DEVICE FOR ASSESSING THE FLOW RESISTIVITY OF ACOUSTIC ABSORBING FIBROUS MATERIALS
In the present paper a device for the sound absorbing materials air flow resistivity evaluation is presented. A list of fibrous absorbing materials have been tested by using the designed device. The flow resistivity is assessed from the air flow velocity and the pressure drop on the samples. The resulted flow resistivity is slowly increasing with the air flow velocity. In the next step the results are to be validated based on similar samples by using an impedance tube when the sound absorption coefficient will be measured.
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