After looking at a bunch of instruments and hearing Mrs. Brinza play them, we began to recognize patterns among them: all the high-pitched sounds came from the shorter things (bars, strings, tuning forks) and all the low-pitched sounds came from the longer things. A student asked to do the stick-thing again, but this time, change the stick's length in lieu of the amount of force going into it. So that's what we did!
We saw some patterns we were thinking would happen, but wanted more specific data from the sound app (this one now changed the pitch, but kept the volume the same). And here's what we found:
1. The number of waves (back and forth motions) we saw increased in the same time period as the pitch got higher, and the converse was true. Low-pitched sounds had fewer waves in the same time frame.
2. The amplitude (height of the wave) stayed the same.
This amount of waves per second we defined as frequency...and we figured out that Hertz is the way to measure the number of waves in a second!
2. The amplitude (height of the wave) stayed the same.
This amount of waves per second we defined as frequency...and we figured out that Hertz is the way to measure the number of waves in a second!