Introduction to Sound

Objective
Use sound sensor, logger pro, and tuning fork to study sound waves.

Procedure

Let first person say "AAAAAAA" into the microphone and collect the data

 

 Let another person do the same thing and record the data.

 

Strike the tuning fork and record the data

 



Data

 

First Person

 

 

Second Person

 

 



Stuck the tuning fork hardly

 

 

Struck the tuning fork softly

 Questions

1
a) Yes, it is repeating.
b) We observed 4 waves. We determined waves by group
c) Prob time is 0.03 seconds. It is about a blink of an eye.
d) The period of the waves is 0.0075 seconds
e) Frequency is 133Hz
f) Lambda =2.55m. It is about the height of the classroom
g) Amplitude is about 0.6115 (no unit)
h) There would be more waves, but the frequency, lambda, amplitude will stay the same
    test results: there are 38 waves, period become 0.00789, lambda becomes 2.68, Amplitude becomes 0.602

 

 

2
 18 waves, T=0.00167s, A=0.234, lambda=0.566m

3
8 waves, T=0.00375, A=0.0695, lambda=1.275

4
We expect to have the same frequency, wave length, sahpe, but different amplitudes.

    Struck softly


   Struck hardly