HPP Activity 46v1
Activity 4: Homework
1. Suppose you have a microphone and computer-based data analysis system available to you, as
you did in the lab activity. The computer can display the microphone signal as a function of
time. Assume you make a single clicking sound with your tongue and then say "ahhh" for a few
seconds. Describe the difference in the displayed signal that you expect.
2. The figure below shows a snapshot of a pressure measurement for a periodic sound wave.
2.5
2
P [rel. units]
1.5
1
0.5
0
-0.5 0
1
2
3
4
5
6
-1
-1.5
-2
-2.5
x [m]
a. Specify the amplitude of the wave.
b. Specify the wavelength.
c. Assume that the speed of sound is 340. [m/s]. What must be the frequency of the wave?
Activity Guide
 2010 The Humanized Physics Project
Supported in part by NSF-CCLI Program under grants DUE #00-88712 and DUE #00-88780