Properties of Sound Waves

What was the

loudest sound that

you heard
yesterday?

Music Lab Experiment

Observe what

happens as you
touch each of
the piano keys.

Make

observations for

what you see

and hear.

​https://musiclab.chromeexperiments.com/Sound-Waves/

Pitch and Frequency

Sound Waves

Properties of Sound Waves
• Frequency – the number of

vibrations that occur per
second

• Wavelength changes with

frequency

• Measured in Hertz (Hz)
• 50Hz = 50 vibrations per

second

Sound Waves

Properties of Sound Waves
• Frequency – the number of

vibrations that occur per
second

• Wavelength changes with

frequency

• Measured in Hertz (Hz)
• 50Hz = 50 vibrations per

second

Sound Waves

Properties of Sound Waves
• Pitch – a description of how high

or low the sound seems to a
person

• High frequency = high pitch
• Low frequency = low pitch
• Example: a young girl might

have a squeaky (high pitched)
voice, an older man might have
a deep (low pitched) voice

Sound WavesWhich waves have the highest pitch?