Do you know this tune?

Ben’s been whistling this tune without knowing what it is:

[player file=http://traffic.libsyn.com/haawebsite/whistle.mp3]Ben’s whistle[/player]

It’s annoyed him for 3 months & annoyed us for 1 hour. Can you help?

…NEWS FLASH! You did help! Thanks for all the suggestions. Listen to what the whistle was and see if you got it right…

[player file=http://traffic.libsyn.com/haawebsite/Whistle_answer.mp3]What the whistle was[/player]