Norsonic nor140, Instructional Manual, Page: 150 / 220

132
Chapter 24
Building Acoustics
Building Acoustics
Introduction
When equipped with the required program options,
Nor140 is well suited for measurement of building
acoustics in the form of measuring reverberation time
and sound insulation. The Building Acoustic option is
option 11 in the instrument.
The Building Acoustic – Survey mode allows meas-
urement of building acoustic parameters according
to the International Standard ISO 10052 (2004-12):
Acoustics – Field measurement of airborne and impact
sound insulation. These measurements are made in
full octave bands and the results are reported for each
band as well as frequency-weighted values according
to ISO 717-1 and ISO 717-2.
The Building Acoustic – Engineering method mode
allows measurement of building acoustic parameters
according to the ISO 16283 series of International
Standards. Measurements are made in one-third oc-
tave bands and the results are reported for each band
as well as frequency-weighted values according to
ISO 717-1 and ISO 717-2.
Alternatively, the engineering mode tests may be
calculated in accordance with the British Standards
BS-ISO-140, or, the U.S. Standards ASTM E336 and
E1007.
Measurement of service equipment in buildings in
accordance with the survey method (ISO 10052) or
engineering method (ISO 16032) is also possible with
the version 4 firmware of the Nor140.
Additionally, there are possibilities for measurement
of the airborne and impact sound insulation in accord-
ance with the French regulation.
The mode is entered by pressing
MODE
and select
“ 4 BuildAc”
. The BA mode menu then appears. Press
1
or
2
for selecting the measurement of either airborne
or impact sound insulation according to the survey
method. Press
3
or
4
for selecting the measurement of
either airborne or impact sound insulation according to
the engineering method (see figure next page).
Press
5
or
6
for selecting the measurement of air-
borne or impact sound insulation according to the
French regulations.
Press
7
or
8
for selecting the measurement of ser-
vice equipment according to the survey or engineering
method..
You have the choice to start measurement
within the Building Acoustic mode or to
make level measurement in Normal mode
and reverberation time measurements in
Reverberation mode. Store the result and
retrieve them later in Building Acoustic mode for
calculating the final result.