There exists an unequivocal distinction between the sound produced by a static source and that produced by a moving one, especially when the source moves towards or away from the microphone.
An important result is that for linear functionsf it is possible to recovers from observationsx up to certain symmetries, i.e., the model isidentifiable [8].
Let t beanother F analytic in t suchthat 0 = f0 and ( t) =( ft) forallt. Intherightfigurea volumepreservingtransfor applied (see Appendix C). 3: Smoothinvariantdeformations.