Doppler was the life and soul, wherever he showed his face.

      At home, at work, at parties, just about any place.

       Then one day Christian Doppler, discovered an effect

       His friends all thought he'd lower the tone,

      So his social life was wrecked.

But pedantic Mr Doppler said, “That’s only when I leave.

As I arrive the tone goes up. At least that’s what you’ll perceive."

Now things have got much better for clever Mr. D.

He’s asked to go to parties, with increased frequency.