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Have any one heard of an easy way to measure the change in the
frequency of a sound source when the source is moving linearly with
constant acceleration toward a stationary observer? As you know, the
Doppler effect describes, among other scenarios, the change in
perceived frequency of a sound source when the object is moving with
constant speed toward a stationary observer. A colleague and I were
having a discussion about that. Since he is a physicist and I am a
science educator, I am almost sure he is correct when he argues it
cannot be done. However, common sense tells me that if a sound-
emitting object is moving with constant acceleration, the perceived
sound frequency should change in a predictable way. This case should
not be confused with a common demonstration of Doppler effect using
a rotating sound source.