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Sound System Simulates the Roar of a Rocket Launch

samzenpus posted about 10 months ago | from the can-you-hear-anything-now? dept.

Technology 113

retroworks writes "Located in Noordwijk, Netherlands, and part of ESA's ESTEDC Test Center, is the Large European Acoustic Facility (LEAF), a sound amplification system 'powerful enough to kill a human being.' LEAF is capable of generating more than 154 decibels, the sound equivalent to standing next to several jets taking off. It is used to blast satellites and spacecraft with sound. Large horns are housed in a sound-proofed room that is 16.4meters tall. One wall of horns stands 11 m wide by 9 m deep and 16.4 m high. LEAF requires all the doors to be closed, operating in steel-reinforced concrete walls to contain the noise. The walls are coated with an epoxy resin to reflect noise, producing a uniform sound field within the chamber."

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the real question is (5, Funny)

Anonymous Coward | about 10 months ago | (#46135685)

can it go to 11?

Re:the real question is (3, Funny)

Ellis D. Tripp (755736) | about 10 months ago | (#46135743)

Sounds like this one might go up to 12 or more...and is large enough that it won't be trod on by a dwarf.

Re:the real question is (1)

flyneye (84093) | about 10 months ago | (#46136621)

Big deal, Black Flag already been there and did that back in the 80s.
Rockets have a ways to go to catch up.

Re:the real question is (1)

Anonymous Coward | about 10 months ago | (#46135823)

The real question is can we lock the US Congress in it and turn it up to 11.

Re:the real question is (3, Funny)

binarylarry (1338699) | about 10 months ago | (#46135885)

Since it's sound proof (and hopefully sealed air tight) lets just lock them inside and call it a day.

Re:the real question is (0)

Anonymous Coward | about 10 months ago | (#46136051)

The real question is who did that soundproofing?!
It sounds like what I need for the ultimate home theater.

Re:the real question is (0)

Anonymous Coward | about 10 months ago | (#46138449)

God: Was it worth it?
Anon: FUCK YES!

Re:the real question is (3, Funny)

Demonoid-Penguin (1669014) | about 10 months ago | (#46136115)

can it go to 11?

(sigh) bloody Slashdot posters.... If you bothered to read the referenced article you'd see it starts at 11. [mutter, mutter].

Re:the real question is (1)

Chemisor (97276) | about 10 months ago | (#46136637)

Whether it goes to 11 or not, it better have a 1/4 jack for Marty McFly to plug a guitar into.

Re:the real question is (2)

RivenAleem (1590553) | about 10 months ago | (#46139405)

And can it blow the cloths off girls?

And can it blow the cloths off girls? (0)

Anonymous Coward | about 10 months ago | (#46139551)

I understand that it can blow the skin off girls....

I need this in my car for Hip-Hop music. (0)

Anonymous Coward | about 10 months ago | (#46135691)

Gimme.

Questions not addressed in the summary (4, Funny)

pushing-robot (1037830) | about 10 months ago | (#46135711)

1. Can it play Van Halen?

2. How can I have one installed in my living room?

Re:Questions not addressed in the summary (1, Funny)

140Mandak262Jamuna (970587) | about 10 months ago | (#46135723)

Of course I wish you could install it in your living room. Given that the volume can kill a person, it is going to be more like dying room. But, please be my guest. Once all these noise obsessed people have knocked themselves out of the genepool, real music might emerge someday.

Re:Questions not addressed in the summary (5, Funny)

pushing-robot (1037830) | about 10 months ago | (#46135735)

They don't call it Death Metal for nothing, you know.

Re:Questions not addressed in the summary (0)

Anonymous Coward | about 10 months ago | (#46135979)

Vaginal Jesus [youtube.com] is my favorite Death Metal band.

-- Ethanol-fueled

Re: Questions not addressed in the summary (5, Funny)

jd2112 (1535857) | about 10 months ago | (#46136055)

Death metal? This thing has Disaster Area written all over it. They must be scheduled for a gig on Earth soon!

Re: Questions not addressed in the summary (2)

snakeplissken (559127) | about 10 months ago | (#46136519)

This thing has Disaster Area written all over it. They must be scheduled for a gig on Earth soon!

the sound stage will be on earth, the band of course, will be on the moon!

