Shortly after moving into a new area in Toronto, I noticed a high-pitched, electronic sounding noise outdoors. It's really putting a damper on my enjoyment of my otherwise lovely deck. Can you help identify it? (Recording and details inside)
Here's what I know:
- it was present in November when we moved in and continues until now. According to a neighbour, it has been present at least a year; it happens at any time of day or night.
- it comes and goes at random apparently, and duration is not fixed either. It lasts anywhere from about 3 to 10 seconds (roughly); there doesn't seem to be any connection to the wind or other environmental factor
- it varies in volume from barely audible to loud enough to hear indoors with the windows open, but there seems to be no pattern to it
- it usually comes as a two-tone noise (low-high), sort of like the bosun's whistle sound. But rarely it comes as a multi-pitch sound (three or four 'notes')
- it has an electronic feel to it; the tones are very pure but at the same time seem to fade in/out very smoothly and gradually
- it's hard to pinpoint the source, but it seems to be coming from one street over (i.e. the row of houses behind me), but a few houses south. I've walked over to look, but doesn't seem to be coming from the street or front of the homes. So maybe it's something in someone's backyard? Perhaps a pump or transformer malfunctioning? I live in the Swansea area of Toronto, for those who are familiar with the area.
This is really driving me nuts! Before I go knocking on random doors with vague rants about noises, can anyone suggest what I might be looking for?
I've recorded it, although it's a bit faint at the moment. You can hear it here: https://soundcloud.com/hgirlto/weird-noise
. It starts at around the 4 second mark. Thanks!