billsil t1_j99epup wrote
Reply to comment by manicdee33 in ‘We found the Artemis-I noise level at 5 km had a crackling quality about 40 million times greater than a bowl of Rice Krispies.’ — Maximum noise measured during Artemis-I launch on 16 Nov. 2022 was higher than predicted by marketrent
Depends how much it pops.
136 dB is really loud. Also Bels are not really a unit. You take the logarithm of a pressure relative to 20 microPascals (the threshold of human hearing), so it's unitless. Deci-bels are 1/10 as large as a Bel and just make the numbers easier. Otherwise, we'd be talking about 13.6 Bels.
Beyond that I understand part of it. An octave is a power of 2, so 20 Hz to 40 Hz. The 1/3 octave part means that between 2 octaves, you have 3 bands. So for 20 Hz, the range of interest is 20/2^1/3 to 20*2^1/3 (or 15.9 to 25.2 Hz).
The USA is best known as the country that will do anything to avoid using the metric system.
That quote is metric and English friendly.
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