Third-Octave Analysis (DAQmx, Simulated)
This VI continuously acquires data from the specified channel. The data is scaled to engineering units, the third-octave spectrum is computed, and the octave spectrum is weighted according to the specified weighting.
The third-octave spectrum is computed in accordance with the ANSI S1.11-2004 and the IEC 1260:1995 standards. This VI is a shipping example VI included with the NI Sound and Vibration Measurement Suite and NI Sound and Vibration Toolkit.
This Virtual Instrument is designed to work with data acquisition hardware from National Instruments. To find compatible hardware for this application, visit ni.com/soundandvibration.
This software is written in LabVIEW, a graphical programming language designed for scientists and engineers. For more information about LabVIEW, visit ni.com/labview.
Sound and Vibration Developers Library
The NI Sound and Vibration Developers Library is your one-stop online resource for learning about and downloading code for acoustic analysis, machine daignostics and audio test functions. On this page you will find links to detailed tutorials, application notes, example programs, and analysis function descriptions.
More information on National Instruments signal processing can be found at the Signal Processing Resource Center.
This is a picture of the VI's front panel. To view the block diagram and additional documentation, download the attached file.
This example requires LabVIEW and the Sound and Vibration Measurement Suite. If you do not have access to these, you can always try them out online at the LabVIEW Online Evaluation.
Application Software: LabVIEW Full Development System 8.2
Toolkits and Add-Ons: LabVIEW Sound and Vibration Toolkit 5.0
Hardware Group: Dynamic Signal Analyzers (DSA)
Driver: NI-DAQmx 8.3
Reader Comments | Submit a comment »
does his work below 10 HZ?
Under 10 HZ is useful for whole body vibrations, as opposed to hand/arm which is higher. Last time I tried to use vibration package, the 1/3 octave analysis would not work in this frequency range.
- Dec 16, 2009