Re: Questions not addressed in the summary (1)

Erik WP (3406995) | about 10 months ago | (#46138377)

Nope, they will be orbiting Mars

Re: Questions not addressed in the summary (1)

LookIntoTheFuture (3480731) | about 10 months ago | (#46136951)

They must be scheduled for a gig on Earth soon!

I have 32 gig in my home server. Oh wait, nevermind.

Re:Questions not addressed in the summary (1)

jones_supa (887896) | about 10 months ago | (#46135935)

Of course I wish you could install it in your living room. Given that the volume can kill a person, it is going to be more like dying room.

Heh! Well played.

Re:Questions not addressed in the summary (4, Informative)

ShanghaiBill (739463) | about 10 months ago | (#46135953)

Given that the volume can kill a person ...

Can it really? They say it is as loud as several jets taking off. I have been on aircraft carriers where the flight crews were in close proximity to jets taking off, and none of them died as a result of that. According to this chart [purdue.edu] noise around 150dB can rupture an eardrum in someone wearing no hearing protection. Ruptured eardrums are rarely fatal.

Re:Questions not addressed in the summary (1)

cheater512 (783349) | about 10 months ago | (#46136007)

Decibels are a logarithmic scale, not linear. 154 decibels are over twice as powerful as 150 decibels.

Re:Questions not addressed in the summary (1)

jones_supa (887896) | about 10 months ago | (#46136089)

But human hearing is logarithmic, again.

Re: Questions not addressed in the summary (5, Insightful)

Anonymous Coward | about 10 months ago | (#46136285)

You don't die from hearing it, you die from feeling it. So twice as powerful as what it takes to rupture ear drums is in the range of rupturing capillaries in your whole body. Internal bleeding in the brain is a quick killer.

Re: Questions not addressed in the summary (3, Informative)

dwater (72834) | about 10 months ago | (#46137907)

Having experienced the Notting Hill Carnivan, I can totally believe this...the sound systems they have on the floats are so loud I found it quite difficult to even breath and started to make me feel sick. They're powered by quite big generators on the floats themselves....quite nuts.

The floats/etc were a bit boring, imo. My wife and I didn't stay long.

I find that they can reach 140db: http://www.theinformationdaily... [theinformationdaily.com]

Re:Questions not addressed in the summary (0)

Anonymous Coward | about 10 months ago | (#46136509)

Human hearing is more complex than that. There are different sensitivities, and response ranges, for different frequencies, and there's a reasonably effective automatic gain control. (It's also why so many electronic automatic gain control circuits make things sound like crap, especially in hearing aids: they really distort the sound on top of all the other distoritions.) It's not a linear response, but it's not a good logarithmic curve, either.

Depending on frequencies, that level of sound will echo in and damage hollow tissue lungs, and empty chambers of the pharynx. You *bleed* and suffocate to death as the blood accumulates in your breathing vessels faster than it can be removed, a particularly gruesome form of pneumonia.

Re: Questions not addressed in the summary (0)

Anonymous Coward | about 10 months ago | (#46136137)

Sadly, the number of guys dying as a direct result of being in close proximity to aircraft is much higher than you report.
Not being able to hear a damn thing in a high risk environment is, uh deadly.
Sorry, for being a pedantic prick, but at some point people should train to express themselves. Because depending on how you put words next to each other, changes the meaning. I put a typo in there somewhere to make you feel better.

Re: Questions not addressed in the summary (1)

Dunbal (464142) | about 10 months ago | (#46140145)

Not being able to hear a damn thing in a high risk environment is, uh deadly.

WHAT?

Re:Questions not addressed in the summary (1)

Andhesaidtome (2738249) | about 10 months ago | (#46136563)

TFS says jets, TFA says rockets. I don't think I'd want to be next to multiple rockets (or even one thanks).

Re:Questions not addressed in the summary (1)

DarwinSurvivor (1752106) | about 10 months ago | (#46136009)

Given that the volume can kill a person, it is going to be more like dying room.

The irony, it BURNS! [wikipedia.org]

Re:Questions not addressed in the summary (1)

PopeRatzo (965947) | about 10 months ago | (#46136227)

Once all these noise obsessed people have knocked themselves out of the genepool, real music might emerge someday.

And that day, Perry Como will re-take his rightful place in the pantheon, right?

Re:Questions not addressed in the summary (0)

Anonymous Coward | about 10 months ago | (#46138085)

Very nice!

more important (0)

Anonymous Coward | about 10 months ago | (#46135917)

Does it run Linux?

