental at US gun ranges is no problem) and allowed to be used. Get an M16A2 ($75 an hour + a few $100 for ammo depending on how much experience you want) equipped with softer mainspring reducing the cyclic rate of fire to 300 rounds per minute (5Hz). Each 30 round clip will give you 6 seconds at 5Hz. The peak SPL is reported to be 155dB at 4m so I would expect the average to be well above your 125dB target in an indoor range. Should get the job done for $5,000 including 1st class air & hotel. May need some bribe money so the range officer will let you shoot w/o ear protection!
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Old 2nd December 2011, 06:12 PM   #24
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I was going to say,
"didn't we just go over this in another thread"?
Considering the roll off from 30Hz that's about 145db overall right? he,he,he

jer
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Old 2nd December 2011, 06:18 PM   #25
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Quote:
Originally Posted by geraldfryjr View Post
Considering the roll off from 30Hz that's about 145db overall right? he,he,he
That's what EQ is for - so he doesn't blow his ears up with the higher frequencies.
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Old 2nd December 2011, 08:06 PM   #26
18Hurts is offline 18Hurts  United States
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If you just want to hear what it sounds like, get some headphones that are rated to 5Hz. Sony makes them and although I doubt they won't go much over 100dB--you can "hear" what it sounds like.

Would I want to play 5Hz at 125dB with headphones? I played the cannon shots once on 10Hz rated Audio Technicas back in the day--once. It didn't blow the phones but the 1812 Overture sure packed a kick.

I'd spend 1/10th of 1% of my budget and get some headphones to hear if you want to continue on your quest.
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Old 2nd December 2011, 08:17 PM   #27
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Quote:
Originally Posted by 18Hurts View Post
If you just want to hear what it sounds like, get some headphones that are rated to 5Hz. Sony makes them and although I doubt they won't go much over 100dB--you can "hear" what it sounds like.

Would I want to play 5Hz at 125dB with headphones? I played the cannon shots once on 10Hz rated Audio Technicas back in the day--once. It didn't blow the phones but the 1812 Overture sure packed a kick.

I'd spend 1/10th of 1% of my budget and get some headphones to hear if you want to continue on your quest.
i dont want to hear it i want to feel it..and listen to music on a system capable of playing it
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Old 2nd December 2011, 08:33 PM   #28
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There is one problem with playback under 15hz at 120db, you won't really feel it as much as you will be listening to the room shake and flex (flight response... run away, (Think Monty Python)) so unless you are willing to build a concrete bunker.... their are going to be problems other than building the speakers.

edit: oh yeah, it will also make you nauseous. My reference system is flat to 14Hz and it makes most people (me included) sick if tones under 20Hz are being reproduced at above 90db for more than just a blast in a movie, a sustained 16Hz messes with your inner ear.

Last edited by revboden; 2nd December 2011 at 08:41 PM.
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Old 2nd December 2011, 08:59 PM   #29
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There are commercial infrasonic weapons designed to make you want to hurl or poop, but they don't have much effective distance. You can see them on TV in use by the Japanese whalers against the volunteers trying to interfere with "illegal" whaling. Not effectve ship-to-ship.
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Old 2nd December 2011, 09:00 PM   #30
Djim is offline Djim  Netherlands
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Talking about sustain, I don't think you want to trap that kind of energy, not even within concrete bunkers! <10Hz will cause sustains within the concrete, so imo heavily damped flexing walls are a more practical solution (think of boomcars where most LF energy goes outside the car). That's besides the point these ultra LF wave have no room to develop in a concrete bunker (unless you buy a factory) to produce a 'clean' signal....
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