The travel of soundwaves

Physics Asked by 00xxqhxx00 on November 28, 2020

As we are waiting in the subway station, we will hear the rail screeching when the train is arriving. Is it because soundwaves travels faster in a solid substance than in air? or is it a compartment in the rail?

One Answer

The speed of sound in a dense solid such as metal is more than ten times faster than in air. Also, the rail will act as an acoustic wave guide. Both of these factors explain why you can hear the sound of an approaching train through the rails before you hear it through the air.

Correct answer by gandalf61 on November 28, 2020

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