CH5+Sec+1

=Section 1=

Guitarists or violinists today either stretch or compress the strings that they are using. If someone were pretending to play a guitar, they would have to bring their hand as close to the body of the guitar.
 * What do you think?**

Look up "Career as a sound technician" on the internet and find out what a road technician does with a rock group.!!!!!!!!!!


 * Physics Talk**
 * Something must vibrate to produce sound
 * You can change variables such as length to change the pitch
 * Vibrate: move back and forth rapidly
 * Variables: something that can change or vary during an investigation
 * Pitch: how high or low a note is
 * By adding mass to the end of a string you change the pitch by tightening the string by adding more tension

1. The pitch of the sound produced by a string when its tension is increased is higher. 2. Decreasing the length of a string in an instrument lowers the pitch 3. Adding mass to the mass hanger adds more tension to the string and makes the pitch higher 4. Sound is produced in an instrument through vibration of the instrument's strings
 * Checking Up**

double pitch, quadruple tension
 * Physics Plus**

double frequency, 1/4 length

You change both the thickness and length of a piano string to keep the strings from being extremely long.

1. a. You can change the tension in a vibrating string by adjusting the thickness of the string or its length b.Changing tension changes the pitch of the sound; when you make the string shorter and thinner, the pitch goes up
 * PTG**

2. a. you can change the length of a vibrating string on a guitar by adding your finger to the neck of the guitar and make the string shorter. b. changing the length changes the pitch of the sound; when you shorten the string, the pitch increases. It is an inverse square root relationship.

3. a. You can make the string shorter and thicker to keep the pitch the same b. You can make the string longer and thinner to keep the pitch the same

4. The pitch will change dramatically

5. a. A performer plays different notes on a guitar by making the strings shorter/longer by pressing on different frets b. You can change the pitch of the strings on a guitar by making the strings longer or shorter with the tuners

6. a. The tuners change the length of the strings b. Tuners are needed to change the pitch of the guitar c. when temperature increases, the strings stretch and change pitch

7. a. Frets are used to change the length of the strings b. No c.They require more finger placement accuracy in playing because there are no frets

Musicians make sounds with different pitches by changing the length, and tension of the strings that they are using. The thickness of the strings they are using will also effect their tune
 * What do you think now?**