Name: Factors Affecting the Speed of Sound in Air
Uploaded: 2019-07-19
Duration: 3 min
Description: The most common medium that allows us to hear sounds around us is air. But did you know that temperature, humidity and wind can also affect the speed of sound waves?

Question

Draw a neat and labelled diagram of the human ear. With the help of this diagram, explain the construction and working of the human ear.

Accepted Answer

The outer ear is called ‘pinna’. It collects the sound from the surroundings. The collected sound passes through the auditory canal. At the end of the auditory canal, there is a thin membrane called the eardrum or tympanic membrane. When compression of the medium reaches the eardrum the pressure on the outside of the membrane increases and forces the eardrum inward. Similarly, the eardrum moves outward when a rarefaction reaches it. In this way, the eardrum vibrates

The vibrations are amplified several times by three bones (the hammer, anvil and stirrup) in the middle ear. The middle ear transmits the amplified pressure variations received from the sound wave to the inner ear. In the inner ear, the pressure variations are turned into electrical signals by the cochlea. These electrical signals are sent to the brain via the auditory nerve, and the brain interprets them as sound.

Draw a neat and labelled diagram of the human ear. With the help of this diagram, explain the construction and working of the human ear.

Important Questions on Sound

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