2010/02/12 by Olivier Doutres, Yacoubou Salissou, Noureddine Atalla +1 · 1 citation
Engineering · Health Professions · Physics and Astronomy · #Acoustic Wave Phenomena Research #Acoustic attenuation #Acoustic impedance #Acoustic wave #Acoustics #Aerodynamics and Acoustics in Jet Flows #Attenuation #Bulk modulus #Composite material #Electrical impedance #Materials science #Microphone #Noise Effects and Management #Noise reduction coefficient #Optics #Physics #Porosity #Sound (geography) #Sound power #Sound pressure #Sound transmission class #Tortuosity #Tube (container) #Ultrasonic sensor #physics.class-ph
paper · pdf · doi:10.1016/j.apacoust.2010.01.007
published as Applied Acoustics 71, 6 (2010) 506-509
openalex publication_date 2010/02/12 · arxiv created 2010/08/05 · arxiv updated 2010/08/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
This paper presents a straightforward application of an indirect method based on a three-microphone impedance tube setup to determine the non-acoustic properties of a sound absorbing porous material. First, a three-microphone impedance tube technique is used to measure some acoustic properties of the material (i.e., sound absorption coefficient, sound transmission loss, effective density and effective bulk modulus) regarded here as an equivalent fluid. Second, an indirect characterization allows one to extract its non-acoustic properties (i.e., static airflow resistivity, tortuosity, viscous and thermal characteristic lengths) from the measured effective properties and the material open porosity. The procedure is applied to four different sound absorbing materials and results of the characterization are compared with existing direct and inverse methods. Predictions of the acoustic behavior using an equivalent fluid model and the found non-acoustic properties are in good agreement with impedance tube measurements.