| theChris |
from another forum someone was bragging about a SPL of 189dB and that the record was 243dB (one time) or 273dB.
i was wondering, what would be required to acheive an SPL of 273dB?
would a small neuclear explosion be enough?
i mean that's an pretty large intensity, unless you redefine 0dB... |
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| DSP_Geek |
| quote: | Originally posted by theChris
from another forum someone was bragging about a SPL of 189dB and that the record was 243dB (one time) or 273dB.
i was wondering, what would be required to acheive an SPL of 273dB?
would a small neuclear explosion be enough?
i mean that's an pretty large intensity, unless you redefine 0dB... |
Well, considering 0 dB is 20 micropascals, an atmosphere is 100 kPa, that implies one atmosphere of sound pressure is about 194 dB. I call bull**** on the first. So, continuing from this, 243 dB implies an overpressure of 300 atmospheres, and 273 dB 10,000 atmospheres. Titan missile silos are designed for 1000 psi (70 atmospheres), and they're supposed to withstand a direct hit from a nuclear strike.
You can figure out whether this person is worth talking to further. :whazzat:
Francois. |
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| Hayden |
what forum?
273 dB that is bull
the record is just over 180db
try a nuke;)
somthing like this |
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| theChris |
| oh no, i was just curious what kinda thing could possibly do that. i was thinking a large explosion's shockwave at almost point blank would be the best way to do this. |
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| rcavictim |
| A starquake ought to do it! |
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| tschrama |
| Lanching a Saturn space rocket is reported to come close to the theoretical maximaum of 194dB.... |
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| tschrama |
| BTW... sea mamals and submarines etc tend to make more SPLs in water... possible above 200db? but that's a whole different game and has a different meaning.... |
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| Hayden |
A hypernova is the most destructive force (explosion) in this
Universe may be it can produce that amount of db
A hypernova can wipe out thousands of galaxies:bigeyes: :dead: |
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| Dingle |
| I just want to know what kind of test equpment these people that mesured the 200+ db were using. |
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| eRiCdWoNg |
Very interesting- I call BS as well.. however this would be interesting to see who can break the 200 dB mark. Just like in drag racing 200 MPH trap speed seems to be a right of passage, at least for amateur drag racers. Whats the record now? high 170s? 180s? Its "only" 20 more db to go /100x more power haha.
Its definately possible- with- enough woofers and enough amplifiers and enough power. Wonder how many pro-audio mega amps are sitting in the warehouses of Crown, QSC and Crest. Then take a few thousand enclosures made by the pro audio companies or car audio companies and let her loose! Then we can move more air then 16 747 motors! |
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| Dingle |
| i noticed that none of you guys have mentioned digital design in your recomendations for the loudest woofer here on the forums. you guys may want to check them out. ultra mega quality and the coolest thing about them is they are completely hand built in the usa.( and when i say hand built i mean hand built not a single gluing machine in the whole place) www.ddaudio.com |
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| tsmith1315 |
| quote: | | Lanching a Saturn space rocket is reported to come close to the theoretical maximaum of 194dB.... |
SaturnV: 160 million HP.
At launch, dust was shaken off the ceiling tiles in the control room 3½ miles away, and seismometers in Asia could read the disturbance.
Tim |
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| setmenu |
Hmmm, 200db in an 'enclosed' space...
Asuming moving coil transducers are not compulsory in the rules...
How about taking a leaf out of the missile silo designers book and
building your enclosure suitably robust [and vented:eek: ] so one
can try something like directing the exhaust of a liquid fuel rocket
motor into the enclosure and modulate the 'throttle' with the relevant test tone.
That ought to produce a hell of racket!
One of the main hurdles here would be to actually throttle the motor, they can be touchy things....Boom:dodgy:
The sound would be lovely and rich in harmonics too.;)
Setmenu:clown: |
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| theChris |
heh, its a twist on the slogan for the cerwin vega stroker...
it's like a neuclear blast. seriously, it will kill all life within a 10 mile radius as you drive by... |
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| tsmith1315 |
| quote: | | One of the main hurdles here would be to actually throttle the motor |
Another touchy aspect would be Newton's 3rd Law. Whatever may be attached to the motor would tend to take a fast ride.
But seriously, the energy input needed to generate such high SPL's wouldn't befit the standard "electrical current produced by moving a magnet through a coil of wire" idea of an alternator.
Maybe a nuclear powerplant under the hood would be a good start?
Tim |
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| theChris |
| even with a 100% efficient speaker radiating directly onto a 1 cm^2 area, you would still need over 100 GW to get to 273dB. at least from what i can tell... thats a fairly good amount of power... |
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| purplepeople |
It only needs one point twenty one jigga watts powering a flux capacitor to a speed of eighty miles an hour.
This is way to funny for middle of the night...
:)ensen. |
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| setmenu |
| quote: | Originally posted by tsmith1315
Another touchy aspect would be Newton's 3rd Law. Whatever may be attached to the motor would tend to take a fast ride.
Tim |
As the motor would be exhausting into an 'enclosed' chamber one
could place the vents to keep the thing stable [vectored thrust].
As a side note ,I was told a while back that some very small rocket motors were producing their highest spls around 20khz+
figures of 168db+ were mentioned.[if I recollect correctly]
Imagine that.....:eek: :eek:
My favorite loud machines are top fuel drag racers, spectating one of these things is a very physical experience!
I use ER 20 musicians ear plugs to protect my ears and maintain
the sound quality..hehe.
Setmenu |
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| peranders |
| quote: | Originally posted by theChris
from another forum someone was bragging about a SPL of 189dB and that the record was 243dB (one time) or 273dB.
i was wondering, what would be required to acheive an SPL of 273dB?
would a small neuclear explosion be enough?
i mean that's an pretty large intensity, unless you redefine 0dB... |
A rule: Don't believe everything you hear....I would love to see proof of this 273 dB claim :nod: |
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| Brian Donaldson |
| Maybe inside the combustion chamber of a huge deisel engine, if you could stand the heat. |
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| peranders |
| Sure, but I think it was about sound pressure in free air. |
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| km |
hi.
>I just want to know what kind of test equpment these people that mesured the 200+ db were using.>
they measured 100 db with a tiny meter and thought it was twice as loud :)
"the loudest noise created in a laboratory is 210 db or 400,000 acoustic watts reported by NASA from a 48 ft (14,63m) steel and concrete horn at Huntsville, Alabama in oktober 1965....."
(from guiness book of records.1978)
best rgds - karsten madsen - cadaudio.dk |
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| AGGEMAM |
| I should note that some engineering equipment ment for cutting in concrete creates a spl of 194 db at 46 KHz at 1 mm distance. |
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| Hayden |
| Just use explosives.....might do it :bomb: :nod: |
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| ADS |
| quote: | Originally posted by AGGEMAM
I should note that some engineering equipment ment for cutting in concrete creates a spl of 194 db at 46 KHz at 1 mm distance. |
I'm sure those would make some great headphones... :bigeyes: |
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