Laser-Doppler Vibrometer Measurements of Leaves

  • M. J. M. Martens
Part of the Modern Methods of Plant Analysis book series (MOLMETHPLANT, volume 11)


In recent years, interest in the effects of vegetation on sound absorption has increased because of the possible use of vegetation in noise pollution abatement (e.g. Martens 1986). Furthermore, there is an increasing interest in the effects of vegetation on sound produced by animals during vocalisation (Foppen and Martens 1986, Martens and Huisman 1987). Sound waves induce resonances (Embleton 1966) and vibrations in plant material (Attenborough and Hess 1988, Martens et al. 1982), and part of the incident energy is absorbed by the plant material by converting the kinetic energy of the vibrating air molecules in a sound field into a pattern of vibrations of, for example, a plant leaf. Part of the vibration energy of the air molecules is lost as heat, since friction occurs in a vibrating leaf (Martens and Michelsen 1981).


Fundamental Frequency Sound Field Vibration Velocity Anechoic Chamber Leaf Cutting 
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© Springer-Verlag Berlin Heidelberg 1990

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  • M. J. M. Martens

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