Otto is short for osteophonic, which means to vibrate the bones. These tuning forks have weights on the ends. When you tap these forks, they vibrate more than those that don’t have weights. The vibration is transferred to tissue and bone by placing the stem of the fork on the body.
The 32 Hz fork is the longest of the 3 Otto forks and vibrates so low that it sounds more like a buzz than a note – if you can hear it. It is recommended for use in stimulating the lymph system by moving it close to the skin. It feels almost like a slight breeze along the skin.
An activator is not recommended for this tuning fork. Because of it’s length, it’s best to tap it gently on the palm of your hand.