How loud can we get?

[jer_stud56 10+ year member]

http://www.makeitlouder.com/Decibel%20Level%20Chart.txt

183 (P) = 6 P.S.I. TOTAL DESTRUCTION OF ALL STRUCTURES, PARTICLE VELOCITY(BLAST WIND) IS 180 MILES PER HOUR. 0.9 MILES FROM HIROSHIMA ATOMIC BOMB

AND 3.3 MILES FROM 1MEGATON NUCLEAR BOMB, LESS 0.1 % OBJECT SURVIVAL -REF.2.

185.75 (NP) 0.375 POUNDS OF T.N.T. RIECHTER -1.5

186.1(P) 1 POUND T.N.T AT DISTANCE OF 10 FEET -REF.4.

187 (P) 1 TON T.N.T. AT 100 FEET, EXACTLY 186.8 DB -REF.4.

 

[azimuth 5,000+ posts]

i lost my spleen in a vehicle hitting 165. came right out my pee hole.//content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

 

[SSS 18734 5,000+ posts]

http://www.makeitlouder.com/Decibel%20Level%20Chart.txt

That's what I was looking for, thanks //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[audioholic 5,000+ posts]

You guys need to remember microphones read air particle velocity, not psi. That is why you can get a substantial db reading with the mic in the port, or with windows open rather than closed, etc. Yet those situations dont cause the pressurizing damage that you refer to.

 

[manbeer 10+ year member]

i don't know if i would trust any scientific chart in which the word "intense" is spelled "intence" repeatedly

 

[azimuth 5,000+ posts]

i don't know if i would trust any scientific chart in which the word "intense" is spelled "intence" repeatedly

//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

 

[Ed Lester 10+ year member]

OK, anyone want an SPL lesson?

I have discussed this many times so you can probably just search for loudest possible sound or something.

But,

181.3dB is the loudest score ever achieved at an official SPL competition. done by Edge Audio in dB Drag Racing.

194dB is the loudest achievable "Sound" Anything over this will create an overpressure shockwave and will technically not be considered sound.

This is because 194 dB represents a perfect vacuum. Bot positive pressure and vacuum are created to make a sound wave.

Once there is a 100% vacuum, we can not increase the sound.

So any level above 194 dB will have more positive pressure as compared to vacuum so it will be distorted.

Explosions can reach levels almost up to 220 dB but it is not SPL.

185 dB represents about 1 atmosphere of pressure above current atmosphere during compression. This is theoretically the loudest that will be achieved using autosound equipment the way that we know it.

You can read dB in PSI as during compression there will be pressure applied.

I had a chart somewhere, once I find it, I will post it.

Some of us dB Draggers actually worked with the US Military to study the effects of SPL on the human body.

anything over 172 will burst capilaries in the human skin and you will start to bleed through your skin.

Your eyesight is temporarily lost at 165 and continued exposure will rupture bloood vessels in your eyes.

At 150 dB your heart skips a beat.

At about 160 your lungs cannot pull in air and continued exposure can suffocate you.

I forget the rest right now.

Many people sat in the Team Gates Bronco back then and didnt get hurt. One reason was because they never burped it at full power,

They also had people sit on the driver side which was 10 dB less then the passenger side, and the doors were usually open which dropped the SPL even further.

Also, That Bronco can only do a 163 or 164 on the new Term Lab.

 

[pman44 10+ year member]

^^ Very interesting insight you wrote there. Imagining bleeding through skin just makes me cringe. //content.invisioncic.com/y282845/emoticons/blackeye.gif.66a1670f5aaf7f406e783a63e3387dc5.gif

As far as someone sitting in a vehicle that produces high Sound Pressure Levels, I can totally picture David Blaine doing it.

He would setup a BassRace or DB Drag in Times Square and have everyone witness him survive and come out untouched in a van that hits upper 170's or 180.

Before he goes in I can picture him saying (in a monotone and serious voice):

"For my next metaphysical and supernatural encounter, I will step into the world's loudest vehicle and walk...out...pain-free...and with no...physical damage to my hearing. I will sit inside... for...2 days."

//content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif

 

[Ed Lester 10+ year member]

There was a guy that sat in Bob Perillos van during a 162 dB Bass race Run back in March.

He couldnt breathe or see for the full 30 seconds and then after the run, he could barely stand up.

He said he could feel the waves passing through his body and for about a week it felt as if he had broken ribs but it was actually internal bruising.

 

[DDeitz 10+ year member]

There was a guy that sat in Bob Perillos van during a 162 dB Bass race Run back in March.He couldnt breathe or see for the full 30 seconds and then after the run, he could barely stand up.

He said he could feel the waves passing through his body and for about a week it felt as if he had broken ribs but it was actually internal bruising.

that video was pretty nuts to watch, im honestly 100 percent amazed they let him

 

[SSS 18734 5,000+ posts]

OK, anyone want an SPL lesson?I have discussed this many times so you can probably just search for loudest possible sound or something.

But,

181.3dB is the loudest score ever achieved at an official SPL competition. done by Edge Audio in dB Drag Racing.

194dB is the loudest achievable "Sound" Anything over this will create an overpressure shockwave and will technically not be considered sound.

This is because 194 dB represents a perfect vacuum. Bot positive pressure and vacuum are created to make a sound wave.

Once there is a 100% vacuum, we can not increase the sound.

So any level above 194 dB will have more positive pressure as compared to vacuum so it will be distorted.

Explosions can reach levels almost up to 220 dB but it is not SPL.

185 dB represents about 1 atmosphere of pressure above current atmosphere during compression. This is theoretically the loudest that will be achieved using autosound equipment the way that we know it.

You can read dB in PSI as during compression there will be pressure applied.

I had a chart somewhere, once I find it, I will post it.

Some of us dB Draggers actually worked with the US Military to study the effects of SPL on the human body.

anything over 172 will burst capilaries in the human skin and you will start to bleed through your skin.

Your eyesight is temporarily lost at 165 and continued exposure will rupture bloood vessels in your eyes.

At 150 dB your heart skips a beat.

At about 160 your lungs cannot pull in air and continued exposure can suffocate you.

I forget the rest right now.

Many people sat in the Team Gates Bronco back then and didnt get hurt. One reason was because they never burped it at full power,

They also had people sit on the driver side which was 10 dB less then the passenger side, and the doors were usually open which dropped the SPL even further.

Also, That Bronco can only do a 163 or 164 on the new Term Lab.

That's pretty interesting. Thanks!

p.s. how exactly did you get the information as to what happens to the human body at various SPL levels?

 

[Rashaddd 5,000+ posts]

Ed, feel free to keep talking about this //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 

[Ed Lester 10+ year member]

That's pretty interesting. Thanks!
p.s. how exactly did you get the information as to what happens to the human body at various SPL levels?

experiments were done to rodents and then doctors estimated effects on humans based on those tests.

Some tests in the U.S. army's sound chambers were done on cadavers.

 

[Ed Lester 10+ year member]

that video was pretty nuts to watch, im honestly 100 percent amazed they let him

being there in person was even better. I was sure he was going to puke or something.

 

[JBGabriel 10+ year member]

I sat in a van doin 160's at 57hz and it was pretty intense. I sat in it during a six second burp. Full body coma is about all I can say. There was no breathing or seeing or moving. Honestly if I had sit in it for a whole bassrace I probably would have passed out from lack of the ability to breathe.

I cant even imagine sitting in something louder.