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I think, in most cases, the sound is omitted, since it's often the least interesting aspect of the event, and being a little underwhelming, almost detracts from the visuals. They aren't like loud, irregular rolling thunderclaps, with interesting sweet spots and curious deviations or oddities. They don't rumble and crackle or anything. One bang, a trail off of distant reverberation, and not much else. You have to figure audio equipment doesn't do the explosions much justice during playback either, in terms of volume and possibly seismic effects. It's just a single report, detached and delayed by the speed of sound, and the mandatory distance from the blast itself. The accuracy of this depiction is valuable, because it informs the viewer of what it would be like to witness a test first-hand, but as entertaining media that demonstrates the noises that relate to the visuals, the timing delay leaves an impatient gap between cause and effect. To provide improved legibility, the videos would probably want to synchronize the auditory report of the bang with the imagery of the explosion, and push the sound backwards by a number of seconds to remove the delay between sight and sound, due to distance. |