Remember, each tester will get three attempts at locating the sound source. Two performance indexes may be calculated to evaluate the performance of your team's Hearing Enhancer. Sound travels from its origin to our ears in waves. Humans hear sounds with frequencies between 20 and 20,000Hz. Water waves are different from sound waves because they rely on gravity to exist and involve an interface of two different fluids.
Sound waves are actually waves of changing pressure.
The law of reflection says that the angle both rays make with the reflecting surface are equal. Acoustic reflectors are used in many applications. In other words, you may treat the problem as a geometrical one in which sound rays spread out from the source in straight lines and are reflected from the surfaces according to the law of reflection. Sound rays are simply imaginary lines drawn from the sound origin in all possible directions of propagation. This rule also applies to curved surfaces like cones and parabolas.