Maximum Rock And Roll (1)

Frosty Piss (770223) | about 10 months ago | (#46135715)

This would have been awesome back in the days of Punk...

Re: Maximum Rock And Roll (0)

Anonymous Coward | about 10 months ago | (#46135745)

Needs to be connected to a stratocaster so it can become the real thing

Re: Maximum Rock And Roll (0)

Anonymous Coward | about 10 months ago | (#46135835)

One of them has to have tried this already

It's only a matter of time... (5, Funny)

narcc (412956) | about 10 months ago | (#46135717)

...before this is stolen and installed in a '94 honda civic.

Re:It's only a matter of time... (0)

Anonymous Coward | about 10 months ago | (#46139817)

It could replace the engine, if the wheels don't fail.

WHAT????? (1)

Anonymous Coward | about 10 months ago | (#46135725)

WHAT DID YOU SAY??????

Oh, you mean my neighbors (0)

Anonymous Coward | about 10 months ago | (#46135739)

Thanks to cheap electronics and even cheaper materials, every hood rat now has three subwoofers in their apartment, all next to mine.

Re:Oh, you mean my neighbors (1)

crutchy (1949900) | about 10 months ago | (#46135783)

it's all part of the new SETI@home project... blast the aliens with annoying sound till they come tell us to shut the hell up cos even though space is a vacuum they can still hear us (due to the "star wars space sound travel phenomenon")

One of the first customers (5, Funny)

rossdee (243626) | about 10 months ago | (#46135741)

Hotblack Desiato and his band Disaster Area

Re:One of the first customers (2)

fahrbot-bot (874524) | about 10 months ago | (#46135763)

Hotblack Desiato and his band Disaster Area

With *everything* painted black, of course.

Re:One of the first customers (1)

dwater (72834) | about 10 months ago | (#46137927)

" ``It's the wild colour scheme that freaks me,'' said Zaphod whose love affair with this ship had lasted almost three minutes into the flight, ``Every time you try to operate on of these weird black controls that are labelled in black on a black background, a little black light lights up black to let you know you've done it. What is this? Some kind of galactic hyperhearse?''

The walls of the swaying cabin were also black, the ceiling was black, the seats --- which were rudimentary since the only important trip this ship was designed for was supposed to be unmanned --- were black, the control panel was black, the instruments were black, the little screws that held them in place were black, the thin tufted nylon floor covering was black, and when they had lifted up a corner of it they had discovered that the foam underlay also was black.
"

Re:One of the first customers (1)

physicsphairy (720718) | about 10 months ago | (#46135851)

My neighbors will want one, too, but they might just rent one because they'll only need it around 4am on Saturdays.

154dB is not fatal, or unusual (3, Interesting)

mpoulton (689851) | about 10 months ago | (#46135757)

Car audio competitors exceed 154dB all the time. That's not even close to the sound pressure levels achieved in world-class competitions: http://www.youtube.com/watch?v... [youtube.com] That's 28.5dB louder than this testing facility, a factor of 707 times more power.

Re:154dB is not fatal, or unusual (0)

Anonymous Coward | about 10 months ago | (#46135803)

exactly what i thought, i used to engineer a 30K soundsystem and we had a government inspector (notting hill carnival '93) tell us to turn it down because we where peaking at 163db.

makes you wonder if they have to lie about what this rig can do what else are they lying about ?

Re:154dB is not fatal, or unusual (2)

Sparohok (318277) | about 10 months ago | (#46135909)

"because we where[sic] peaking at 163db"

No actually you weren't.

Just because the meter says it doesn't mean its true.

Martin

Re: 154dB is not fatal, or unusual (-1)

Anonymous Coward | about 10 months ago | (#46135999)

just because you're a denialist doesn't mean global warming isn't true.
but what is true, is that ANY slashdot topic can erode to a global warming spamfest.

Re: 154dB is not fatal, or unusual (0)

Anonymous Coward | about 10 months ago | (#46136935)

It's not "can". It's "will".
And it's not global warming, it's Hitler.

Godwin's law and all that...

Re:154dB is not fatal, or unusual (1)

Dunbal (464142) | about 10 months ago | (#46140163)

The fact that the government gets billed $15 million every time it's used to test a satellite when the actual testing cost is $130 and a half dozen doughnuts?

