Question

what is the speed of sound in vulcanised rubber?

Answer 1

hi

Speed of the sound in thin long solid body is given by :-

$v = \sqrt{y \div p}$
Young modulus for rubber Y=4*10^6 N/m^2 and the density d=1.2 or so.

Speed of the sound in rubber using the above formula =57.7 m/second. This is much smaller than the speed of the sound in air. which is 340 m /second at atmospheric pressure / temperature.

For vulcanised rubber the young 's modulus Y=2.8*10^6N/m^2 and the density=around 920kg/m^2. So the speed of the sound is=55.1m/second.
Vulcanised rubber is even softer than the rubber.

Thank you