Synchronization of Sound Sources

Details Synchronization of Sound Sources Synchronization of Sound Sources

2009-04-16

arxiv.org/abs/0904.2449v2

Phys. Rev. Lett. 103, 114301 (2009)

Physics

Classical Physics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.103.114301

Sound generation and -interaction is highly complex, nonlinear and self-organized. Already 150 years ago Lord Rayleigh raised the following problem: Two nearby organ pipes of different fundamental frequencies sound together almost inaudibly with identical pitch. This effect is now understood qualitatively by modern synchronization theory (M. Abel et al., J. Acoust. Soc. Am., 119(4), 2006). For a detailed, quantitative investigation, we substituted one pipe by an electric speaker. We observe that even minute driving signals force the pipe to synchronization, thus yielding three decades of synchronization -- the largest range ever measured to our knowledge. Furthermore, a mutual silencing of the pipe is found, which can be explained by self-organized oscillations, of use for novel methods of noise abatement. Finally, we develop a specific nonlinear reconstruction method which yields a perfect quantitative match of experiment and theory.

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