At the moment, the tendency in the composites field, is to use natural resins and fibers to obtain �environmental friendly� materials, that are compostable and biodegradable. In this paper there is an experimental study of the depletion capacity of the vibration from the composite beams, using the hardener made of cotton, flax, hemp, silk textile and the three types of the Dammar hybrid resin matrix. The damping factor and the eigenfrequency of the vibrations was determined experimentally for

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... ese bars. Based on the acquired results, the dynamic elasticity modulus and the loss factor were calculated, for each composite material studied.