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An efficient loudspeaker horn designed by numerical optimization: an experimental study
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för datavetenskap. (Design Optimization)
Uppsala University, Department of Information Technology, Division of Scientific Computing.
D.A.S. Audio S.A., Valencia, Spain.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för datavetenskap. (Design Optimization, UMIT)
Vise andre og tillknytning
2010 (engelsk)Rapport (Annet vitenskapelig)
Abstract [en]

Using rapid prototyping, we manufacture an acoustic horn designed by gradient-based shape optimization to have virtually perfect impedance-matching properties. The horn is 161.5 mm long, has a mouth diameter of 300 mm, and a throat diameter intended for a 1.5 inch driver. We optimize the horn with the aim of having perfect radiation efficiency at 31 frequencies in the range 1.6–9.05 kHz, while satisfying a convexity constraint on the flare. The acoustical properties, as needed by the optimization algorithm, are calculated through numerical solutions with the finite-element method of the axisymmetric Helmholtz equation. The prototype has been analyzed in an anechoic chamber. In the design frequency band, the acoustic input impedance agrees reasonably well with the ideal characteristic impedance of a waveguide with the same cross sectional area as the horn throat.

sted, utgiver, år, opplag, sider
Umeå: Department of Computing Science, Umeå University , 2010. , s. 15
Serie
Report / UMINF, ISSN 0348-0542 ; 10.01
Emneord [en]
loudspeaker horns, shape optimization, Helmholtz equation, acoustics, rapid prototyping
HSV kategori
Identifikatorer
URN: urn:nbn:se:umu:diva-40310OAI: oai:DiVA.org:umu-40310DiVA, id: diva2:399246
Tilgjengelig fra: 2011-02-21 Laget: 2011-02-21 Sist oppdatert: 2018-06-08

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Noreland, DanielWadbro, EddieBerggren, Martin

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