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.
Thanks for your comments,
Wilson J. Gonzalez-Espada, Ph.D.
Asst Professor of Physical Science/Science Education
School of Physical and Life Sciences
Arkansas Tech University
1701 N. Boulder Ave. (McEver Hall)
Russellville, AR 72801
(479) 968-0293
(479) 964-0837 fax
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