TY - CHAP A1 - Tröbs, H.-M. A1 - Schanda, Ulrich A1 - Völtl, R. T1 - Measurement of the radiation efficiency of suspended ceilings at low frequencies using swept sine excitation and high-frequency resolution T2 - Internoise 2013 N2 - It is common for timber ceiling constructions to include a suspended ceilings made of plasterboard. In order to minimize the radiation from impact excitation, especially in the low frequency range below 100 Hz, a detailed analysis of the vibration behaviour was necessary. An experimental modal analysis was carried out and the radiated sound power from the suspended ceiling was measured using a sweep sine excitation by a shaker connected to the top layer of the timber floor construction. Since the experimental modal analysis was conducted using a high frequency resolution and with a non-stationary sound field, it was necessary to check the validity of the intensity measurements by comparing it with 1/3-octave band measurements. The results show very good agreement. By this means the radiation efficiency can be measured simultaneously with an experimental modal analysis of a structure. KW - Schallmesstechnik KW - Holzbau Y1 - 2013 ER - TY - CHAP A1 - Schanda, Ulrich A1 - Tröbs, H.-M. A1 - Völtl, R. A1 - Becker, P. T1 - Semi-empirical model of the impact force of a walking person in the time domain and generated impact sound spectra T2 - Internoise 2013 KW - Schallmesstechnik KW - Holzbau Y1 - 2018 ER -