Several explanations on the theoretical formula of Helmholtz resonator

L Li, Y Liu, F Zhang, Z Sun - Advances in Engineering Software, 2017 - Elsevier
Helmholtz resonator is one of the most basic acoustic models in acoustic theoretical
research and engineering applications. It is simple and effective to directly apply the …

Investigation of acoustic efficiency of wood charcoal in impedance tube for usage in sound-reflective devices

O Khrystoslavenko, R Grubliauskas - Sustainability, 2022 - mdpi.com
Charcoal is an environmentally friendly, biodegradable, and economical material. This
material is usually produced by slow pyrolysis—the heating of wood or other substances in …

On the role of acoustical improvement and surface morphology of seashell composite panel for interior applications in buildings

E Setyowati, G Hardiman, Purwanto, MA Budihardjo - Buildings, 2019 - mdpi.com
This manuscript focuses on the acoustical behaviors and surface morphology of seashell
waste filler reinforced polyester (SFRP) coverings Anadara granosa Linn, Perna viridis Linn …

[PDF][PDF] Experimental Studies of the Sound Scattering Coefficient of the Diffuser in the Reverberation Chamber

O Khrystoslavenko, R Grubliauskas - Environmental and Climate …, 2023 - sciendo.com
Wood charcoal is a sustainable, renewable, and environmentally friendly material with the
use that the acoustic device can produce. Charcoal made of wood waste materials allows for …

[PDF][PDF] Investigation of Acoustic Efficiency of Wood Charcoal in Impedance Tube for Usage in Sound-Reflective Devices. Sustainability 2022, 14, 9431

O Khrystoslavenko, R Grubliauskas - 2022 - researchgate.net
Charcoal is an environmentally friendly, biodegradable, and economical material. This
material is usually produced by slow pyrolysis—the heating of wood or other substances in …

Acoustic performance of porous sound absorber based on Sterculia foetida Linn

AS Kusrini, I Yahya, H Harjana… - AIP Conference …, 2019 - pubs.aip.org
The acoustical properties of sustainable sound absorber materials made from Sterculia
foetida Linn fruit bunch fibers and natural latex were investigated. The random fibers were …