Good article (in French) on sound art, soundmaps and soundwalks written by Jean-Yves Leloup
"De la toile ŕ l’espace urbain : art sonore, soundmaps et soundwalk"
http://www.culturemobile.net/artek/revolution-geolocalisation-sons
http://www.culturemobile.net/artek/revolution-geolocalisation-sons/entre-oeuvre-art-et-reseau-social
http://www.culturemobile.net/bio/artistes/artistes-sonores-et-geolocalisation