Sound Waves and Hearing

Front

What is an echo?

Back

An echo is a reflected sound wave that is heard after the original sound has been produced.

Front

True or False: Sound travels faster through solids than through liquids.

Back

True

Front

What causes the change in pitch of a sound as the source moves closer or further away?

Back

The change in pitch is caused by a change in the sound wave's frequency.

Front

Which sound wave represents a low-pitched and loud growl?

Back

A low-pitched and loud growl is represented by a sound wave with a lower frequency and higher amplitude.

Front

What is sonar?

Back

Sonar is a method of locating objects underwater using sound waves.

Front

Define frequency in the context of sound waves.

Back

Frequency is the number of waves that pass a point in one second, measured in Hertz (Hz). Higher frequency means a higher pitch.

Front

What is amplitude in sound waves?

Back

Amplitude is the height of the sound wave, which determines the loudness of the sound. Higher amplitude means a louder sound.

Front

What is the relationship between pitch and frequency?

Back

Pitch is how high or low a sound is perceived, and it is directly related to the frequency of the sound wave.

Front

How does sound travel through different mediums?

Back

Sound travels fastest through solids, slower through liquids, and slowest through gases due to the density and elasticity of the medium.

Front

What is the Doppler effect?

Back

The Doppler effect is the change in frequency or pitch of a sound as the source moves relative to an observer.