A New Method to Measure the Absorption Coefficient of the Automotive Driving Room Based on the Sound Pressure Delaying

Cong Yun Zhu; Jian Ru Shi; Shu Feng Yang

doi:10.4028/www.scientific.net/AMR.415-417.1350

Paper Titles

Effect of Annealing Temperature on the Properties of Silicon Crystal
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Characteristics of Two-Stage Γ-Gate on AlGaAs/InGaAs/AlGaAs DH-HEMTs by Using AlGaAs/InGaP Etching-Stop Layers
p.1327

Preparation of Y₄MgSi₃O₁₃:Tb³⁺,Ce³⁺ Green Emitting Phosphor for White Light Emitting Diodes and its Luminescence Study
p.1333

Experimental Verification of Circuit Analog of Three- and Four-Level Electromagnetically Induced Transparency
p.1340

A New Method to Measure the Absorption Coefficient of the Automotive Driving Room Based on the Sound Pressure Delaying
p.1350

Optical Study of Poly (9,9-Dioctylfluorene) Isolated by AIB₂OB₃ Flat Rafts
p.1355

Organic Light Emitting Diodes with Metallocene Compounds as Cathode Interfacial Layers
p.1360

Synthesis and Properties of Spirosilafluorene Oligomer
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2.1μm Room Temperature Continuous Waves Operation of InGaAsSb-AlGaAsSb Double-Quantum Well Laser
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 415-417A New Method to Measure the Absorption Coefficient...

A New Method to Measure the Absorption Coefficient of the Automotive Driving Room Based on the Sound Pressure Delaying

Abstract:

Absorption coefficient is an important parameter of the absorption function of the absorption material. Traditional measurement methods of absorption coefficient are standing wave tube and reverberation which have some shortcomings. In this paper, phase of the sound pressure measured by two equal distance microphones placed in the front of the absorption material is delayed in order to attain the absorption coefficient. At the last, an experiment for one absorption material is carried out, the experiment results compare with the results of the other methods above mentioned that denotes that the theory is correct and practicable.

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Periodical:

Advanced Materials Research (Volumes 415-417)

Pages:

1350-1354

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.415-417.1350

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Online since:

December 2011

Authors:

Cong Yun Zhu, Jian Ru Shi, Shu Feng Yang

Keywords:

Absorption Material, Reverberation, Standing Wave, Time Delaying

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