The Doppler effect isthe change in pitch (frequency) of sound from a source (s) as heard by anobserver (o) when one or both are in motion. If we assume both the source andthe observer are moving in the same direction, the relationship is f^(')=f[a]((v-v[o])/(v-v))
Where: f^(‘)=perceived pitch by the observer
F[a]=actualpitch of the source
V=speedof sound in air (assume 772.4 mph)
V[o]=speedof observer
V=speedof source
Suppose that you are traveling down the road at 45mph andyou hear an ambulance (with siren) coming toward you from the rear. The actualpitch of the siren is 600 hertz (Hz).
A. Writea function f^(‘)(v) that describes this scenario.
B. Iff^(‘)=620 Hz find the speed of the ambulance.
C. Graphthe function and determine using the trace function what is the pitch perceivedby the observer when the speed of the source is 80mph.
Where: f^(‘)=perceived pitch by the observer
F[a]=actualpitch of the source
V=speedof sound in air (assume 772.4 mph)
V[o]=speedof observer
V
Suppose that you are traveling down the road at 45mph andyou hear an ambulance (with siren) coming toward you from the rear. The actualpitch of the siren is 600 hertz (Hz).
A. Writea function f^(‘)(v
B. Iff^(‘)=620 Hz find the speed of the ambulance.
C. Graphthe function and determine using the trace function what is the pitch perceivedby the observer when the speed of the source is 80mph.