3 ms·
Meh. This is a pressure wave. I wouldn't be surprised if tapping your finger on the table creates more pressure than that. Or hammering a nail, at least¹. Even
by MayeulC 4y ago
Meh. This is a pressure wave. I wouldn't be surprised if tapping your finger on the table creates more pressure than that. Or hammering a nail, at least¹.
Even your TNT figure has a distance indication. Pressure decreases with the square of the distance when it dissipates as a sphere. Doubling the distance = -6 dB
¹ 20*log(k)=180 => k=1e9, factor to reach between rest state and max pressure, I think.
- Godel_unicode 4y agoIs it? Doesn't Hopkinson–Cranz scaling mean that it would decrease at the cube of distance?
- WJW 4y agoTnt exploding at 15 feet is definitely still a problem for living things. With regards to the article, by confining the pressure wave to a tube you effectively keep the surface area of the wavefront constant and so dissipation is much less of an issue.
- nautilius 4y agoThis makes no sense. Of course sound is a pressure wave - but so is being hit by a nuclear blast wave (after the initial flash). Obviously, the magnitude plays the decisive role here and not it being a pressure wave.