Norsonic nor140, Instructional Manual

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Contents
Calculating the Airborne sound insulation according to the Engineering method ....................... 139
Source room level .................................................................................................................... 139
Receiving room level .................................................................................................................140
Background noise .....................................................................................................................140
Reverberation time ....................................................................................................................141
Display of results .......................................................................................................................142
Spectrum adaptation terms .................................................................................................... 143
Alternative national standards.................................................................................................. 143
Store and recall .............................................................................................................................. 144
Averaging levels or level-differences ............................................................................................. 144
Corner measurement for small rooms ............................................................................................ 145
Equalizing the excitation level ........................................................................................................ 145
Impact sound insulation ..................................................................................................................146
Impact excitation .......................................................................................................................146
Measurement of sound level .....................................................................................................146
Reverberation time ....................................................................................................................146
Calculating the Survey result ...........................................................................................................146
Impact sound insulation according to the French national Standard .............................................147
Calculating the impact sound insulation according to the Engineering method ...........................148
Receiving Room Level ..............................................................................................................148
Background noise .....................................................................................................................149
Reverberation time ....................................................................................................................149
Display of results .......................................................................................................................149
Alternative national Standards ...................................................................................................... 150
Store and recall .............................................................................................................................. 150
Averaging levels from multiple tapping machine positions ........................................................... 150
Corner measurement for small rooms .............................................................................................151
Partly re-use of previous measurements .........................................................................................151
Facade insulation ............................................................................................................................151
General .....................................................................................................................................151
Terms and definitions ................................................................................................................151
Noise excitation .........................................................................................................................152
Measurement of sound level .................................................................................................... 153
Measurement of reverberation time ......................................................................................... 153
Calculating the result ............................................................................................................... 153