CSST Noise Monitoring Levels

The following data presents results of sound monitoring being completed by the City of Ottawa for the CSST project using sound monitors placed outside at residences near the various construction sites in New Edinburgh.

November 2018

September 2018

August 2018

July 2018

June 2018

May 2018

April 2018

March 2018

February 2018

January 2018

December 2017

November 2017

October 2017

September 2017

August 2017

July 2017

June 2017

May 2017

April 2017

The equivalent sound level (Leq, green line) and maximum sound level (Lmax, blue line) measurements are shown in decibels (dB) collected at the intersection of Queen Victoria Street and River Lane. The graphs show a measurement collected every minute, for the week.


Maximum sound level (Lmax): The maximum sound level occurring over a period of time.

Equivalent sound level (Leq): Essentially, Leq is an energy based average sound level over the period of time.  The Logarithmic Energy Equivalent Continuous Sound Level is the constant sound level over the time period in question, that results in the same total sound energy as the actual time varying sound. Leq must be associated with a time period. Leq is a measure of the total sound energy dose over a specified time period.

Decibel (dB): Sound levels are expressed in units of decibels. Sound level is 10 times the Logarithm of the squared ratio of the sound pressure over a reference pressure, 20 x 10-6 Pascals.

Fact Sheet on Noise – Occupational Exposure Limits in Canada