The accuracy of a method [Wijnant et al., “Development and applica-tion of a new method for the in-situ measurement of sound absorption”, ISMA 31,Leuven, Belgium (2010).], for measurement of the effective area-averaged in situsound absorption coefficient is investigated. Based on a local plane wave assump-tion, this method can be applied to sound fields for which a model is not available.Investigations were carried out by means of finite element simulations for a typicalcase. The results show that the method is a promising method for determining theeffective area-averaged in situ sound absorption coefficient in complex sound fields.
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