The Noisy Instrument by Jun Murakoshi won't play any beautiful music, but instead uses its distinct shape to produce a unique sound. Taking a page from seashells on the beach, those perpetual-noise machines, all you have to do is put it up to your ear and the subtle vibrations and air currents caused by having it there will stimulate your hearing in that airy way.

So as long as you aren't bashful — what with having something that looks like kelp attached to the side of your head — you can enjoy soothing sounds all day long.

Jun Murakoshi, via Pan-Dan