SOUND EFFECTS Meinl's planetary tuned energy chimes are created using the calculations of Hans Cousto (The Cosmic Octave) to match the frequencies of the sun, moon and planets. Each chime is tuned to create the corresponding frequency of the celestial body. Manufactured from silver anodized aluminum alloy for accurate frequency. The decorative wood base is finished with an engraved logo and tuning symbol, and each bell comes with a wooden mallet that produces a clear, defined note to easily fill your space (small or large) with a relaxing sound. This mallet can be conveniently stored in the wooden base by placing it under the bell. These high quality energy chimes are ideal for therapeutic and meditation purposes, but they can also be used in classrooms or as a sound signal. Manufacturer's tip: Use the planetary energy chimes also in combination with the corresponding planetary tuning forks from Meinl Sonic Energy.