Petraskova V., Dolejsi J.

Abstract: The purpose of measurement is to determine the size of measured variable that characterises a certain specific property. Particular measurements are usually accompanied by a number of errors. The results of measurements are expressed by means of a suitable estimate of mean value and with corresponding uncertainty related to the errors of measurements. The presentation deals with the bases of the uncertainties in connection with measurement of acoustic performance, and deals with a statistical analysis of an experiment of identity. The second part of the presentation includes the basic information on interlaboratory comparisons, organized by Studio D-akustika s.r.o. in the Czech Republic. In the comparisons there have taken part tested laboratories from the Czech Republic, Austria, Slovakia, Germany, Switzerland, Poland and Finland. Comparisons are in the area of acoustics measuring as acoustics pressure and determination of acoustics power of sources.