Helpful Links

Informational Card

In the last few months, we have developed a logo for the Decibel Coalition and an informational postcard seen below, on the legal requirements for mufflers and Captain’s Choice devices in Canada. If you would like to learn more about this initiative or receive a copy of the informational postcard on mufflers and Captain's Choice devices please email

Technical Information About Sound and Noise

How loud is too loud

How do we measure sound waves?

What are decibels, the decibel scale & noise measurement units?

Existing Legislation


Summary of US State Regulations