The Journal of the Acoustical Society of America · 1977 · 156 citations · 6 references
Natural SciencesSoil SciencesAcousticsPropagationSoil PhysicsAcoustic Source ModelingAeroacousticsNoiseNoise PredictionSound AbsorptionSound TransmissionAbsorbent MaterialsAcoustic Absorption ModelingAcoustic Impedance EngineeringAircraft NoiseFibrous MaterialsImpedance Boundary ConditionsNoise ModellingSound Attenuation
This work expands on Delany and Bazley's original proposals for modeling sound propagation over soil surfaces (J. Sound Vib. 16:315–322, 1971). The paper aims to demonstrate that noise propagation over real soil surfaces can be modeled using fibrous absorbent material properties and finite impedance boundary theory. The authors model noise propagation over soil using fibrous absorbent material properties and finite impedance boundary theory, and apply this model to aircraft reverse thrust noise measurements.
The purpose of this paper is to show that the essential properties of the propagation of noise over real soil surfaces can be modeled using the properties of fibrous absorbent materials and the appropriate theory of sound propagation along a finite impedance boundary. This work is an expansion of the original proposals of Delany and Bazley [J. Sound Vib. 16, 315–322 (1971)]. The model predictions are shown to be in good agreement with a variety of experimental ground absorption measurements. The application of the model to the measurement of aircraft reverse thrust noise is described.
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Acoustical properties of fibrous absorbent materials
Mary Delany, E.N. Bazley · Applied Acoustics · 1970 · 1.9K citations
Natural Sciences, Materials Engineering, Materials Science +12