Title: Converting sunlight into audible sound: Some practical measurements on the Heliophone
Authors: Roozen, Bert
Lui, L.
Glorieux, Christ
Rychtarikova, Monika
Van der Donck, Tom
Jacobs, A.
Issue Date: 5-Sep-2016
Host Document: Proceedings of the 22nd International Congress on Acoustics, ICA 2016 pages:1-5
Conference: Proceedings of the 22nd International Congress on Acoustics, ICA 2016 location:Buenos Aires date:5-9 September 2016
Abstract: This paper presents measurement results obtained with a device called Heliophone. The Heliophone
collects and converts sunlight to sound without electronic amplification. Sun light is
focused to a photoacoustic piston surface in the photoacoustic cavity by means of a compound
parabolic collimator, and its intensity is modulated by a mechanical chopper. The photoacoustic
cell is connected to an acoustic horn, which acts as an impedance matching device between
the cavity and the open air environment, making the sound audible. Acoustic measurements are
presented, using sun light to drive the Heliophone.
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Soft Matter and Biophysics
Department of Materials Engineering - miscellaneous

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