The Doppler Effect of a Sound Source Moving in a Circle

2003 ◽  
Vol 41 (2) ◽  
pp. 89-91 ◽  
Author(s):  
Marcelo M. F. Saba ◽  
Rafael Antônio da S. Rosa
Keyword(s):  
Sound Source ◽  
Doppler Effect ◽  
The Doppler Effect

Measurements of the Doppler effect due to a rotating sound source

2017 ◽  
Vol 142 (4) ◽  
pp. 2542-2542 ◽  
Author(s):  
Elizabeth McQueney ◽  
Maryam Landi ◽  
Likun Zhang
Keyword(s):  
Sound Source ◽  
Doppler Effect ◽  
The Doppler Effect

Relative Effectiveness of Three Stimulus Variables for Locating a Moving Sound Source

Perception ◽  
1987 ◽  
Vol 16 (2) ◽  
pp. 175-186 ◽  
Author(s):  
Lawrence D Rosenblum ◽  
Claudia Carello ◽  
Richard E Pastore
Keyword(s):  
Sound Source ◽  
Doppler Effect ◽  
Relative Effectiveness ◽  
Relative Importance ◽  
Amplitude Change ◽  
Temporal Differences ◽  
Environmental Situation ◽  
Stimulus Variable ◽  
The Doppler Effect ◽  
Moving Sound Source

A study is reported in which it is shown that observers can use at least three types of acoustic variables that indicate reliably when a moving sound source is passing: interaural temporal differences, the Doppler effect, and amplitude change. Each of these variables was presented in isolation and each was successful in indicating when a (simulated) moving sound source passed an observer. These three variables were put into competition (with each indicating that closest passage occurred at a different time) in an effort to determine their relative importance. It was found that amplitude change dominated interaural temporal differences which, in turn, dominated the Doppler effect stimulus variable. The results are discussed in terms of two interpretations. First, it is possible that subjects based their judgements on the potential discriminability of each stimulus variable. However, because the stimuli used involved easily discriminable changes, subjects may instead have based their judgements on the independence of a stimulus variable from different environmental situation conditions. The dominance ordering obtained supports the second interpretation.

ON THE THEORY OF THE DOPPLER EFFECT IN A MOVING MEDIUM

1998 ◽  
Vol 13 (01) ◽  
pp. 1-6 ◽  
Author(s):  
BRUNO BERTOTTI
Keyword(s):  
Solar Wind ◽  
Doppler Effect ◽  
Dispersive Medium ◽  
Time Derivative ◽  
Optical Path ◽  
Moving Medium ◽  
Perturbation Theorem ◽  
Hamiltonian Theory ◽  
The Doppler Effect ◽  
Definition Of

The increase in the accuracy of Doppler measurements in space requires a rigorous definition of the observed quantity when the propagation occurs in a moving, and possibly dispersive medium, like the solar wind. This is usually done in two divergent ways: in the phase viewpoint it is the time derivative of the correction to the optical path; in the ray viewpoint the signal is obtained form the deflection produced in the ray. They can be reconciled by using the time derivative of the optical path in the Lagrangian sense, i.e. differentiating from ray to ray. To rigorously derive this result an understanding, through relativistic Hamiltonian theory, of the delicate interplay between rays and phase is required; a general perturbation theorem which generalizes the concept of the Doppler effect as a Lagrangian derivative is proved. Relativistic retardation corrections O(v) are obtained, well within the expected sensitivity of Doppler experiments near solar conjunction.

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