String Telephones versus Sound tubes... STEM project.... Homemade Science with Bruce Yeany

In preparation for a summer science STEM project, I visited my old school district and had some middle school students build and test some materials used in making string telephones and whisper or sound tubes. The Investigation was to determine the factors that gave us the best results, including changes in container materials, size of the horn, diaphragm size and stiffness, type of string, tautness of string, etc. Students are asked to rate the devices in four categories, including volume, clarity, pitch, tone and then summarize their findings. Future investigations will center around trying to improve the efficiency of the string telephones for better sound transmission.
I apologize for the quality of sound in several of the clips as I was battling the noise from this summer cicada population. The devices actually sounded better than the recordings indicate as I had to use filters to try and reduce the reduce the unwanted noise levels.