Sound Wave Interactions

Front

What is the Doppler Effect?

Back

The Doppler Effect is the change in frequency or pitch of a sound wave as the source of the sound moves toward or away from an observer.

Front

What is ultrasound?

Back

Ultrasound refers to sound waves with frequencies higher than 20,000 Hz, which are above the range of human hearing.

Front

Why can't humans hear ultrasound waves?

Back

Humans cannot hear ultrasound waves because they have a frequency higher than what humans can detect.

Front

What happens to pitch when a sound source approaches an observer?

Back

The pitch of the sound increases as the sound source approaches the observer.

Front

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

Back

The pitch of the sound decreases as the sound source moves away from the observer.

Front

What is sound intensity?

Back

Sound intensity refers to the power carried by sound waves per unit area, which affects how loud a sound is perceived.

Front

How do foam earplugs affect sound?

Back

Foam earplugs reduce the amount of energy in sound vibrations, making sounds softer.

Front

What is sonar?

Back

Sonar is a technique that uses sound waves to detect objects underwater by sending sound waves that reflect off the objects.

Front

What is the relationship between frequency and pitch?

Back

Frequency is the number of sound wave cycles per second, and it determines the pitch of the sound; higher frequency means higher pitch.

Front

What is the difference between amplitude and intensity?

Back

Amplitude refers to the height of the sound wave, while intensity refers to the power of the sound wave; higher amplitude means louder sound.