With Alberta adopting more stringent noise regulations in the 1980s and 1990s, MacDonald and his partners saw an opportunity to develop more sophisticated noise - abatement equipment, such as fan silencers and industrial - scale catalytic converters. (canadianbusiness.com)
Billed as a track - only function (thanks to the increase in decibels — likely to fall foul of noise regulations on actual track days), the system brings the Challenge another step closer to its racing cousins. (evo.co.uk)
We prepared a detailed document on how to revise noise enforcement regulations, another on how the approval process must be changed to protect health, and we submitted a document to the World Health Organization which is preparing global noise regulations for wind turbines. (windconcernsontario.ca)