Noise 13 : Noise means any sound which is present in the place of work whether it is wanted or not wanted, and includes sound energy of any frequency, whether or not capable of being perceived by the unaided human ear
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}