Why did my car horn change pitch?
Why did my car horn change pitch? This phenomenon is known as the doppler effect; and for all practical purposes, it sounds like the car horn actually changed pitch, dropping off after the car horn passed the microphone. A car horn is close enough to the sound of a musical instrument for George Gershwin to imitate a car horn in An American in Paris. Why does my car have 2 horns? Two horns gives two notes, the result is a chord which sounds better than just a basic on note 'parp'. The interval between the notes is most commonly a...