The next generation of noiseLAB from CTXI adds vibration analysis and psychoacoustic metrics for noiseLAB with no change in pricing.
noiseLAB Pro provides three core elements:
- Noise Analysis
- Vibration Analysis
- Human Impact
For classical noise analysis, 1/1 to 1/24 octave analysis is provided along with FFT spectrum analysis with resolution from 1 Hz to 100 Hz. Also included is Sound Level (Z, A, B, C weighting) with choice of integration time constant, Impulse, Peak, and statistical analysis, Leq and LE. In addition, noiseLAB also provides low frequency A weighting and Infrasound G weighting.
Vibration analysis is based on accelerometer signals, which with integration provides velocity and displacement in a variety of units, displayed with linear or logarithmic X and Y scales. Both Peak, Peak to Peak, and RMS (with selectable time constant) is available for vibration analysis.
The human impact of noise and vibration is a major new addition to noiseLAB. In addition to the ISO 1996 Tone Analysis, the classic sound quality metrics of harshness, roughness, loudness (stationary and time-varying), sharpness and fluctuation strength are also provided.
As a leader in psychoacoustic research, the tone analysis method (ISO 1996 Annex 3) was developed by DELTA, and is now supplemented by two new experimental metrics for wind turbines: the Pedersen method for low frequencies and the LeGarth method for swish analysis By making these widely available the noise industry can contribute to test and evaluation of these techniques, and help drive suggestions for possible improvements more rapid implementation.
In addition, for impulsive sound, noiseLAB supports the Nordic ACOU 112 standard.
noiseLAB provides powerful, Class 1 Recording and Analysis of noise and vibration signals and their human impact. The same analysis can also be made on imported .wav files. The relevant standards conformance is shown here.
Additional Functions in noiseLAB:
Non-destructive editing of recorded signals ensures that only relevant signals are analyzed. For a given recording the user can create multiple clips of areas of interest in the signal, and these can either be included or excluded from the analysis.
Time Slice analysis, breaks the signal into shorter blocks of user-defined length. Thus the time varying aspects of the signals can readily be seen, and single-click export of multiple time slice graphs in JPG format is fully automated.
All analysis data can be exported to Excel which along with exported graphs makes report generation using standard Office software tools easy. FFT spectra from external instruments can also be read by noiseLAB for subsequent Tone Analysis. noiseLAB can analyze imported .wav files and signals from a broad range of DSA digitizers from National Instruments. Time domain signals are stored in the .tdms format which is interoperable with software such as Excel, MatLab and LabVIEW.
Summary of main functions:
|Number of Chs.||
|Time Slice||10 sec||
Fast, Slow, Leq, Peak, Impulse, Ln
|Wind Turbine Metrics||Swoosh+Low Frequency|
|File Formats||tdms, wav, tab delimited, jpg.||–||
All specifications subject to change without notice.
noiseLAB is available from DELTA and its Distributors.
Link to current shipping noiseLAB Version 3.0