Comparison between Manually Moving Microphone Technique and Standard Method in Field Measurements, Performed According to ISO 140 Part 4, 5 and 7

A large number of field measurements have been performed in a residential building, consisting of six dwellings. The airborne sound insulation of façades, floors and walls, and also the impact sound insulation of floors was measured. Each measurement has been repeated with different methods: the common interpretation of ISO 140, with fixed points of measurement; the manually moving microphone technique, also allowed according to ISO 140 and the survey method described in ISO 10052, with the sound level meter held by hand by the operator and moved along a defined path. According to ISO 10052, the operator can use the reverberation time resulting from measurements or estimated by tables given in the same Standard. Besides, ISO 10052 establish that measurements have to be made in octave band, but in this study it has even been tried to apply this method using 1/3 octave bands and with the reverberation time achieved from measurements, obtaining a 1/3 octave band spectrum for the parameters under analysis. All the results have been compared both as single number and as 1/3 octave band spectrum.