04 August 2008

Question of the day - 4 August 2008

What is the name of the effect that makes the sound of an ambulance siren change as it passes by?

Quel est le nom de l'effet qui fait que le son de la sirène d'une ambulance change en passant?

3 comments:

Karl said...

The "bee-baw" effect?

Anonymous said...

L'effet Doppler

Mr Quiz in Paris said...

"Anonymous" had the correct answer: the Doppler effect.