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Nor850 Reporting software (850/RA): Room acoustics according to ISO 3382
The room acoustics module 850/RA offers the complete evaluation according to ISO 3382-2 (ordinary rooms) and ISO 3382-3 (open-plan offices).
The reverberation time T for the evaluation according to ISO 3382-2 can be measured via the impulse or noise excitation, either first in the sound level meter or directly via the Nor850 software – with wireless control of the Nor145 sound level meter and power amplifier via WLAN.
In addition to the evaluation according to ISO 3382-2, the Module also enables the measurement of the room impulse response using the SweptSine excitation followed by calculation of the reverberation time and speech intelligibility, as well as the complete measurement routine and evaluation for open-plan offices according to ISO 3382- 3, including generating the test report with all single values (D2,S; Lp,A,S,4m; rD, rC, Lp,A,B).
Completely wireless – no more hassle with cables!
Measurement - evaluation - post-processing
The Nor850 offers evaluation options according to common national and international room acoustic standards. Measurements can be extensively documented and evaluated. If you only discover afterwards that one of the individual measurements contains a disturbance, you can exclude it from the averaging. The results are then automatically updated. If the algorithm was unable to correctly set the compensation line during reverberation measurements due to background noise (which is displayed), this can be corrected manually. The software checks all standard criteria and gives you information about where criteria may not have been met.
Standards included:
ISO 3382-2: Acoustics — Measurement of room acoustic parameters — Part 2: Reverberation time in ordinary rooms
ISO 3382-3: Acoustics – Measurement of room acoustics parameters – Part 3: Open-plan offices
Measured variables:
- Distance to the sound source (airline), r
- Unweighted SPL of broadband noise, Lp,oss
- Unweighted SPL of background noise, Lp,B
- Speech intelligibility STI
Automatically calculated single values (for assessment):
- Spatial decay rate of the A-weighted SPL of speech, D2,S, in dB
- A-weighted SPL of speech at 4.0 m distance, Lp,A,S,4m, in dB
- Deflection distance, rD, in m
- Comfort distance, rC, in m
- Mean and standard deviation of the A-weighted SPL of the background noise across all measurement positions in a zone, Lp,A,B, in dB
The advantages of the system:
- Complete communication via WiFi
- Between the laptop and the Nor145 sound level meter
- Between laptop and Nor282 power amplifier
- So completely wireless
- Impulse response is transmitted digitally (WAV) from the Nor145 via WLAN
- No sound card required and therefore significantly less parameterization
- Complete evaluation according to ISO 3382-3 in the software
Noise sources
Nor282 Power amplifier
Sound level meters
Nor150 Sound and vibration analyser
Sound level meters
Nor140 Sound analyser
Noise sources
Nor280 Power amplifier
