Wind Buoy consists of two identically tuned components—a rectangular steel box and a stainless steel pipe. When the attached rubber mallet strikes the pipe, the pipe vibrates softly with a very distinct tone. The vibrations of the pipe are mechanically connected to the end ofthe steel box, which then begins to vibrate at the exact same tone only to be amplified and broadcast out of the four-inch diameter hole. Both the box and the pipe are tuned to the same frequency; they are said to be in resonance.
The Wind Buoy shown vibrates at approximately 175 cycles per second (roughly the note of F below middle C).

Dimensions: 27.5”H x 10.5 x 10.5 box, plus 3’ pipe