EEVblog Electronics Community Forum
General => General Technical Chat => Topic started by: Gavin Melville on January 17, 2020, 01:09:52 am
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Just saw this on the local McDonalds drive through (in Christchurch, New Zealand)
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I am not going anywhere near a sound that loud.... Most reliable sources say the loudest sound you can have is 194dB, because the low pressure end of the waveform would be a vacuum, after that it becomes an impulse.
Perhaps the loudest sound on earth was the The Tunguska event, which was a massive explosion that occurred near the Tunguska River in Russia, on June 30, 1908. The explosion was most likely caused by the air burst of a large meteoroid or comet fragment at an altitude of 5 to 10 kilometers (3–6 mi) above Earth’s surface. It was measured with the similar impact of a 1000-Mega-ton bomb with a decibel rating 300-315. And we're still 900 dB short.
Despite a background in Concert Sound I've never come across the DMWM "standard rating", and google doesn't really give any useful results. Has anyone come across this ?
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I'm curious, does Christchurch have a lot of criminal activity? Or is this just a warning to hopefully limit liability in spite of the exaggerated sound level claim?
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Don't confuse Db and dB, deci-Bel's are the unit commonly used for sound levels.
In this case it must be Donald's balls... Impressive I must admit!
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Meh. Never been to a Disaster Area rock concert have you ? Optimum sound balance is 27 miles from the stage in concrete bunkers underground.
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Those must be Chinese dBs... is DMWM anything like PMPO? ;)
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No, not at all, and not in that area.
Most of that poster is pretty silly.
I thought about calling McDonalds corporate and explaining how dangerous 1200 dB would be. I think a sound that loud would destroy the planet. Then again destroying McDonalds may not be a crime.
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Pressure at the center of a neutron star? 1.6e34 Pa. 1200db SPL? 2e55 Pa.
Set off the alarm, and they create a black hole just out of spite.
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So much security to sell burgers...
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They stream to the police 24/7, have cctv 24/7, police will look for it 24/7! And they have somebody in the local weight&measurement comittee. They are the danger. :bullshit:
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I just have this crazy vision of someone breaking in to that place and the alarm is so loud it reduces the building to dust ::)
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MacDollars should be worded up that any likely perps will not, and or can not, READ.. ???
especially a sign with no food, shakes, or police with cuffs and blasters pictured
and any perps that can read won't know what '1200Db DMWM' means,
calorie stats for a Big MacFat burger?
That sign is a waste of junk food ad space :palm:
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obviously 1200 Dicks broken, Don't Mess With MacDonalds.
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(I've been known to digress !!) :P
Reminds me of an Airlines report log from pilots to maintenance...
Pilot: "The warning sounds are 'unbelievably' loud!!"
Maint: "Set the sound to a more 'believable' level".
Not to mention...
Pilot: "Rattling noise under front console. Sounds like a midget with a hammer!".
Maint: "Took hammer away from midget...".
Or the worst...
Pilot: "Engine 3 is missing!"
Maint: "Found engine-3 on the right wing!"
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That's way more neutrons than dubnium is supposed to have.
Tim
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WARNING
This McDonalds contains the trigger to the self destruct at the center of the planet. Any funny business and the quantum detonator will fire causing the core to go supernova and vaporize the entire solar system in a nanosecond.
DON'T TEST US!
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obviously 1200 Dicks broken, Don't Mess With MacDonalds.
"1200Db = 1200 D!cks broken?!! :o
Don't be that '1201 guy or hermafrodite' :scared:
Don't Mess With MacDonalds" :phew:
So what THD and IMD ratios are we talking about at such a genital trashing level,
and what are they using to measure the levels and what weighting scales used, A, B, C,
or a custom 'D' etc etc
:D