What is Sound? Ch.21 Section 1

Front

What is the function of the pinna?

Back

To gather and focus sound waves.

Front

What is the part where particles are spread apart called?

Back

Rarefaction.

Front

What is the role of the eardrum?

Back

To transmit vibrations to the inner ear.

Front

What happens when the hair cells in the cochlea shake?

Back

They create electrical signals.

Front

Which section of the ear contains the hammer, anvil, and stirrup?

Back

Middle Ear.

Front

What is sound?

Back

Sound is a type of energy made by vibrations.

Front

What is a medium in the context of sound?

Back

A medium is a substance through which sound waves travel.

Front

What is compression in sound waves?

Back

Compression is the part of a sound wave where particles are close together.

Front

What is the cochlea?

Back

The cochlea is a spiral-shaped organ in the inner ear that converts sound vibrations into electrical signals.

Front

How do sound waves travel?

Back

Sound waves travel through vibrations of particles in a medium.