This calculator will tell you the wavelength of any airborne audio frequency in inches, feet and metres, based on the speed of sound at sea level, and at 20 degrees Celsius or 72 degrees Farenheit. Note that with audio frequencies of 20Hz to 20,000Hz the range of physical sizes of wavelengths is substantial (1000:1), and this causes no end of problems with loudspeaker system design.
Mc Squared System Design Group, Inc
323 - 901 West 3rd Street
North Vancouver, BC V7P 3P9
Phone 604 - 986 - 8181