Question

List two applications of reflection of sound.

Answer 1

Hint: You can start by briefly explaining the reflection of sounds. Then write two applications of reflection of sound, you may write its application on any two of the following: Hearing aids, soundboards, SONAR, stethoscope, echo, etc.

Complete answer:
Reflections of sound are a reflection of sound when they strike a surface, this spreads the sound more.
Two applications of reflection of sound are:

Hearing aids – Some people have hearing disabilities because of a defect by birth or due to an accident. These people cannot hear normally and we have developed hearing aids by using the technology of reflection of sound to help these disabled people. Hearing ears are placed in the ear near the ear canal. When the hearing aid receives sound from the surroundings, the sound is reflected in a narrower chamber which leads deeper to the ear. Due to the reflection in the inner ear, the sound becomes amplified.

Soundboards – An effect of reflection of sound is that curved surfaces reflect sound very uniformly. You must have seen an auditorium may be in your school or university. Soundboards are the curved surfaces that are placed in auditoriums and halls, that help the sound to uniformly spread throughout the auditorium or halls. You must have also noticed that the auditorium of big institutions have curved walls to evenly spread the sound, without soundboards and curved walls the sound in an auditorium will sound non-uniform and will not be pleasant to the ear.

Note:
Other than the applications mentioned in the solution, the reflection of sound is used in SONAR ( a technology of locating objects underground), in the working of stethoscope used by doctors to diagnose patients, it is also the fundamental concept behind the phenomenon of echo and also used in a megaphone.