S4P2. Students will demonstrate how sound is produced by vibrating objects and how sound can be varied by changing the rate of vibration.
a. Investigate how sound is produced.
b. Recognize the conditions that cause pitch to vary.
Cool tunes to help you think about pitch and amplitude:
Here is a famous rock song called "Bohemian Rhapsody."
Notice how the singer Freddie Mercury sings, and how his pitch goes up at times. He can really hit those high notes because he increases the frequency of his sound waves!
He also changes amplitude; he starts out singing very softly, which doesn't require much energy. The more energy he gives, though, makes the amplitude higher...and we know that also makes his volume louder!
The Sound of Silence