Introduction to Sound

The purpose of the experiment was to become familiar with sound and it's characteristics lambda, period T, frequency f, and amplitude A by saying "AAAAAA" into a microphone connected to a sensor.

After saying "AAAAA" into the microphone, the wave projected has a periodic pattern--see above photograph and in large if needed.  Specifically there were three waves captured by the sensor in the small time interval.  And the period T was determined by diving the time interval by the number of waves.  This number was .009 Sec.  From here the frequency of the sound was determined 1/T = f which was 111.11 hz. The assumption is that the speed of sound is 340 m/s in the room.  From here, the wavelength was determined to be 3.06 meters.  The amplitude A was determined by subtracting the lowest peak of the wave from the zenith point of the pattern and diving that by two.  The highest point was 2.594  and the lowest point is 2.620.  This yields an amplitude of 0.167 m.  Moreover if data was collected for an "AAAAA" sample that was 10-times-longer time interval, the data might change a little bit because of damping.  That is to say that the wave will fall off some because one's "AAAAA" may not be uniform over the entire time frame.  If the "AAAAA" is quieter as time increases, then amplitude will become smaller.  This is the case because the amplitude of the wave is proportional to the magnitude of the noise.