Simple siren disc demonstration //. Homemade Science with Bruce Yeany

Here is a simplified version of the Seebeck siren disc that has been a classic physics demonstration showing the relationship between frequency and pitch. The siren disc has a long history is sound studies and was first introduced by Thomas Seebeck in 1841 as a method of generating pure tones. It continues to be a staple of high school and college physics classes as it visually demonstrates the production of sound by interrupting the air flow through a series of holes located on a spinning disc. 3 additional notes. gained from the comments Thomas Seebeck died in 1831. August Seebeck made the tone disk. Safety first, I should be wearing safety glasses, especially being near the spinning surface with my face CDs are meant to spin at 500 RPMs. and tend to explode around 30,000 RPMs, I measured the the highest speed reached by a CD on this device, around 3,200 RPMs. However, the holes and slots can weaken the plastic substantially and the slotted one broke when the balloon pump nozzle touched it. While I will still use the CD. discs already made, any future pieces will most likely be made out of the foam plate material.