| Title |
An Experimental Study on the Absorption Performance of Steel-Wire Sound Absorbing Materials |
| Keywords |
Absorption coefficient ; 흡음계수 ; Characteristic impedance ; 특성임피던스 ; Impedance tube ; 임피던스관 ; Propagation constant ; 전파상수 ; Surface acoustic impedance ; 표면음향임피던스 ; Sound absorbing materials ; 흡음재 |
| Abstract |
The acoustic performances of steel-wire sound absorbing materials with different thicknesses and bulk densities were investigated experimentally. The well-known two-cavity method was used to measure the characteristic impedance, propagation constant and absorption coefficient. The normal absorption coefficients measured by two-cavity method agreed well with those by the two-microphone impedance tube method. The experimental results showed that the magnitude of the absorption coefficient and the frequency range of the maximum absorption coefficient were controllable by changing the thickness and bulk density of the steel-wire. Therefore, the steel-wires obtained from the crushed tire chips could be used as a good absorbing material. |