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Reading a book about the extremes in nature/physics etc. The one on loudness is interesting. The French Horn is the loudest unamplified instrument, and a third of players under 40 have some related hearing loss. Something like Saturn V taking off is around 200dB, whereas Krakatoa or Tunguska were reckoned to be between 300-315dB*. Above 160dB at close range is apparently 'probably not survivable'.

*Being near anything like this would not only blow your eardrums, but also pulverise organs and shatter bones.
 

Friesiansam

Well-known member
Reading a book about the extremes in nature/physics etc. The one on loudness is interesting. The French Horn is the loudest unamplified instrument, and a third of players under 40 have some related hearing loss. Something like Saturn V taking off is around 200dB, whereas Krakatoa or Tunguska were reckoned to be between 300-315dB*. Above 160dB at close range is apparently 'probably not survivable'.

*Being near anything like this would not only blow your eardrums, but also pulverise organs and shatter bones.
I read somewhere, a very long time ago, that the low frequency vibrations generated by the Saturn V at lift-off, would cause internal rupturing in large animals, up to around a kilometre away.
 
I read somewhere, a very long time ago, that the low frequency vibrations generated by the Saturn V at lift-off, would cause internal rupturing in large animals, up to around a kilometre away.
It also described how sound changes above 194dB, because the acoustic energy is so high that it overcomes atmospheric pressure - which is why rocket sound is a sort of crackle.
 
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From the same book, about density.

A cricket ball weighs roughly 160g.
One made of lead would weigh 2.2kg.
One made of gold would weigh 3.8kg.
One made of osmium would weigh 4.4kg.
One made of plasma from the centre of the sun would weigh 31kg.
One made of neutron star material would weigh 200,000,000,000 tonnes - about the same as Mount Everest.
 
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