The Town lists these as the prohibited noises; the by-law itself is the full text.
What hours can construction make noise?
Construction noise is prohibited from 7 p.m. to 7 a.m. Monday to Saturday, and prohibited all day on Sundays and statutory holidays.
A homeowner doing their own renovation, such as a fence or deck, is held to the 7 p.m. to 7 a.m. rule but may work on Sundays and holidays within permitted hours, as long as the work needs no building permit and no contractor is involved.
Source: Town of Oakville, Noise and nuisance concerns
When can I mow the lawn or use a leaf blower?
Not between 9 p.m. and 7 a.m. Yard maintenance tools are prohibited in those hours; snow removal equipment is the one exception.
Source: Town of Oakville, Noise and nuisance concerns
How loud can music, speakers or an outdoor TV be?
Between 7 p.m. and 7 a.m. an amplification device is prohibited if it is clearly audible from a neighbouring property. Between 7 a.m. and 7 p.m. the sound may not exceed 50 dBA measured with a noise meter.
Source: Town of Oakville, Noise and nuisance concerns
Is a barking dog a by-law matter?
Yes. Persistent noise from animals is prohibited at all times, and pest deterrent devices are prohibited at all times.
Source: Town of Oakville, Noise and nuisance concerns
What counts as excessive motorcycle noise?
An exhaust that emits more than 92 decibels at idle, which the Town says most stock motorcycles stay under unless the exhaust has been modified or replaced. It is prohibited at all times.
Source: Town of Oakville, Noise By-law
Do fireworks count?
Yes: fireworks are prohibited at all times except where another Town by-law permits them, which is around Victoria Day, Canada Day and New Year's.
Source: Town of Oakville, Noise and nuisance concerns