Sound and Vibration Interactive Application Tutorials, Product Demos, and Case Studies
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National Instruments sound and vibration tools have been used in a variety of applications including those detailed here.
Interactive Application Tutorials
Learn more about common sound and vibration applications and how to solve them with National Instruments tools.
- Spatial Acoustics and Reveberation Time - Learn how you can use NI sound and vibration software and hardware to perform acoustical analyses, such as calculating reverberation time and the effect of sound absorption on the sound quality in a space.
- Production Line Audio Amplifier Test - A National Instruments Dynamic Signal Acquisition (DSA) card is used along with the Sound and Vibration Toolkit (SVT) to characterize an audio amplifier. National Instruments TestStand is also employed to automate the testing using synchronized DSA devices and calculations of distortion and frequency response.
Loudspeaker Testing with high-order harmonic analysis - Loudspeaker assembly faults, such as a rubbing voice coil, bent frame, loose spider, etc., have traditionally been detected using experienced human listeners at the end of a production line. Previous attempts to develop production measurement systems for on-line testing typically analyze only low-order harmonics for the primary purpose of measuring total harmonic distortion (THD), and thus are not specifically designed to detect defective rub, buzz, and ticking sounds. This presentation describes a new method wherein the total energy of high-order harmonics groups, for example, 10th through the 20th or 31st through the 40th, are measured and analyzed.
Product Demos
These online product demonstrations are designed to be quick overviews of the main features and capabilities of NI Sound and Vibration hardware and software and the many applications for which they may be used. All demonstrations are using LabVIEW 7.1.
Octave Analysis with the LabVIEW Sound and Vibration Toolkit
(Duration: 5 minutes) Learn how the LabVIEW Sound and Vibration Toolkit can be used to perform ANSI and IEC compliant fractional octave analysis.
Amplifier Characterization using Swept Sine
(Duration: 4 minutes) Swept-sine is a powerful analysis technique to measure frequency response. With the LabVIEW Sound and Vibration Toolkit, you can easily generate a frequency swept stimulus signal and measure the output of the device under test. Unlike convential broadband frequency response measurements, swept-sine analysis adds the capability to measure frequency-dependent distortion and to account for device-specific settling requirements. In addition to audio test, swept-sine analysis is an excellent tool for many mechanical vibration testing applications.
Vibration Measurement and Analysis
(Duration: 4 minutes) See how you can acquire vibration test data with a National Instruments USB-9233, or USB-9234 data acquisition device and implement vibration analysis including RMS calculations, limit testing, and FFTs.
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National Instruments Sound and Vibration
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