Understanding How We Perceive Sound

The video explains how we perceive sound through hearing. Sound waves enter the ear canal, causing the eardrum to vibrate, which moves the tiny bones in the middle ear. The stirrup bone, the smallest in the body, transmits vibrations to the cochlea, where cilia convert them into nerve impulses for the brain to interpret. High and low frequencies are detected at different parts of the cochlea. Prolonged exposure to loud sounds can cause hearing loss. Sound intensity is measured in decibels, with safe levels between 10 and 80 decibels. The video concludes with a review and quiz on key concepts.

Which part of the ear is responsible for focusing sound waves and directing them inward?

• Eardrum

• Ear canal

• Cochlea

• Stirrup bone

What is the function of cilia in the hearing process?

• They measure sound intensity.

• They protect the inner ear from loud noises.

• They amplify sound waves.

• They convert vibrations into nerve impulses.

Where in the cochlea are high frequencies detected?

• Throughout the cochlea

• In the middle of the cochlea

• At the end of the cochlea

• At the beginning of the cochlea

What unit is used to measure the intensity of sound?

• Hertz

• Decibels

• Watts

• Lumens

Why is it important to wear ear protection in loud environments?

• To improve concentration

• To prevent hearing loss

• To enhance sound quality

• To block out all noise