Question

12. Which of the following has to happen before the eardrum begins to vibrate with the same frequency as the source of the sound waves? A. Impulses have to be sent to the brain through the auditory nerve. B. The brain has to interpret the direction from which the sounds are being delivered. C. Vibrations have to be transmitted to the fibers of the auditory nerve. D. The outer ear has to collect the sound waves and lead them to the middle ear.

Answer 1

Correct answer choice is :

D) The outer ear has to collect the sound waves and lead them to the middle ear.

Explanation:

The sound waves are produced by a sound root, such as the vibrating diaphragm of a radio speaker. The sound source generates waves in the around the tool. As the reservoir remains to vibrate the tool, the vibrations diffuse away from the root at the speed of sound, thus creating the sound wave. Vibrations in the air are called moving longitudinal waves, which we can hear. Sound waves consist of areas of high and low stress declared condensations and rarefactions, individually.

Answer 2

The outer ear has to collect the sound waves and take them to the middle ear.