Illustrative example
A neighbour runs a generator for much of the day against a shared wall, and it is clearly audible in the bedroom on the other side. Two conversations have changed nothing.
Section 3479 covers anything offensive to the senses or interfering with the comfortable enjoyment of life or property, tested objectively rather than by the complainant's sensitivity. What the outcome turns on is duration and timing rather than volume alone, since an hour on a weekday afternoon and a run from early morning to late evening are different facts under the same words. The section sets no decibel limits, which come from local ordinances instead.
The generator is moved away from the shared wall and housed in an acoustic enclosure, and its use is confined to agreed hours on weekdays.