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EGO shape optimization of horn-loaded loudspeakers

Morgans, Rick C. / Zander, Anthony C. / Hansen, Colin H. / Murphy, David J.

Abstract Horn-loaded loudspeakers increase the efficiency and control the spatial distribution of sound radiated from the horn mouth. They are often used as components in cinema sound systems where it is desired that the sound be broadcast onto the audience uniformly at all frequencies, improving the listening experience. The sound distribution, or beamwidth, is related to the shape of the horn and can be predicted by numerical methods, such as the boundary-element or source-superposition method, however the cost of evaluating the objective function is high. To overcome this a surrogate optimization method called Efficient Global Optimization (EGO) was used with a spline-based parameterization to find the shape of the horn that gives a frequency-independent beamwidth, thus giving a high quality listening experience.

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EGO shape optimization of horn-loaded loudspeakers

Morgans, Rick C. / Zander, Anthony C. / Hansen, Colin H. / Murphy, David J.

Abstract Horn-loaded loudspeakers increase the efficiency and control the spatial distribution of sound radiated from the horn mouth. They are often used as components in cinema sound systems where it is desired that the sound be broadcast onto the audience uniformly at all frequencies, improving the listening experience. The sound distribution, or beamwidth, is related to the shape of the horn and can be predicted by numerical methods, such as the boundary-element or source-superposition method, however the cost of evaluating the objective function is high. To overcome this a surrogate optimization method called Efficient Global Optimization (EGO) was used with a spline-based parameterization to find the shape of the horn that gives a frequency-independent beamwidth, thus giving a high quality listening experience.

EGO shape optimization of horn-loaded loudspeakers

Morgans, Rick C. / Zander, Anthony C. / Hansen, Colin H. / Murphy, David J.

Abstract Horn-loaded loudspeakers increase the efficiency and control the spatial distribution of sound radiated from the horn mouth. They are often used as components in cinema sound systems where it is desired that the sound be broadcast onto the audience uniformly at all frequencies, improving the listening experience. The sound distribution, or beamwidth, is related to the shape of the horn and can be predicted by numerical methods, such as the boundary-element or source-superposition method, however the cost of evaluating the objective function is high. To overcome this a surrogate optimization method called Efficient Global Optimization (EGO) was used with a spline-based parameterization to find the shape of the horn that gives a frequency-independent beamwidth, thus giving a high quality listening experience.

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Title:

EGO shape optimization of horn-loaded loudspeakers

Contributors:

Morgans, Rick C. (author) / Zander, Anthony C. (author) / Hansen, Colin H. (author) / Murphy, David J. (author)

Published in:

Optimization and Engineering ; 9 ; 361-374

Publication date:

2007-11-21

Size:

14 pages

ISSN:

1573-2924 , 1389-4420

DOI:

https://doi.org/10.1007/s11081-007-9029-8

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Horn-loaded loudspeakers , Constant beamwidth , Surrogate optimization , Efficient global optimization Mathematics , Optimization , Engineering, general , Systems Theory, Control , Environmental Management , Operation Research/Decision Theory , Financial Engineering

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