N2 - A theoretical method has been presented to describe sound decay in building enclosures and to simulate the room impulse response (RIR) employed for prediction of the indoor reverberation characteristics. The method was based on a solution of wave equation having the form of a series whose time-decaying components represent responses of acoustic modes to an impulse sound source. For small sound absorption on room walls this solution was found by means of the method of variation of parameters. A decay function was computed via the time-reverse integration of the squared RIR. Computer simulations carried out for a rectangular enclosure have proved that the RIR function reproduces the structure of a sound field in the initial stage of sound decay suffciently well. They have also shown that band-limitedness of the RIR has evident influence on the shape of the decay function and predicted decay times. L1 - http://journals.pan.pl/Content/101324/PDF-MASTER/aoa-2016-0003.pdf L2 - http://journals.pan.pl/Content/101324 PY - 2016 IS - No 1 EP - 41 DO - 10.1515/aoa-2016-0003 KW - room acoustics KW - indoor reverberation KW - room impulse response KW - modal expansion method KW - decay times A1 - Meissner, Mirosław PB - Polish Academy of Sciences, Institute of Fundamental Technological Research, Committee on Acoustics VL - vol. 41 DA - 2016 T1 - Prediction of Reverberant Properties of Enclosuresvia a Method Employing a Modal Representationof the Room Impulse Response SP - 27 UR - http://journals.pan.pl/dlibra/publication/edition/101324 T2 - Archives of Acoustics