No, the speed of light is 186,282.4 miles per second. The speed of sound at sea level is about 0.2114 miles per second.
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Sound doesn't travel at all in a perfect vacuum. Sound needs a material substance to move anywhere.
Consult Maxwell's Equations. It is derived from electrical and magnetic constants.
The speed of sound at sea level is about 0.211 miles per second.
Since a microsecond is a millionth of a second, just divide the distance light travels in one second, by a million.
At 20o Celsius, at sea level, the speed of sound is approximately 767 miles per hour.