TY - JOUR
T1 - Acoustic behavior of porous ceiling absorbers based on local
and extended reaction (L)
AU - Gunnarsdóttir, Kristrún
AU - Jeong, Cheol-Ho
AU - Marbjerg, Gerd Høy
PY - 2015
Y1 - 2015
N2 - The acoustic behavior of ceiling absorbers can be pre
dicted under different surface reaction assump-
tions: Local and extended reaction. This study aims to
experimentally validate acoustic transfer func
tions near a ceiling absorber in an anechoic chamber
based on the two surface reaction models. First, a
ceiling absorber with two mounting conditions is mo
deled by equivalent fluid models, such as Delany-
Bazley’s, Miki’s, and Komatsu’s model, in various w
ays: (1) Local vs extended reaction and (2) planewave vs spherical-wave in
cidence. For a single absorber under an
echoic conditions, the acoustic transfer functions for four source-receiver pairs are simulated using a pressure-based image source model,
and then compared with measurements. For a rigid ba
cking condition, both the local and extended reaction models agree well with the measurement. For an absorber backed by an air cavity, the extended
reaction model agrees better at larger incidence an
gles at lower frequencies than the local reaction
model.
AB - The acoustic behavior of ceiling absorbers can be pre
dicted under different surface reaction assump-
tions: Local and extended reaction. This study aims to
experimentally validate acoustic transfer func
tions near a ceiling absorber in an anechoic chamber
based on the two surface reaction models. First, a
ceiling absorber with two mounting conditions is mo
deled by equivalent fluid models, such as Delany-
Bazley’s, Miki’s, and Komatsu’s model, in various w
ays: (1) Local vs extended reaction and (2) planewave vs spherical-wave in
cidence. For a single absorber under an
echoic conditions, the acoustic transfer functions for four source-receiver pairs are simulated using a pressure-based image source model,
and then compared with measurements. For a rigid ba
cking condition, both the local and extended reaction models agree well with the measurement. For an absorber backed by an air cavity, the extended
reaction model agrees better at larger incidence an
gles at lower frequencies than the local reaction
model.
U2 - 10.1121/1.4904541
DO - 10.1121/1.4904541
M3 - Journal article
C2 - 25618082
SN - 0001-4966
VL - 137
SP - 509
EP - 512
JO - Journal of the Acoustical Society of America
JF - Journal of the Acoustical Society of America
IS - 1
ER -