Akademik Veri Yönetim Sistemi
JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, cilt.39, sa.3, ss.1417-1426, 2024 (SCI-Expanded)
Conventional sound-absorbing materials such as mineral wool
and perforated panels have inadequate acoustic performance in the low-frequency
region. On the other hand, acoustic metasurfaces can provide high absorption
with subwavelength thickness in the desired frequency range according to their
structural properties. Herein, we present the effects of changes in geometric
parameters of a sound-absorbing metasurface on acoustic performance. The
metasurface consists of a perforated panel in its outer layer and coiled-up
channels behind the panel. The impacts of hole numbers, panel thickness, hole
diameter and channel depth parameters on sound absorption performance were
examined. Acoustic analyses were performed with the Pressure Acoustics module
of COMSOL MultiPhysics. Theoretical and numerical results are in agreement. The
metasurface provides perfect sound absorption in the desired frequency range
with an ultra-thin scale. That makes it an alternative to traditional materials
in room acoustics and noise control.