Re:154dB is not fatal, or unusual (4, Interesting)

Sparohok (318277) | about 10 months ago | (#46135839)

Car audio competitors exceed 154db:
* In a very small enclosed space (not a 16 meter room large enough to test spacecraft)
* With an acoustic design to focus sound on the microphone (not intended to create a uniform soundfield)
* For just a few seconds before the speaker voice coils melt
* At a very small range of bass frequencies
* Strictly without nobody inside the car to avoid certain injury - or perhaps even death, we have no way to know

154db may not be unusual but what the LEAF facility is doing certainly is unusual.

Martin

Re:154dB is not fatal, or unusual (3, Interesting)

mpoulton (689851) | about 10 months ago | (#46136069)

That's all certainly true. The facility is very impressive. Not because of the 154dB number, but because of all the other engineering factors involved. There's no doubt that the total amount of power involved is way higher than any audio system, and that it would be very unhealthy to stand in the box. It's just a bit odd and misleading to tout the SPL number as somehow being really impressive, when the chav blasting his ridiculous stereo at 3AM may be in the same dB ballpark.

Re:154dB is not fatal, or unusual (0)

Anonymous Coward | about 10 months ago | (#46135847)

Car audio competitors exceed 154dB all the time. That's not even close to the sound pressure levels achieved in world-class competitions: http://www.youtube.com/watch?v... [youtube.com]

That's 28.5dB louder than this testing facility, a factor of 707 times more power.

Decibels relative to what? Maybe not ambient...

Re:154dB is not fatal, or unusual (2)

mpoulton (689851) | about 10 months ago | (#46136087)

Car audio competitors exceed 154dB all the time. That's not even close to the sound pressure levels achieved in world-class competitions: http://www.youtube.com/watch?v... [youtube.com]

That's 28.5dB louder than this testing facility, a factor of 707 times more power.

Decibels relative to what? Maybe not ambient...

Sound pressure level is measured relative to 1dB (duh), which is typically defined as 20uPa.

Re:154dB is not fatal, or unusual (0)

Anonymous Coward | about 10 months ago | (#46136457)

>>Sound pressure level is measured relative to 1dB (duh), which is typically defined as 20uPa.

Sound pressure can be measured relative to 20uPa if you want. In that case 0dB would be 20uPa. Not 1dB... duh

Re:154dB is not fatal, or unusual (1)

Dozy Lizard (1708728) | about 10 months ago | (#46136475)

Um ... relative to 0dB ...

Re:154dB is There is more to not fatal, or unusual (0)

Anonymous Coward | about 10 months ago | (#46135857)

There is a lot more going on in that room than just decibles. Decibles are a relative measurement, not absolute. The decibles it putting out are MUCH more powerful than anything an audio system can produce.

Re: 154dB is There is more to not fatal, or unusua (0)

Anonymous Coward | about 10 months ago | (#46136103)

Whatever you just said is not what you were taught.
Whatever you learned was not physics, or even math.

Re:154dB is not fatal, or unusual (0)

Anonymous Coward | about 10 months ago | (#46135955)

Did you see how they bolted the door closed on that truck? They used impact wrenches to unbolt the door! That doesn't mean it would otherwise be fatal, but it certainly sounds like it would be dangerous.

Of course, the "no human could survive" doesn't necessarily mean it would kill you, just that you would not come out unscathed. I am sort of curious what might happen if somebody were accidentally subjected to that SPL for the duration of a rocket launch to see exactly what the damage might be.

dom

Re:154dB is not fatal, or unusual (2)

gishzida (591028) | about 10 months ago | (#46136155)

I once had the opportunity to witness a night time test firing of an Atlas rocket engine set [three engines] at the Rocketdyne Santa Susanna Field Test Lab. We were put in an observation area at a distance of 3/4 of a mile away from the test stand. The test was about thirty seconds long. The sound pressure from the engines compressed the diaphragm enough to make breathing difficult or impossible.

Imagine trying to take a breath and you find you are unable to do so all the while you are hearing an impossibly loud roaring and the flashing brightness of the engines bathing the hills with yellow-white light.

It was the nearest I ever got to an actual ride into space... it was impressive and I found myself wanting "to go on that ride again" but never had the opportunity.

Re:154dB is not fatal, or unusual (2)

Trogre (513942) | about 10 months ago | (#46136795)

You found breathing difficult from 3/4 mile away?

That is impressive. The sound pressure 1m from the rocket must have been incredible, and well in excess of 154dBA I would guess!

