Speed Of Sound In Rubber Band

It was a simple cardboard bee a rubber band and a string.

Speed of sound in rubber band.

Since the vibration causes the sound when the vibration stops the rubber band stops moving the sound also stops. You should be able to see the difference in the movement of the string in the two trials. Even though you can t see the air vibrating your ear can hear it. Differences in pitch are caused by the speed of vibrations.

You held on to the end of the string and spun the bee around. Speed of sound m sec. Given that its density is far greater than air however the speed of sound in. You can actually see the increase in vibration strength.

It s a little annoying if one person has to hold the rubber. Sea water at 0c. The rubber band in turn pushes on the nearby air making it vibrate. To make a softer sound don t pull the string or rubber band back as far.

One would expect the very small elastic constant to make the speed of sound in rubber far less than other solids. 1450 sea water at 20c. 1522 sea water at 30c. The speed of sound is also different for different types of solids liquids and gases.

One of the reasons for this is that the elastic properties are different for different materials. Repeat the experiment and look closely. The vibration causes the sound. Speed of sound in rubber using the above formula 57 7 m sec.

Speed of sound in thin long solid bars is given by young s modulus for rubber y 4 10 n m and density ρ 1 2 or so. As it picked up speed it would start buzzing. 1545 butyl rubber carbon 100 40. If we increase the density of the string we decrease the wave speed and the pitch of the sound.

Elastic properties relate to the tendency of a material to maintain its shape and not deform when a force is applied to it. This is much smaller than the speed of sound in air which is 340 m sec at atmospheric pressure temperature.