This illusion creates more tones than the number of its tubes (such as low bass notes created in your ear)! We use a beautiful ancient tuning that is not heard on any modern instrument, and the result is as impressive as it is unique. This is called the natural harmonic overtone series. It will delight your ears and comfort your mind. This wind chime has an unusual shape and an interesting wave "clapper." It's the perfect gift for someone who likes something "a little different"!