Physics 01
Why Does an Ambulance Siren Change Pitch as It Passes?
At 90 km/h a 700 Hz siren is heard at 755 Hz coming and 652 Hz going, 2.5 semitones apart. Here is the Doppler math, and how to read speed from the pitch.
At 90 km/h a 700 Hz siren is heard at 755 Hz coming and 652 Hz going, 2.5 semitones apart. Here is the Doppler math, and how to read speed from the pitch.