Nonlinear acoustics in cicada mating calls enhance sound propagation
| Autor: | Derke R. Hughes, Richard A. Katz, Albert H. Nuttall, G. Clifford Carter |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Male
Sound Spectrography Acoustics and Ultrasonics Sound transmission class Computer science Acoustics Population Models Biological Sonar Signal Hemiptera Motion Sexual Behavior Animal Nonlinear acoustics Arts and Humanities (miscellaneous) Animals Quantitative Biology::Populations and Evolution education Decorrelation education.field_of_study Signal Processing Computer-Assisted Acoustic wave Sound Nonlinear Dynamics Female Vocalization Animal Acoustic resonance |
| Zdroj: | The Journal of the Acoustical Society of America. 125:958-967 |
| ISSN: | 0001-4966 |
| DOI: | 10.1121/1.3050258 |
| Popis: | An analysis of cicada mating calls, measured in field experiments, indicates that the very high levels of acoustic energy radiated by this relatively small insect are mainly attributed to the nonlinear characteristics of the signal. The cicada emits one of the loudest sounds in all of the insect population with a sound production system occupying a physical space typically less than 3 cc. The sounds made by tymbals are amplified by the hollow abdomen, functioning as a tuned resonator, but models of the signal based solely on linear techniques do not fully account for a sound radiation capability that is so disproportionate to the insect's size. The nonlinear behavior of the cicada signal is demonstrated by combining the mutual information and surrogate data techniques; the results obtained indicate decorrelation when the phase-randomized and non-phase-randomized data separate. The Volterra expansion technique is used to fit the nonlinearity in the insect's call. The second-order Volterra estimate provides further evidence that the cicada mating calls are dominated by nonlinear characteristics and also suggests that the medium contributes to the cicada's efficient sound propagation. Application of the same principles has the potential to improve radiated sound levels for sonar applications. |
| Databáze: | OpenAIRE |
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