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0.00000220 times the speed of light is about one-and-nine-tenths times as fast as The Speed of Sound.
In other words, it's 1.920 times the speed of The Speed of Sound, and the speed of The Speed of Sound is 0.5210 times that amount.
(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 0.000001140 times the speed of light. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 0.000004990 times the speed of light to 0.00000520 times the speed of light in water, depending on its salinity.
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