[O-08] Poster presentations by senior high school students

[O08-P06] The ultimate way to make a high-performance string telephone.

*Yuma Takahashi¹, Sayaho Atsumi¹, Ryota Umeki¹, Yutaro Eto¹, Mana Suzuki¹, Ryosuke Yoshida¹ (1.Shimoda high school)

Keywords:wave, earthquake, string phone

Understanding wave propagation is useful to study various phenomena that occur on Earth including earthquakes. The string phone is a scientific handicraft in which the vibration of the voice propagates through the string between the two cups. The string and cup affects the propagation of sound waves. However, there are many possible combinations of string and cup materials. In this study, we focused on the material and length of the string and investigated the sound propagation with an oscilloscope. First, a 25 m nylon string halved the intensity of the sound waves. Second, copper wire was easier to propagate sound than nylon. In addition, we explored the joints of string phones with cups and the bending of its string.