The ObserVIEW software generates octave bands with an 8th-order filter to meet IEC 61260-1 Class 1 filter specifications. It performs filter-based analysis and can apply A and C frequency weighting, linear and exponential averaging, and peak hold.
Download Demo All Software FeaturesThe Octave Analysis software allows for the objective evaluation of sound and vibration by grouping the frequencies of an acoustic signal into “bins,” often to reflect how humans perceive the frequency spectrum.
The software program filters the acoustic signal and measures the sound pressure levels at the output. Then, customers can apply averaging and weighting techniques in the frequency domain to correspond to their desired sound evaluation measurements.
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True octave analysis applies bandpass filters to the frequency range and averages each filter’s output to compute its power. ObserVIEW performs filter-based analysis as it produces more accurate results.
ObserVIEW can also use FFT data—which measures the frequency content linearly—and assign the energy to the proportional octave. This method is only recommended if the computer cannot handle the filtered option.
Enter any 1/N fraction that suits test objectives; ObserVIEW does not have a limit on fractional octave bands.
Note: There is a soft limit of 1/96 for computer performance, but customers can override the limit.
The audio frequency spectrum is an overlay that represents the range of human hearing. Bass frequencies range from 20 to 250Hz (purple), Mids from 250 to 4kHz (yellow), and Highs from 4k to 20kHz (pink).
Vibration Research’s data acquisition systems offer the functionality to acquire and analyze acoustic signals. All VR hardware includes a BNC input that supports a microphone and is capable of data acquisition.
If a testing lab is already using VR hardware for vibration testing, sound acquisition and analysis are an economical addition.
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