CORRELATION OF ACOUSTIC MEASUREMENTS AND VIBRATION ANALYSIS RESULTS.
CORRELATION OF ACOUSTIC MEASUREMENTS AND VIBRATION ANALYSIS RESULTS.
(OP)
Hi
Does anyone know of a good source of information correlating acoustic measurements (sound power/intensity) with vibration analysis of small (1 or 2 cubic meters) products during production?
Thanks
Does anyone know of a good source of information correlating acoustic measurements (sound power/intensity) with vibration analysis of small (1 or 2 cubic meters) products during production?
Thanks





RE: CORRELATION OF ACOUSTIC MEASUREMENTS AND VIBRATION ANALYSIS RESULTS.
RE: CORRELATION OF ACOUSTIC MEASUREMENTS AND VIBRATION ANALYSIS RESULTS.
Most of the available research is for large panels and cylinders.
A scholarly reference is:
L. Cremer and M. Heckl, Structure-Borne Sound, Springer-Verlag, New York, 1988.
The following reference has a section that gives a practical calculation method:
D. Steinberg, Vibration Analysis for Electronic Equipment, Wiley-Interscience, New York, 1988.
Also, refer to the Franken method, as shown, for example, in:
NASA-HDBK-7005 Dynamic Environmental Criteria
The quick answer, however, is that you will probably need to take your own measurements.
Tom Irvine
http://www.vibrationdata.com
RE: CORRELATION OF ACOUSTIC MEASUREMENTS AND VIBRATION ANALYSIS RESULTS.
I can't find the Franken method in the web version of the NASA handbook. Can anybody give another reference to the method.
Thanks
RE: CORRELATION OF ACOUSTIC MEASUREMENTS AND VIBRATION ANALYSIS RESULTS.
Tom Irvine
http://www.vibrationdata.com
RE: CORRELATION OF ACOUSTIC MEASUREMENTS AND VIBRATION ANALYSIS RESULTS.
RE: CORRELATION OF ACOUSTIC MEASUREMENTS AND VIBRATION ANALYSIS RESULTS.
RE: CORRELATION OF ACOUSTIC MEASUREMENTS AND VIBRATION ANALYSIS RESULTS.
Unfortunately I still can't work out the Franken Method. The reason for asking the original question is that people within our organisation are keen to reduce the amount of acoustic testing of products in production and rely purely on vibration analysis as it is easier to do. I was trying to see if we could totaly replace acoustic testing with vibration analysis - it seems we can't because the two are not necessarily related.
RE: CORRELATION OF ACOUSTIC MEASUREMENTS AND VIBRATION ANALYSIS RESULTS.
But that sentence has many weasel words in.
The topic of predicting noise from vibration for engines is covered well in an SAE or IMechE paper from the 80s, one of the authors was Yorke, working at Perkins.
Typically you need to classify each radiating surface of the machine as one of several types, then analyse it to get a radiation efficiency, vs frequency, and then measure the average panel vibration spectrum, using say 5 accelerometers.
My friends at www.prosig.co.uk once developed a system to do just that.
Cheers
Greg Locock
RE: CORRELATION OF ACOUSTIC MEASUREMENTS AND VIBRATION ANALYSIS RESULTS.
I have just found a reference to ISO/TR 7849 in ISO 9614 (determination of sound power levels using sound intensity). The title of the ISO/TR document suggests that it is possible to determine sound power from vibration measurements.
Does anybody have any practical experience with the ISO/TR 7849 document or the procedures described therein?