How fast a soundwave travels through an elastic medium is determined by its speed of sound. 343 metres per second (1,125 feet per second; 1,235 kilometers per hour; 767 mph; 667 kn) is the speed of sound in air at 20 °C (68 °F).
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Silky Terrier Dog Breed Playing AroundHow fast is sound in meters per second?
331.5 meters/sec, or 1087 ft/sec or 740 mph, is the speed of sound at 0° Centigrade and 1.013 N/m2 (normal atmospheric pressure).
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