Academic Company Events NI Developer Zone Support Solutions Products & Services Contact NI MyNI

Document Type: Tutorial
NI Supported: Yes
Publish Date: Oct 23, 2006

Subscribe

Add to Del.icio.us

DIGG this!


Feedback


Yes No

Related Links - Developer Zone

Loudspeaker Testing

1 ratings | 4.00 out of 5
Print
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.

This was originally presented by Dan Foley, Vice President, Listen Inc. at the NI Sound and Vibration Summit at NIWeek 2005.


Related Links:
NI Sound and Vibration Portal
Sound and Vibration Interactive Application Tutorials

Downloads

hghordharmsiganaldspkr.ppt

1 ratings | 4.00 out of 5
Print

Reader Comments | Submit a comment »

 

Legal
This tutorial (this "tutorial") was developed by National Instruments ("NI"). Although technical support of this tutorial may be made available by National Instruments, the content in this tutorial may not be completely tested and verified, and NI does not guarantee its quality in any way or that NI will continue to support this content with each new revision of related products and drivers. THIS TUTORIAL IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND AND SUBJECT TO CERTAIN RESTRICTIONS AS MORE SPECIFICALLY SET FORTH IN NI.COM'S TERMS OF USE (http://ni.com/legal/termsofuse/unitedstates/us/).