Sonometer

A sonometer is a musical instrument that scientists use to study the physics of sound. It's kind of like a long, skinny wooden box with a thin metal wire stretched across it. When you pluck the wire or hit it with a small hammer, it vibrates and creates a sound.

To play the sonometer, you use your fingers or the hammer to create different pitches by changing the tension on the wire. The higher the tension, the higher the pitch. The lower the tension, the lower the pitch.

Scientists use the sonometer to study the physical properties of sound waves. They measure the frequency of the sound waves (how many times the wire vibrates per second) and the amplitude (how loud the sound is). They can also study how different materials affect the sound waves by placing objects on the wire or changing the length of the wire.

Overall, the sonometer is a tool that helps scientists better understand how sound works and how it can be manipulated to make music or communicate information.