Sound Waves Sound is produced by periodic changes in air pressure called sound waves. The yellow graph in the digital wave display below shows the graph of a pure tone from a tuning fork. What are the period and the amplitude of the sound wave?
How does identifying the cycle help you?
The period is the horizontal length of the cycle. The amplitude is half the vertical length of the cycle.
One cycle of the sound wave occurs from 0.004 s to 0.008 s. The maximum value of the function is 2.5, and the minimum value is 1.5.
Find the period.
Find the amplitude.
The period of the sound wave is 0.004 s. The amplitude is
Determine if the function is or is not periodic. If it is, find the period.
Error Analysis A student looked at the following function and wrote that the amplitude was 2. Describe and correct the student's error.