Product data

6
Other Tasks
Façade Sound Insulation
Façade sound insulation is a variant of airborne sound insulation, with its own standards. The “source room”
is the space outside the facade, and the sound source may be road traffic or a loudspeaker representing
outdoor noise. When using traffic noise, the indoor and outdoor sound levels must be measured
simultaneously, requiring 2-channel measurements (Type 2270 only). The outdoor microphone positions are
flush with the facade, or 2 m in front of it. Calculations are similar to those of the airborne sound insulation,
but take the pressure increase at the microphone positions into account.
Impact Sound Insulation
Impact sound is typically caused by footsteps, and to measure impact sound insulation a standardised
impact sound source (tapping machine) is placed in the source room. The receiving room levels are
measured as for airborne sound insulation, with several positions of the tapping machine. Calculations are
like those for airborne sound insulation, except the results represent absolute (not relative) levels.
Wireless Systems
Fig. 10
Optional wireless
systems are avail-
able to control the
sound source for
airborne and impact
sound insulation
measurements
In the field, using a wireless system can speed up
measurements by reducing the number of cables and make it
easier for you to move between microphone positions and
rooms.
Review, Analysis and Report Generation using PULSE Reflex Building Acoustics Type 8780
PULSE Reflex Building Acoustics Type 8780 is the software package for post-processing and reporting of
building acoustics measurements made with Type 2250/2270. Measured data can be directly imported from
Type 2250/2270 into Type 8780 for viewing, further analysis/re-analysis and reporting of data. In addition to
being a post-processing tool, Type 8780 allows you to control Type 2250/2270 software upgrades as well as
licensing of the Type 2250/2270 applications.
The application incorporates the following features:
• ‘Fast-track’ report generation using the PULSE Reflex workflow concept and a library of user-defined
report templates
• Versatile handling of measurement data in combining and comparing assessments
• Interactive measurement integrity checks ensuring the best quality of calculation possible
• Available in several languages, Type 8780 can generate reports complying with national and international
legislation
• Edit measurement data in the interactive display to instantly reveal which factors contribute most to your
sound insulation results
Once your measurements are imported, Type 8780 will display data numerically and graphically, in one clear
and concise environment, see Fig. 11.