Solution: A room contains air in which the speed of sound is
Chapter 35, Problem 48(choose chapter or problem)
A room contains air in which the speed of sound is 343 m/s. The walls of the room are made of concrete in which the speed of sound is 1 850 m/s. (a) Find the critical angle for total internal reflection of sound at the concreteair boundary. (b) In which medium must the sound be initially traveling if it is to undergo total internal reflection? (c) A bare concrete wall is a highly efficient mirror for sound. Give evidence for or against this statement.
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