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mojofunkster

Recording 160dB?

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So I'm working on some car stereo reality show thing. Anyway, i asked what exactly they wanted me to get and they want me to record inside and outside of the car. When I asked how loud it got, he said 160dB. I don't think this is possible, but if it is, anyone got any ideas?

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Yeah...either find a mic that will withstand the signal level of 160dB, turn down the level once inside, give up the gig or...stand back... It's audio not video...

Really though... Good question..

Wikipedia...

"A Boeing 747 jet engine. If you stood with your head inside the engine, you'd hear a 165 decibel roar. We don't recommend doing this; the human ear drum breaks instantly when exposed to sounds louder than 160 decibels. The sound of takeoff, if you're nearby, is around 140decibels.

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First of all, I would doubt their measurements. 

The DPA4017 comes to mind as it handles up 152dB spl, so it might just work. But a shotgun mic is probably not ideal. 

Mics made for drums could work. 

There are also some specialty mics. 

If all else fails use the measurement mic they used to measure the 160dB. 

And turn down your recorder or switch to line in

 

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so you'll want a dynamic mic, the SM58 is allegedly good up to 180dB but you'll need an inline pad as well as treat it as a line level signal. The electrical output of the SM58 at 160 dB SPL is +10 dBV or 3.2 volts. For reference 0.775 volts is equal to 0 dBu or -20 dBFS.

That and usually in these "dB drag racing" situations the car needs to be air tight, so you won't be able to sneak an XLR out the door. So if you "need" the sound inside the car, you'll want some sort of recorder that can sustain that environment and vibration.

What is most likely is you'll just need audio from outside the car. It'll still be loud as hell, but significantly lower than inside the car, You'll be pushing the limits of your gear but you won't need anything special (other than an inline pad) I'd suggest something like this on your boom, just incase "all the way down" is still too loud - http://www.sescom.com/product.asp?item=SES-MULTI-PAD

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3 minutes ago, Shastapete said:

so you'll want a dynamic mic, the SM58 is allegedly good up to 180dB but you'll need an inline pad as well as treat it as a line level signal. The electrical output of the SM58 at 160 dB SPL is +10 dBV or 3.2 volts. For reference 0.775 volts is equal to 0 dBu or -20 dBFS.

That and usually in these "dB drag racing" situations the car needs to be air tight, so you won't be able to sneak an XLR out the door. So if you "need" the sound inside the car, you'll want some sort of recorder that can sustain that environment and vibration.

What is most likely is you'll just need audio from outside the car. It'll still be loud as hell, but significantly lower than inside the car, You'll be pushing the limits of your gear but you won't need anything special (other than an inline pad) I'd suggest something like this on your boom, just incase "all the way down" is still too loud - http://www.sescom.com/product.asp?item=SES-MULTI-PAD

Nice number crunching. I was thinking an SM58 would be 1 way to go but I like Constantin's idea of using the measurement mic they base their claims on. Anyway I think he should have a pad that goes all the way to '11', even if he doesn't need it ;- ) And who gets to choose the music?

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2 minutes ago, daniel said:

Nice number crunching. I was thinking an SM58 would be 1 way to go but I like Constantin's idea of using the measurement mic they base their claims on. Anyway I think he should have a pad that goes all the way to '11', even if he doesn't need it ;- ) And who gets to choose the music?

 

Not so much music as burst of LF sine wave 

 

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1 minute ago, Shastapete said:

 

Not so much music as burst of LF sine wave 

 

 

 

That is so jokes. And of course, why would you want to disrupt all that male bonding with something as potentially divisive as someone's taste in music. I must get some friends round to enjoy some sinusoidal LF, and after few refreshments mix it up a bit some white noise.

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4 minutes ago, Philip Perkins said:

So all that cheering is because the played a buzzy bass note @ 180+db?  

Yeah, awesome no? Kind of confirms (to me) that when some 'audiophiles' listen to their 'systems' they are just listening to their systems and the content (music) has nothing to do with it.

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5 hours ago, Philip Perkins said:

So all that cheering is because the played a buzzy bass note @ 180+db?  

 

I think I heard that tune at Kezar Pavilion in 81, man. 

 

 

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I've mic'd some high SPL sources including firearms, auto exhaust & engine compartments with the Sennheiser 421, a popular drum mic. Offhand,  I don't know the max SPL, but it's high.

A 160 dB car stereo? ..  I don't think so..

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What is the point of recording it at that level? I highly doubt anyone is ever going to play it back at that level.

 

If it is a reality based show the zinger could be that the system is so loud it can't be recorded without blowing up your gear (...cue the pink smoke).

 

BTW, if you do record it, make sure you leave at least 12dB of headroom on your recorder. We wouldn't want the signal to clip....LOL

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Wow, that is some culturally specific reference point. Genesis P-Orridge / Throbbing Gristle / PsychicTV had their HQ, 1 street over from my first flat in Hackney (London). Apparently William Burroughs visited too. Lives now in USA, NY(?)

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