The singer's voice reminds me of Brendan Perry from Dead Can Dance.

Dead Can Dance is a band comprising Lisa Gerrard and Brendan Perry. Formed in Melbourne in 1981 and initially based in Australia, it disbanded in 1998 but reunited temporarily for a world tour in 2005.

Assigning a musical genre to Dead Can Dance is difficult, as its style is particularly eclectic. However, its early work could be considered "darkwave". In their later work, including and subsequent to the release entitled The Serpent's Egg, Dead Can Dance would take ancient or various musics from around the world as primary sources, with Gerrard singing glossolalia, giving it a very distinctive style. As a result, their later albums sound quite different from the first three. Various sources have labelled those latter releases as neo-classical, ethereal or dark world music.

http://en.wikipedia.org/wiki/Dead_can_dance

This is my favorite part of the critically acclaimed film Baraka by Ron Fricke, the cinematographer for Koyaanisqatsi.

In addition to making comparisons between natural and technological phenomena, such as in Koyaanisqatsi, Baraka searches for a universal cultural perspective: for instance, following a shot of an elaborate tattoo on a Japanese bather with one of Native Australian tribal paint.

The title Baraka is a word which means blessing in many different languages. The score provided by Brendan Perry and Lisa Gerrard (from Dead Can Dance) and Michael Stearns is noticeably different from the minimalist one provided by Philip Glass for Koyaanisqatsi. Notable music was also contributed by the band Brother.

I urge people to watch the film in it's entirety in the links provided here.