Correction for the speed of The Speed of Sound
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How fast is 664 feet per second?
It's about three-fifths as fast as The Speed of Sound
The speed of The Speed of Sound is about 1,130 feet per second.
(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 1,130 feet per second. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 4,910 feet per second to 5,120 feet per second in water, depending on its salinity.