EVALUATION OF TORTUOSITY IN ACOUSTIC POROUS MATERIALS SATURATED BY AIR

被引：124

作者：

ALLARD, JF ^{[1
]}

CASTAGNEDE, B ^{[1
]}

HENRY, M ^{[1
]}

LAURIKS, W ^{[1
]}

机构：

[1] KATHOLIEKE UNIV LEUVEN,DEPT NATUURKUNDE,AKOESTIEK WARMTEGELEIDING LAB,B-3001 LOUVAIN,BELGIUM

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1994年 / 65卷 / 03期

关键词：

D O I：

10.1063/1.1145097

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Tortuosity is an important parameter for the prediction of the acoustical properties of porous sound absorbing materials. The evaluation of tortuosity by resistivity measurements is now used in several laboratories, although this method presents several drawbacks. In particular, the complete saturation by a conducting fluid of a porous foam having a high flow resistivity is difficult to obtain without partially damaging the structure of the cells. A simple technique based on ultrasonic wavespeed measurements in a material saturated by air is described. This method has been used previously only for water or superfluid helium saturated materials.

引用

页码：754 / 755

页数：2

共 9 条

[1]

Allard J. F., 1993, PROPAGATION SOUND PO

[2] THEORY OF PROPAGATION OF ELASTIC WAVES IN A FLUID-SATURATED POROUS SOLID .1. LOW-FREQUENCY RANGE [J].

BIOT, MA .

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1956, 28 (02) :168-178

[3] CONNECTION BETWEEN FORMATION FACTOR FOR ELECTRICAL-RESISTIVITY AND FLUID-SOLID COUPLING FACTOR IN BIOT EQUATIONS FOR ACOUSTIC-WAVES IN FLUID-FILLED POROUS-MEDIA [J].

BROWN, RJS .

GEOPHYSICS, 1980, 45 (08) :1269-1275

[4] DYNAMIC TORTUOSITY AND BULK MODULUS IN AIR-SATURATED POROUS-MEDIA [J].

CHAMPOUX, Y ;

ALLARD, JF .

JOURNAL OF APPLIED PHYSICS, 1991, 70 (04) :1975-1979

[5] TORTUOSITY AND ACOUSTIC SLOW WAVES [J].

JOHNSON, DL ;

PLONA, TJ ;

SCALA, C ;

PASIERB, F ;

KOJIMA, H .

PHYSICAL REVIEW LETTERS, 1982, 49 (25) :1840-1844

[6] THEORY OF DYNAMIC PERMEABILITY AND TORTUOSITY IN FLUID-SATURATED POROUS-MEDIA [J].

JOHNSON, DL ;

KOPLIK, J ;

DASHEN, R .

JOURNAL OF FLUID MECHANICS, 1987, 176 :379-402

[7]

JOHNSON DL, 1986, 93 ENR FERM

[8] CHARACTERISTIC DIMENSIONS AND PREDICTION AT HIGH-FREQUENCIES OF THE SURFACE IMPEDANCE OF POROUS LAYERS [J].

LAFARGE, D ;

ALLARD, JF ;

BROUARD, B ;

VERHAEGEN, C ;

LAURIKS, W .

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1993, 93 (05) :2474-2478

[9] SLOW-WAVE PROPAGATION IN AIR-FILLED PERMEABLE SOLIDS [J].

NAGY, PB .

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1993, 93 (06) :3224-3234

← 1 →