2009 · 13 citations · 5 references
Natural SciencesMaterials EngineeringMaterials ScienceAcoustic DesignAcousticsMaterials CharacterizationAcoustic MaterialsAcoustic MeasurementAcoustic ModelingSound AbsorptionAcoustic Absorption MaterialsAcoustic Characterization Of MaterialsAcoustic Material CharacterizationAcoustic Transfer FunctionsMaterial Acoustic PropertiesNormal Incidence Sound AbsorptionSound Absorption MeasurementTransmission Loss Prediction
A new ASTM standard has been adopted for characterizing acoustical materials in a tube. This new standard is ASTM E2611�09, Measurement of Norma l Incidence Sound Transmission of Materials Based on the Transfer Matrix Method. This test method describes the use of a tube, four microphones, and a digital frequency analysis system for the measurement of normal incidence transmission loss and other important acoustical properties of materials by determination of the sample’s acoustic transfer matrix. This four microphone test method is similar to Test Method E�1050�08, which utilizes a two microphone technique to calculate acoustical material properties, in that it also uses a tube with a sound source connected to one
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