let’s measure sound! let’s use a microphone, different sized tuning forks and a computer to help...

Let’s measure sound!Let’s use a microphone,

different sized tuning forks and a computerto help us explore the pitch of sound waves.

Click here to See the Vibrations

Click here to See the Vibrations

Tuning Forks comein different lengths!

What is the difference between the longand short tuning fork’s sound?

LOW

HIGH

Tuning Forks: Long and Short

Two VibrationsLong Fork

Five VibrationsShort Fork

Which tuning fork will makethe highest pitch (frequency) sound?

The longest tuning fork.

The middle-sized tuning fork.

The shortest tuning fork.

They all make the same pitch of sound.

First think, then use your mouse and click the answer!

Look at the two sound waves below.

One sound wave is a dark red line.The other sound wave is a thin red line.

What is true about these sound waves?The dark red sound wave has 10 vibrations.

The thin red sound wave has 6 vibrations.

The dark red sound wave is softer than the thin red sound wave.

The thin red sound wave is lower than the dark red sound wave.

The dark red sound wave has 10 vibrations.

The thin red sound wave has 6 vibrations.

The dark red sound wave is softer than the thin red sound wave.

The thin red sound wave is lower than the dark red sound wave.

“Are you sure?”

What is true about these sound waves?

The dark red sound wave has 10 vibrations.

1 2 3 4 5 6 7 8 9 10

What is true about these sound waves?

The thin red sound wave has 6 vibrations.

1 2 3 4 5 6

What is true about these sound waves?

The dark red sound wave is softer than the thin red sound wave.

Look at the height of half the wave.

Height Half-wave =

Height Half-wave =

What is true about these sound waves?

Height Half-wave =

The shorter half-wave height is the softer the sound.

The sound wave with the fewest vibrations per second

is lowest in pitch.

What is true about these sound waves?

The thin red sound wave is lower than the dark red sound wave.

The thin red sound wave has has 6 vibrations = low

The thick red sound wave has 10 vibrations = HIGH

What can you say is true about these sound waves?Did you count 25 vibrations for the thin red sound waveand 12 vibrations for the thick red sound wave?

The thin red sound wave is higher pitch and louder thanthe thick red sound wave.

Please try again !

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