Understanding Sound and Hearing

What is the role of the outer ear, also known as the pinna, in the hearing process?

• It amplifies sound waves.

• It funnels sound waves into the auditory canal.

• It converts sound waves into electrical signals.

• It balances the pressure in the ear.

Which part of the ear is responsible for converting vibrations into electrical signals?

• The eardrum

• The ossicles

• The cochlea

• The semicircular canals

How much louder is a sound that measures 80 decibels compared to one that measures 70 decibels?

• Twenty times as loud

• Ten times as loud

• Five times as loud

• Twice as loud

At what decibel level can sounds start to become annoying and potentially harmful with prolonged exposure?

• 50 decibels

• 60 decibels

• 70 decibels

• 90 decibels

What is the recommended action for workers exposed to loud noises for extended periods?

• Listen to music

• Increase the distance from the noise source

• Use ear protection

• Take frequent breaks