Traditionally the Helmholtz Resonator (HR) has been regarded as a mechanism for dissipating relatively small amounts sound energy. However, it is being realised that it has wide applications when considered as a tool for changing or matching acoustical impedance. This project is focussed on how to understand the design of HRs so they can fit within typical wall thicknesses and achieve significant wideband improvement of a wall’s sound insulation. This may be by applying the HRs as narrowband absorbers of the sound energy or by diverting the otherwise transmitted energy into evanescent waves. The work will be expected to involve 3D printing of sample HRs for testing It is a continuation project building on preliminary work undertaken in a 2017 FYP.
Undergraduate
An understanding of the different applications of HRs and developing an experimental rig to demonstrate these and measure their success. 3D printing of sample HRs for testing and measuring their performance. A particular focus will be on designing compact HRs suitable for fitting in typical double leaf wall cavities
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Acoustics Lab (City 422.154, Lab)