Transcript 5*1 Sounds in vibrating strings

 WDYS???
(p484)
3.
.
.
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
WDYT???
1.
Guitarists make different sounds by
_____.
The “air guitarist” makes a HIGH PITCH
note by _____.
1.
2.
2.
1.
Set up materials: Pully, 500g mass, String,
Plastic Cup, and Clamp
2.
Draw the picture
3.
Measured LENGTH of VIBRATING string:_____
Pluck the string and listen to the sound at the
cup-opening, is it HIGH or LOW in pitch?
Length of String
Pitch (Low, Medium, High)
1.
1.
2.
2.
3.
3.
4.
4.
***Mass is constant at 500g***
4 b) The pitch becomes _____ as the length of
the vibrating string gets SHORTER
5.
Mass on Pully
Pitch (Low, Medium, High)
1.
500g
1.
2.
1000g
2.
3.
1500g
3.
4.
2000g
4.
***Length is constant at _____***
6b) As the tension of the string is increased,
the pitch of the vibrating string _____.
 To
produce a sound, something must vibrate
 In
the Investigate, we studied 2 variables, length
and tension
 Pitch
a)
b)
 how HIGH or LOW a note is
Shorter string = _____ pitch
Longer string = _____ pitch
***Therefore, change is length = change in pitch***
 Adding
a)
b)
mass to the string, increased the tension
Less mass = Less tension = _____ pitch
More mass = More tension =_____ pitch
1.
2.
HIGH Pitch 
Increase the tension
Decrease the length
1.
2.
3.
4.
The pitch of the sound _____in a string as
its tension increased.
Decreasing the length of a string _____ the
pitch of the sound produced by an
instrument.
Adding mass in the Investigate _____ the
tension on the string.
In percussion instruments, sound is
produced by _____.
1.
a) You can change the tension in a vibrating
string by _____.
b) Increasing the tension _____ the pitch of the
sound produced by the string.
2.
a) The string is shortened by _____.
b) Decreasing the length of the string _____ the
pitch of the sound.
3.
a) If the tension is _____, the string length
should also _____ to keep pitch the same.
b) If the length is _____, the tension should also
_____ to keep the pitch the same.
4. a) If the tension was _____ and the length
_____ by an equal amount, the pitch would
change.
5. a) The guitarist plays different notes by _____.
b) For both instruments, the pitch is adjusted
by changing the _____.
6. a) These knobs are used to change the _____.
b) Increasing the tension _____ the pitch,
while decreasing the tension _____ the pitch.