Re:154dB is not fatal, or unusual (0)

Anonymous Coward | about 10 months ago | (#46135961)

A car is not an enclosed space. Even with the doors closed.

Re:154dB is not fatal, or unusual (0)

Anonymous Coward | about 10 months ago | (#46136129)

Whale song goes to 189 dB, apparently.

Re:154dB is not fatal, or unusual (1)

pz (113803) | about 10 months ago | (#46136151)

It's one thing to do that inside a car (which is what, 6 x 4 x 9 feet ... or maybe a little larger than that?). It's quite another to do it inside a huge room that's 36 x 30 x 54 feet in size. It's also worth noting that car audio competitions use a single frequency. The LEAP facility is broadband, since it needs to simulate the sound of a launching rocket.

Re:154dB is not fatal, or unusual (1)

Trogre (513942) | about 10 months ago | (#46136617)

Yes I also thought that 154 dB, assuming they're using dBA, seemed a little low to be considered fatal. Wikipedia's table of sound pressure levels claim that rocket acoustic tests typically operate at around 165dB.

Not a big deal... (Sqore:200,000, Shear Delight) (0)

Anonymous Coward | about 10 months ago | (#46135805)

...I had one installed in my car recently.

C = 'grisley'

this is not a test (0)

Anonymous Coward | about 10 months ago | (#46135859)

simulation nation it's the landing that hurts http://www.youtube.com/results?search_query=citizen%20missiles%20targets&sm=3

results never vary http://www.youtube.com/watch?v=mk9mV8qBiEk

Confessions Of an Ex-SLASHDOT BETA user (4, Insightful)

Anonymous Coward | about 10 months ago | (#46135893)

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Re:Confessions Of an Ex-SLASHDOT BETA user (0)

Anonymous Coward | about 10 months ago | (#46136045)

When people decided to favor forums where the behavior and presentation is controlled in one central place (web forum) instead of one where each person controls their own and can use a reader software of their choice, that's what happens: you are subject to someone else's whims about what behavior you reader should have.

Re:Confessions Of an Ex-SLASHDOT BETA user (0)

Anonymous Coward | about 10 months ago | (#46138297)

Hello AC here! I'm using old Opera and never seen /. beta. I guess I'm better off that way.

Re:Confessions Of an Ex-SLASHDOT BETA user (1)

hankwang (413283) | about 10 months ago | (#46138689)

"I'm still being redirected to SLASHDOT BETA"

Poor you. Try http://slashdot.org/?nobeta=1 [slashdot.org] .

Missed headline opportunity (4, Funny)

wonkey_monkey (2592601) | about 10 months ago | (#46135895)

Sound system simulates strident sonics of soaring space ships

powerful enough to kill a human?? mythbusters (3, Funny)

Joe_Dragon (2206452) | about 10 months ago | (#46135981)

powerful enough to kill a human?? sounds like the mythbusters need to test this!!

Re:powerful enough to kill a human?? mythbusters (2)

lagomorpha2 (1376475) | about 10 months ago | (#46136605)

They should get Kari Byron to test it to see if they're so loud, they blow women's clothes off!

Re:powerful enough to kill a human?? mythbusters (0)

Anonymous Coward | about 10 months ago | (#46140857)

While that might be nice and all, the fact that it uses uniform sound means that there is not likely to be any pressure differential to do so.

Just imagine it for yourself.

This sound testing facility will be shut down! (0)

Anonymous Coward | about 10 months ago | (#46135987)

I will shut down this Atreides Testing Facility! And the whole universe will know what I, Barron Vladimir Harkonan, rules Dune!!!!

The 70s called (0)

Anonymous Coward | about 10 months ago | (#46136005)

They want their Sensurround back.

Pfttt... (1)

Hamsterdan (815291) | about 10 months ago | (#46136067)

That's nothing compared to what my neighbors use in their living room...

been there done that (0)

johnwerneken (74428) | about 10 months ago | (#46136075)

at tech we had parabollic 4 story bldg. with enuf 1000 watt a channel systems could rattle windows may miles away. before nasa could lol.

One such facility... of many (0)

Anonymous Coward | about 10 months ago | (#46136387)

This is not terribly new; every satellite has to undergo acoustic test in a facility that similates the noise of a rocket launch. There are many such facilities.
  https://www.google.com/search?... [google.com]

hmmm... (1)

ComputersKai (3499237) | about 10 months ago | (#46136503)

...capable of generating more than 154 decibels, the sound equivalent to standing next to several jets taking off....

