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45 miles per second is about 200 times as fast as The Speed of Sound
In other words, it's 211 times the speed of The Speed of Sound, and the speed of The Speed of Sound is 0.00474 times that amount.
(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 0.2130 miles per second. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 0.930 miles per second to 0.9690 miles per second in water, depending on its salinity.
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