Recent comments in /f/todayilearned

SamtheCossack t1_j6ih8j5 wrote

Mostly because it is in water.

Trying to compare decibels in air to decibels in water is not really a useful measurement of anything, since the nature of sound changes dramatically in different materials. Also, directed sound, like this, would only hit the peak amplitude in the exact center of the cone, and would drop off rapidly towards the edges, as opposed to a radial effect like an explosion, where it would be consistent across a wide front. This enables much higher amplitudes, but in an extremely small area, with a lot less energy overall.

So yeah, for a lot of reasons, saying gunshots are ~150 decibels, and Sperm Whales can hit 230 decibels is technically accurate, but not really what it sounds like. For instance, a pistol shrimp can hit ~220 decibels, but is almost completely harmless to anything bigger than a minnow, because it has such a short duration, and tiny scale.

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Rattus375 t1_j6id7k0 wrote

Well that's just a moronic take that's just trying to be divisive for no good reason. Objectively, canada has far less useful and valuable land than the US does. There's a reason the majority of the population lives right on the border. Having more lakes isn't inherently good or bad as long as it doesn't tend too far towards either extreme and this says absolutely nothing about the countries listed other than their land area

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