Or the equivalent of mentioning Obamacare to Congress

Shows how inefficient rockets are. (0)

Anonymous Coward | about 10 months ago | (#46136865)

They convert a lot of energy into sound, heat and smoke, which
we then copy to make more wasted energy.

Re:Shows how inefficient rockets are. (2)

50000BTU_barbecue (588132) | about 10 months ago | (#46137515)

You'd be surprised at how little energy is needed for sound to be spectacular.

http://www.sengpielaudio.com/T... [sengpielaudio.com]

Whether or not your speakers are efficient at transforming electrical power into acoustic power is another story. If you can lift your speakers by hand, your efficiency is maybe 1% if you're lucky.

Seems a waste (0)

Anonymous Coward | about 10 months ago | (#46136977)

When a 3 axis shaker will make it see every g force frequency exactly and has worked fine for every single thing we ever put into space.

At a much more convenient lab equipment and cost.

At some place like Wyle Labs Elsegundo Ca.

Glenn Research Plum Brook has one that goes to 163 (1)

Anonymous Coward | about 10 months ago | (#46137475)

This is nice and all, but NASA built one of these for their Plum Brook Glenn Research Center that goes to 163dB.
wiki article [wikipedia.org]

Next milepost .... (1)

PPH (736903) | about 10 months ago | (#46137555)

.... Seahawks fans.

can I have a (0)

Anonymous Coward | about 10 months ago | (#46137825)

Beowulf cluster of these?

move to Venus (3, Interesting)

troon (724114) | about 10 months ago | (#46138687)

The maximum SPL on Earth is a trifling 193dB: the point at which the negative peak of the compression wave is a total vacuum.

Move to Venus with its 90atm ambient "air" pressure, and you could get up to 233dB!

Seriously, if you live near me and like thumping bass in your car, move there now! Ignore all that propaganda about high temperatures and acid rain... 233dB!!!

In space no-one can hear you scream. (1)

mrthoughtful (466814) | about 10 months ago | (#46139053)

The obvious interpretation, that this device blasts satellites and spacecraft while they are in space, is impossible. Actually all sorts of things (including the aforementioned) are placed into a chamber for sonic vibration testing. Satellites are tested this way for launch-worthiness, not space-worthiness.

Roger Ramjet (0)

Anonymous Coward | about 10 months ago | (#46139283)

LEAF is capable of generating more than 154 decibels, the sound equivalent to standing next to several jets taking off

Got to be a Roger Ramjet joke in here somewhere.

Underwater version? (1)

cameloid (120654) | about 10 months ago | (#46139887)

Can this be installed in a nuclear submarine and transported to the Marianas Trench?

Been around forever (1)

judoguy (534886) | about 10 months ago | (#46140335)

My father was an EE for Western Electric and Bell Labs. Way back in the day, he worked on inertial guidance systems for ICBMs.

He told me about the shaker table they used to simulate boost phase. It used a 500 watt McIntosh amp as the pre-amp driving several foot tall water cooled tubes, (valves for our British friends) as the output devices.

I've always wanted a setup like that for my sub-sub-sub--woofer.

NASA RATF (0)

Anonymous Coward | about 10 months ago | (#46140697)

From http://spaceflightsystems.grc.nasa.gov/EFDPO/LCSO/MPCV/SPF/

"Reverberant Acoustic Test Facility (RATF)

The RATF, the most powerful acoustic test chamber in the world, will be a steel-reinforced-concrete chamber located in a high bay adjacent to the thermal-vacuum chamber and will be able to physically accommodate a test article nearly 33 ft in diameter. When the Orion vehicle is accelerated through the atmosphere, it will experience extreme aeroacoustic forces. To simulate this environment, sound power will be supplied to the chamber via 23 nitrogen-powered servohydraulic acoustic modulators to reach an overall sound pressure level of 163 decibels in the empty chamber—seven times more powerful than standing next to a jet engine or a Formula 1 race car."

Get that noise maker off my lawn (1)

thogard (43403) | about 10 months ago | (#46141365)

I could still hear the Saturn V when the 1st stage dropped off. It had lovely base with a crackling. Figuring speed of sound, vs speed of light and wind and sound drop off over distance, I suspect this thing isn't that loud.

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