sound waves

How is sound created?

Sound is created when something vibrates, sending waves through the air or other media.

What is required for sound to travel?

Sound waves must have a medium to travel through, such as gas, liquid, or solid.

What term describes areas where particles are closer together in a sound wave?

Compression.

What term describes areas where particles are spread apart in a sound wave?

Rarefaction.

What is elasticity in relation to sound?

Elasticity is the ability of a material to bounce back after being disturbed.

What is the effect of temperature on the speed of sound?

Sound travels more slowly at lower temperatures; increasing temperature allows for faster particle movement and therefore faster sound.

What are the four properties of sound waves?

Intensity, Loudness, Frequency, Pitch.

What is intensity in relation to sound waves?

Intensity is the amount of energy the wave carries per second through a unit of area.

How is loudness measured?

Loudness is measured in decibels (dB).

What does frequency measure in sound waves?

Frequency measures the number of vibrations that occur per second.

What does pitch describe?

Pitch describes how high or low a sound seems to a person.

What is the Doppler Effect?

The apparent change in frequency as a wave source moves in relation to the listener.

What happens to pitch when a sound source moves toward a listener?

The pitch appears to increase (higher frequency).

What happens to pitch when a sound source moves away from a listener?

The pitch appears to decrease (lower frequency).