Campbell Associates Ltd
Sonitus House,
5b Chelmsford Road Industrial Estate
Great Dunmow, Essex CM6 1HD
T . +44 (01) 1371 871030
F. +44 (01) 1371 879106
Registered Office: 12 Alma Square, Scarborough, North Yorks YO11 1JU Registered Company No 3700715
www.campbell-associates.co.uk
USER SET UP GUIDE FOR BUILDING ACOUSTICS
SET UP NOR 140 FOR AIRBORNE TESTING
1. Setting up Nor 140
1.1 Measurment Standard
The BS ISO 140-4 is superseded by BS EN ISO 16283-1:2014. The BS ISO 140-4 is no longer current
but is cited in the Building Regulations for England and Wales, Northern Ireland and Scotland. The
Irish regs (SITRI) use ISO 16238 universally.
Applies to sound insulation within a pair of rooms. Determines the steady state 1/3 octave band
filtered white noise level difference and the receiving room equivalent absorption area from which
the standardised level difference is derived. The results can be used to determine whether building
elements have met acoustic specifications, e.g. Building Regulations.
The Norsonic building acoustic kit meets both the BS ISO 140-4 and BS EN 16283-1:2014 standard.
1.2 Nor 140 field calibration
The field calibration of the Nor 140 for building acoustic testing takes place in the normal mode and
will occur as a standard calibration
via the orange ‘CAL’ key
.
Note: Used calibrator - Nor 1251 Class 1
calibrator
–
114 db at 1kH
1.3 Set up Nor 140 for Airborne Testing
To start a measurement for airborne testing you need to select the building acoustic mode
–
press
#7 on the key pad to choose your mode. You will find Building acoustic mode under #4
–
see fig 1.1.
Select airborne testing via #3
–
see fig 1.2
Fig 1.1 #7 Mode Options
Fig 1.2 #3 Airborne Testing
