Call attention to the career fields that are related to this module. Discuss how students might prepare for occupations that interest them. Remind students to tap gently, and to treat all instruments with care. Since this lesson concentrates on the artistic qualities of sound, it isn't necessary to spend time with a detailed description of how the oscilloscope works. Frequency is how many waves there are per second.
Frequency relates to pitch.
A high note or sound has a higher frequency than a low note or sound. Use the tone bar and a triangle to demonstrate the differences in pitch. Amplitude is how high and low the wave moves from the middle. Amplitude determines loudness or softness. A soft noise has a small amplitude - it doesn't move very far up and down from the horizontal.