I hate to be a technical pain in the rear.. no I don't.
A meteor wouldn't have much sound until it hit the ground, and then it would only be a big mega-H bomb sort of boom. Meteors are moving much faster than the speed of sound, about 50 times faster. No hiss, no whoosh. Just flash, boom.
I'd take a thunder clap, time stretch and down pitch it by a factor of four or so. If the speakers are good, that should come close to what it would sound like some miles distant. Of course the shock wave will travel through the ground about 50% faster than the airborn blast so having a lot of earthquake sort of buildings rattling and low rumbles before the air blast would be in order.
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