On the role of hanging baffle performance enhancement by using slotted Helmholtz resonator array

8th International Conference on Physics and its Applications

Hanina, R.^1 ; Yahya, I.^1 ; Harjana^1

Iwany Acoustics Research Group (IARG), Physics Department, Universitas Sebelas Maret, Jl. Ir. Sutami 36A, Kentingan, Surakarta, Indonesia^1

关键词: Broadband absorption;    Experimental investigations;    Helmholtz resonators;    Noise reverberations;    Performance enhancements;    Reverberation time;    Sound absorption coefficients;    Viscous damping;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/776/1/012066/pdf
DOI  :  10.1088/1742-6596/776/1/012066

来源: IOP

【 摘 要 】

This paper emphasizes on the experimental investigation performance of hanging baffle with slotted Helmholtz resonator array inclusion. Laboratory test procedure refers to ATMS E-1050 was conducted for measuring the sound absorption coefficient of the Helmholtz resonator, while interrupted noise reverberation time measurement refers to ISO 3382-2 has been done for room acoustic performance test of the proposed design hanging baffle. The result shows that broadband absorption occurs when the Helmholtz resonator inserted to the hanging baffle. Sound energy dissipation increase both in resonance and viscous damping mechanism. It reduces the reverberation time significantly in all frequencies. The proposed design slotted resonator inclusion has brought opportunity for tuning the response and performance of the hanging baffle.