[SML] Decibels

[Richard Niederberg]

Dear Joe,
I still think that Krakatoa erupting was pretty loud by current standards,
but I wasn't anywhere near Java at the time...
/s/ Richard
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On Fri, Sep 23, 2016 at 6:35 PM, Jeffrey Kanyuck via Stagecraft <
stagecraft at theatrical.net> wrote:

> Wow Joe, Thanks for that. That really gave me a laugh thinking about those.
>
>
>
>
>
> *From:* Stagecraft [mailto:stagecraft-bounces at theatrical.net] *On Behalf
> Of *Joe Wilson via Stagecraft
> *Sent:* Friday, September 23, 2016 3:55 PM
> *To:* Stagecraft Mailing List
> *Cc:* Joe Wilson
> *Subject:* Re: [SML] Decibels
>
>
>
> S'funny, this came up on Reddit today, referring to someone exaggerating
> about an internet ad playing at 500dB.
>
>
>
> >The loudest sustainable soundwave in Earth's atmosphere at sea level is
> about 194 dB, which would be a longitudinal wave with a compression of 2
> atmospheres, and a rarefraction of pure vacuum. A website playing music
> through your computer speakers at 194 dB would be more intense than the
> Saturn V main engines firing at your face, and it would be clearly heard
> from a couple thousand miles away. Atmospheric sounds that are louder than
> 194 dB are heavily distorted, and are effectively shockwaves. The most
> powerful known atmospheric shockwave in human history is the Tunguska event
> of 1908, which was caused by a meteoroid or comet fragment slamming into
> the atmosphere and exploding a few miles above Earth's surface. The 300 dB
> shockwave hit the ground with the force of 5 million tons of TNT, and
> leveled 770 sq miles of forest. A 320 dB shockwave has the destructive
> force of a 14 Gigaton nuclear bomb, which would clear a crater about 12.4
> miles in diameter and 1.33 miles deep. Listening to a 365 dB shockwave
> would exert a similar pressure on your head as laying back in your favorite
> chair, and resting the moon on your face. A 500 dB shockwave has only been
> theorized in black holes and neutron starquakes, and would vaporize your
> head, your house, your city, annihilate your country, ignite the
> atmosphere, flash boil the oceans, and probably shatter the continent that
> you are sitting on. That would be a very annoying popup ad.
>
>
>
> --
> _________________________
> Joe Wilson, ATD/Sound
> Indian River State College
>
> Adding one more "me too" to the
> collective internet consciousness.
>
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-- 
/s/ Richard
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