Transfer Matrix Approach to the Estimation of the Fundamental Acoustical Properties of Noise Control Materials

A new method for evaluating the acoustical properties of porous materials is described here. To implement the procedure, a two-microphone standing wave tube was modified to include: a new sample holder; a section that accommodated a second pair of microphones downstream of the sample holder; and an approximately anechoic termination. A four-point sound pressure method was then used to estimate the two-by-two transfer matrix of the material. The transfer matrix can then be used to determine the wave number and characteristic impedance of the material. The procedure has been used to estimate the acoustical properties of two glass fiber materials.

• Record URL:
  • https://doi.org/10.4271/1999-01-1667
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
• Supplemental Notes:
  • Abstract reprinted with permission of SAE International.
• Authors:
  • Song, Bryan H
  • Bolton, J
• Conference:
  • Noise & Vibration Conference & Exposition
  • Location: Traverse City Michigan, United States
  • Date: 1999-5-17 to 1999-5-20
• Publication Date: 1998-2-23

Language

• English

Media Info

• Media Type: Web
• Serial:
  • SAE Technical Paper
  • Publisher: Society of Automotive Engineers (SAE)
  • ISSN: 0148-7191
  • EISSN: 2688-3627
  • Serial URL: http://papers.sae.org/

Subject/Index Terms

• TRT Terms: Noise; Pitch (Acoustics); Pressure
• Subject Areas: Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01794699
• Record Type: Publication
• Source Agency: SAE International
• Report/Paper Numbers: 1999-01-1667
• Files: TRIS, SAE
• Created Date: Dec 9 2021 10:17AM