Vox Maris (musical instrument)

The Vox Maris ("Sound of the Sea") is an instrument that was built for the Yeosu Expo 2012 in Korea by the German organ building company Hey Orgelbau () and was recognized as the acoustic signet of the exposition. It combines elements of the pipe organ and the steam whistle. The Vox Maris entwines itself around the twin sky towers at a height of . It is considered an aerophone, since its dynamic high pressure organ pipes are powered by air. It can be played from a wireless tablet-pc.
The construction process was documented by a film team of German Bavarian Television.
On 21 October 2011, Guinness World Records confirmed the Vox Maris as the loudest pipe organ in the world, producing a reading of 138.4 dbA.
In 2015, the RID (Rekord-Institut für Deutschland) corroborated the Vox Maris as the loudest pipe organ.