Weird 'singing' alarm sound Colwell Road

[siousxiesue]

I first became aware of this at 5.30am, it's a six note little noise, like someone singing opera lite-but it's so regular (still ongoing) and with a minute or so in between, the only thing I can think is it's some weird alarm type thing-I am in Colwell backing onto Playfield Cres, is anyone else hearing it or know what it is?

[eucalyptus]

I heard this too! keeerrr azy!

- Tim O'Leary.

[siousxiesue]

Thank god I'm not going mad...:-$