Transcription of 07 Sound Absorbing Materials - University of Kentucky
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07 Sound Absorbing Materials - University of Kentucky
D. W. Herrin, , University of Kentucky Department of Mechanical Engineering Sound Absorbing Materials Sound Absorption by Porous Materials Noise and Vibration Short Course 2 Dept. of Mech. Engineering University of Kentucky Overview D The Basics D Impedance and Absorption D Transfer Matrix Approach D Flow Resistivity Sound Absorption by Porous Materials Noise and Vibration Short Course 3 Dept. of Mech. Engineering University of Kentucky Relatively massive, stiff barrier having high damping Most Sound is reflected Some Sound is transmitted Less Sound is reflected Less Sound is transmitted ( These two objectives can be combined) Sound Blocking Versus Sound Absorption Sound Absorption by Porous Materials Noise and Vibration Short Course 4 Dept.
polyethylene, and polypropylene. DFoams are created by pouring premixed liquid products onto a conveyor and allowing the chemical process to create cells (voids) of various size as the foam cures and hardens. Similar to bread rising. DIf the cell walls are fractured, the foam is …
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