Page 51 - Jul2009
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 Instrumentation
 Dick Stern
Applied Research Laboratory, The Pennsylvania State University PO Box 30, State College, Pennsylvania 16804
Acoustics Today welcomes contributions for “Instrumentation.” There is no charge for this service. Submissions of about 250 words that may be edited in MSWord or plain text files should be e-mailed to <acousticstoday@aip.org>. Graphics must be at least 300 dpi. Please send the text and graphics in separate files.
   Recently, an array of PCB® Piezotronics Model T130D21 microphones was used to evaluate the noise sources of a house- hold appliance at different frequencies. An articulating confor- mal array and software system not only reduced the setup time for near-field measurements but ultimately identified the true
noise sources on the product, both structural and airborne. PCB® Model T130D21 array microphones, with their excellent phase characteristics, are small, cost effective and are ideal for performing the same type of testing on a variety of products. Contact: Jennifer Beal (prospects@pcb.com).
   PCB Piezotronics, Inc., introduces a new series of MEMS shock accelerometers. PCB® Series 3991/3501 MEMS shock accelerometers represent state-of-the-art industry technology for miniature, high-amplitude, DC response acceleration sen- sors, capable of measuring long duration transient motion, as well as responding to and surviving extremely fast rise times typical of high-g shock events. The air-damped acceleration
sensing element, that is micro-machined from silicon meas- ures just 2.5 x 1.7 x 0.9 mm. The sensor incorporates a seismic mass, protective over range stops, and a full-active, piezore- sistive Wheatstone bridge. The slight air-damping reduces the resonant amplification and increases measurement accuracy. The over range stops give the sensor exceptional survivability. Contact Jennifer Beal (prospects@pcb.com).
 Editor’s Note—The items printed in “Instrumentation” are reported for informational purposes only and are not necessar- ily endorsements by the Editor, Acoustics Today, or the Acoustical Society of America.
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