Home › chapter › 10.57640 › DESIGN, MANUFACTURING AND VALIDATION OF A TEST FACILITY FOR TRANSMISSION LOSS MEASUREMENT

DESIGN, MANUFACTURING AND VALIDATION OF A TEST FACILITY FOR TRANSMISSION LOSS MEASUREMENT

Authors

G. Carducci, C. Casale, P. Russo, F. Marulo

Authors email address

G. Carducci: g.carducci1994@gmail.com
C. Casale: claudio.casale88@gmail.com
P. Russo: pa.russo15@gmail.com
F. Marulo: francesco.marulo@unina.it

Abstract

Traditional methods of measuring Sound Transmission Loss (SIL) of acoustic materials and treaiments are lime-consuming and expensive. To overcome this limitation, normal incidence Transmission Loss measurement technique using an impedance tube has been developed. This paper presents an effort made to design and build a cost-effective impedance tube as per the ASTM E2611 – 09. Standardized measurement uses a plane wave tube instrumented with four microphones and a termination consisting of an adaptable acoustic load. The mathematical formulation is based on the transfer Matrix representation (IM method). In order to validate the proposed model design, a numerical, experimental and theoretical correlation is presented. The numerical model is obtained using the Finite Element Method (FEM).

Therefore, the lest jacity operation has proved reliable.

Keywords

Sound Transmission Loss, 4-microphones impedance tube, Transfer Matrix method, finite element method.

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