A Hand Crafted Bell Made From a Modified Piece of Steel Pipe That Rings Two Notes at Once

Expert woodworker and engineer Matthias Wandel created a unique singing bell that rings in two different tones. Using the concepts behind the Lissajous Curve, Wandel sanded down a section of steel pipe in four equidistant spots and then struck the pipe bell crossways so that it rang two notes at once, specifically an rough major third of A and C#. Additionally, Wandel demonstrated how the tones would alternate when he spun the bell.

The key is multiple modes of vibration. Expanding on this, I experimented with making a bell that sounds two distinct notes…But the coolest feature of this “bell” is that if I strike it so both notes sound, then spin it, you can hear the two pitches alternate. That’s because each of the two main modes of vibration sends sound in different directions.

Bell Sanding

Bell C#

Bell A

Lori Dorn
Lori Dorn

Lori is a Laughing Squid Contributing Editor based in New York City who has been writing blog posts for over a decade. She also enjoys making jewelry, playing guitar, taking photos and mixing craft cocktails.