Max SPL volume possible.

[Pl8er 5,000+ posts]

So I was googling around trying to find out what is the loudest that car audio could go and I found it! 194 db.

At approximately 194dB, the sound pressure would have to change more than the ambient air pressure. At this point, the sound wave would have to create a negative air pressure to get any louder than this. Since that cannot happen air itself distorts sound by “clipping” the sound wave. This is also known as a sonic boom.

I figured I’d do a little numerical investigation to see what the max pressure corresponding to 194 dB is. I fired up MathCAD and started plugging away.

Pref = 20E-6 Pa

SPL = 194

P = Pref * 10^(SPL/20)

P = 1.002E5 or ~100kPa. ie atmospheric pressure

At 194 dB, sound pressure doubles atmospheric pressure in the compression stage, which requires a vacuum in the rarefaction stage.

That’s loud

Click to read more...

 

[stuckinok 5,000+ posts]

okay?

 

[nVRuckus 5,000+ posts]

ok?

 

[nVRuckus 5,000+ posts]

lol beat me to it

 

[stuckinok 5,000+ posts]

haha

 

[PhatTonyDeMarco 5,000+ posts]

Okie?

Just kidding, I knew the number but didn't exactly know why. Thanks //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[phyphoestilic 5,000+ posts]

thats great.............. there was a post about this already wasnt there?

 

[Pl8er 5,000+ posts]

Just sharing the info. *shrug* Next time I'll try to write a post asking if this Fi sub is better than the brahma, I'm sure that will be much more informative. LOL

Oh well, thought I was doing good and sharing some information.

 

[Mitch86 5,000+ posts]

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

 

[dvrmstrng 5,000+ posts]

i found it interesting...i guess we all know what to shoot for DB wise

 

[Pl8er 5,000+ posts]

i found it interesting...i guess we all know what to shoot for DB wise

Aye. Well I'm most likely hitting like 125 and hope to get up to the 140's tops and I would be very happy. I'm not really an SPL guy, more sound quality.

Although it would be pretty cool to go downtown, hit 194 and shatter some glass.

 

[seth350 10+ year member]

Thanks...I couldn't have done the math, so 194db is as loud it will go? Whats limiting it?

 

[CBFryman2 5,000+ posts]

Thank you for telling us some basic physics.

 

[CBFryman2 5,000+ posts]

Thanks...I couldn't have done the math, so 194db is as loud it will go? Whats limiting it?

air pressure. Standard Pressure is 101kpa (14.7PSI, aka the barometric pressure of air at sea level at 0 degrees celcius with out a strom affecting barometric pressure) once you reach 0kpa you cant get any louder on the negative side of the compression wave. You can stil lget louder on the positive side, but that can only travle as a shock wave (like the atomic bomb) not an actual wave.

Really you cant even have a 194dB wave because the wave will colapse on its self. 187dB is thought to be the loudest actual sound wave, and not just shock wave, you can produce.

 

[reneeb7363 10+ year member]

air pressure. Standard Pressure is 101kpa (14.7PSI, aka the barometric pressure of air at sea level at 0 degrees celcius with out a strom affecting barometric pressure) once you reach 0kpa you cant get any louder on the negative side of the compression wave. You can stil lget louder on the positive side, but that can only travle as a shock wave (like the atomic bomb) not an actual wave.
Really you cant even have a 194dB wave because the wave will colapse on its self. 187dB is thought to be the loudest actual sound wave, and not just shock wave, you can produce.

--- can someone refresh us on whom has THE LOUDEST VEHICLE in the SPL world and what their score was. I am thinking Alma Gates still holds the title but I am probably wrong.