Sound Waves

Front

What is the Doppler Effect?

Back

The Doppler Effect is the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source. It is commonly heard in sound waves, such as the changing pitch of a police siren as it moves past.

Front

What is pitch in sound waves?

Back

Pitch is the perceived frequency of a sound. Higher frequencies correspond to higher pitches, while lower frequencies correspond to lower pitches.

Front

What is amplitude in sound waves?

Back

Amplitude refers to the height of the sound wave and is related to the loudness of the sound. Greater amplitude means a louder sound.

Front

What is frequency in 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 sonar?

Back

Sonar is a system that uses sound waves to detect objects underwater by sending out sound pulses and analyzing the echoes that return.

Front

What unit is used to measure sound intensity?

Back

The decibel (dB) is the unit used to measure the intensity or loudness of sound.

Front

What happens when a sound wave reflects?

Back

When a sound wave reflects, it bounces off the surface of a barrier, similar to how light reflects off a mirror.

Front

What is resonance in sound?

Back

Resonance is the phenomenon that occurs when an object vibrates at its natural frequency due to an external force, amplifying the sound.

Front

What is infrasound?

Back

Infrasound refers to sound waves with frequencies below the lower limit of human hearing, typically below 20 Hz.

Front

What is the relationship between frequency and pitch?

Back

Frequency and pitch are directly related; as frequency increases, the pitch of the sound also increases.