The intensity (loudness or softness) of sound is determined by the amplitude of the sound wave. Let's examine a sound wave. Touch the parts of the sound wave to read a definition.

Crest

Crest The highest points on the wave

Wavelength

Wavelength The distance between two corresponding points of a wave (crest to crest; trough to trough).

Trough

Trough The lowest points on the wave

Amplitude

Amplitude The distance from the rest position to a crest or to a trough.

Click the next button when you are finished.

The host is using a microphone and the guest is wearing a clip-on microphone. The audio engineer monitors the levels on an audio console.

At the top of the audio console is a VU meter. The VU meter visually shows the amplitude. Good levels are between -3 and 0. Levels should not be too low or too high.

Faders are used to balance the audio levels. They work like the volume button on a remote control.

As the host and the guest talk, adjust the levels. Remember the levels should not be too low or high.

Hi, I'm Maria your host of "Kids Work Tells All." Today, we're speaking with Rick who has just returned from an adventure at the Kids Work Zoo. Hello Rick.