Probably bad for your hearing too (piefedimages.s3.eu-central-003.backblazeb2.com)
 

For reference, the loudest sound ever on earth was 180dB https://wikipedia.org/wiki/1883_eruption_of_Krakatoa

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[–] 151 points 1 year ago (5 children)

For reference, the theoretical maximum of sound with air as medium is 196db.

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  • [–] 51 points 1 year ago* (last edited 1 year ago) (2 children)

    at what dB does the air ignite from the vibration of molecules

    edit: okay so air does not ignite, but allows other things to ignite, but methane is one of those things in air so I reformulate the question as such:

    what pressure of air is needed to produce sufficient heat to ignite any methane trapped within it, and what dB level is needed to form such compression even if for mere nanoseconds?

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  • [–] 15 points 1 year ago* (6 children)

    Apparantly depends on the medium and the type of wave being measured in dB.

    At that point it can’t be sound waves, but potentially shockwaves could start to heat the air up.

    Eventually with high enough temperature you can get air to become plasma, any matter in the air might burn but the air itself will not.

    -not a scientist

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  • [–] 8 points 1 year ago (4 children)

    I mean sounds is just differently compressed medium, usually air. Why are shock waves not sound waves?

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  • [–] 5 points 1 year ago (2 children)

    Don't ask me, i am left with the exact same question myself. Which is why i felt the need to add the not a scientist disclaimer.

    Though i did some research just now and its because the waves exhibit different very different properties

    It might be a chicken and egg thing. Does it have different properties because it is fundamentally different, Or did we call it different because different properties emerged under different conditions (like having more energy)

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    [–] 127 points 1 year ago (6 children)

    The decibel scale is logarithmic, meaning that a 20,000 dB sound would carry an unimaginable amount of energy.

    A hypothetical 20,000 dB sound would have an overpressure of approximately 5 x 10^499 atmospheres, enough energy to obliterate the Earth instantly.

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    [–] 102 points 1 year ago (9 children)

    20000 decibel, or 2 kilobel

    yes, deci- is the si prefix for ^1^/10. the actual unit is the bel.

    i am saddled with this cursed knowledge so now you must be too.

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  • [–] 28 points 1 year ago (6 children)

    Are you a fellow PAG/NAG calculator, too?

    More cursed knowledge (for them, probably not you): it's logarithmic so every 3dB increase is double the energy!

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  • [–] 8 points 1 year ago* (last edited 1 year ago) (1 child)

    When I was in my first year of college - 26 years ago - I asked a question about logarithms and was thoroughly, angrily (and, looking back on the event, probably justifiably) reamed out by another student about it.

    I don't think I publicly spoke up for the rest of that class.

    edit: Remove extra words.

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  • [–] 12 points 1 year ago (2 children)

    I'm gonna go out on a limb and say it probably wasn't justified to respond to a math question like that lol

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  • [–] 11 points 1 year ago (1 child)

    I think it was an overreaction in terms of its delivery, but I was homeschooled and started college early. I was the stereotypical socially inept homeschooler. The class was introduction to college algebra, which doesn't usually cover logarithms AFAIK; I brought them up unprompted during a quiet moment when the teacher was cleaning the whiteboard. I was curious about them because I had been reading my older brother's textbooks and found them interesting.

    The other student's complaint about me was that I monopolized the teacher's attention by sitting front and center and raising my hand for every question. Additionally she felt that I was trying to show off. At that point I was also very visibly younger than everyone else, which did occasionally annoy people. (This became less of an issue when I hit puberty and started growing a beard.)

    But I was oblivious to those kinds of things at the time and didn't realize I was having any kind of impact on anyone else in the class until the other student chastised me. Perhaps it was an overreaction, but the message was one I needed to hear, I think.

    Also, to their credit, that student did apologize to me, more calmly expressing the nature of their grievances; I apologized in turn and said that I would try to be less disruptive.

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    [–] 28 points 1 year ago (6 children)

    Wonder if they got hertz and decibels confused when they were writing that.

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  • [–] 19 points 1 year ago (2 children)

    So Batman was trying to annoy the tiger away? I think more likely the schlock tv 60s kids show writers just had no idea what they were talking about

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  • [–] 10 points 1 year ago (2 children)

    Why wouldn't they have just googled it?

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    [–] 26 points 1 year ago

    This means Adam West Batman is the most powerful.

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  • [–] 19 points 1 year ago (1 child)

    That's a very..alternative usage of the word "realistically" 😄

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  • [–] 11 points 1 year ago (1 child)

    My back-of-the-envelope calculation says this would result in about 2·10^995^ Pa of sonic pressure. I could be way off, but yeah... the creation of a black hole seems likely.

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    [–] 10 points 1 year ago (1 child)

    Is a black whole capable of destroying the universe now?

    Like I get that 20,000 dB is physically impossible but so is good tasting bubble gum and that wouldn't destroy the universe.

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  • [–] 9 points 1 year ago

    i mean, if batman only says decibels, we don't know the reference value; SPL was never specified.

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  • [–] 7 points 1 year ago (1 child)

    Maybe they ment to say 20khz?

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  • [–] 6 points 1 year ago

    Good 'ol prep time

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  • [–] 5 points 1 year ago

    So about half of my upstairs neighbors teaching elephants to tap dance at 3AM.

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