GTAA aviation sound level readings – Arrivals

The following sound level readings were taken on the evening of March 31st, at two locations in North Toronto.
It took at least one year of complaints to get GTAA to come out to these neighbourhoods and take sound- level readings with portable instrumentation.

GTAA sound level readings – arrivals

Location #1 (Davisville Village) sound readings were taken from after 9:00 p.m. till appox. 10:00 p.m. Due to traffic noise from Mt. Pleasant Rd. and the flight patterns, these readings were inconclusive to demonstrate the noise from arrival aircraft.
Location #2 (Mt. Pleasant and Lawrence area) had sound level readins taken from approx. 10:00 p.m. till 11:00 p.m. All readings were taken by GTAA Noise Mgmt. office staff, using a dBA scale meter. The only signigicant factor, aside from the excessive traffic in the evening over the resident’s home, is that the loudest reading for an arrival (A320) was 65 dBA at 3600 feet ASL. The lowest ambient noise reading during this monitoring period was 50 dBA.

Therefore, it has been proved the worst case is a 15dBA delta – a noticeable difference experienced by the residents while attempting to retire for the evening.

GTAA has advised they have taken readings for departure traffic in Location #1 – Davisville Village. These results have not been produced at time of writing. A note to Tim Kendall (GTAA Mgr. Airside Operations – Noise Mgmt. office) will be sent for follow-up.

GTAA-Area Of Responsibility

GTAA area of responsibility is 10 nautical miles. This radius extends to slightly eastward, beyond Lawrence Park Ratepayer Association boundary and South Eglinton Residents and Ratepayer Association boundary
- to Rumsey Rd. in Leaside.

Research indicates that departure aircraft frm runway 06 transit this area at speeds of approx. 250 kts (knots) – expected to be a lower/quieter power setting, and at approx. 9 to 10 nautical miles from Pearson airport, pilots set the aircraft flight director to climb power, a higher/noisier power setting.

GTAA-AreaOfResponsibility-20090730