Pipe organ The Vox Maris ("Sound of the Sea")[1][2] is an instrument that was built for the Yeosu Expo 2012 in Korea by the German organ building company Hey Orgelbau (Hey Orgelbau [de])[3][4][5] and was recognized as the acoustic signet of the exposition.

The Vox Maris entwines itself around the twin sky towers at a height of 72 metres (236 ft).

[7] It is considered an aerophone, since its dynamic high pressure organ pipes are powered by air.

[8] The construction process was documented by a film team of German Bavarian Television.

[3][7][9] In 2015, the RID (Rekord-Institut für Deutschland) corroborated the Vox Maris as the loudest pipe organ.