Author: Erling Nilsson

Good acoustics with Wall Panels

As a complement to an acoustic ceiling it is sometimes useful to attach absorbing panels to the walls. This could be the case when a disturbing flutter echo is present or expected and gives an unpleasant coloration to the sound. Another situation is when the amount of sound diffusing objects is small, resulting in long […]

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Acoustics miscellaneous 220

Background to the European Standard EN 12354, part 6

In the latest issue of Acta Acoustica united with Acustica, Eddy Gerritsen (TNO) discusses engineering methods for the prediction of reverberation time and sound pressure levels in spaces with non-diffuse conditions. The assumptions and theoretical considerations behind the formulas in EN 12354-6 annex D are clarified. There is definitely a need for engineering models to […]

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Acoustic Standards 77