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Issue #118, September 2017
Fall has officially arrived, though the temperatures in Ohio would make us think summer is still in session! Whether this newsletter finds you at the beginning of the academic year or perhaps nearing the end of your fiscal year, we're here to deliver useful technical information right to your inbox. Learn more below about sound power measurements and ISO 17025 compliance. Don't forget to check out the archive of materials we have for you online from the past 117 issues of Dynamic Sensors & Calibration Tips, too!
Sound Power Basics


Have you ever wondered what it takes to make sound power measurements? PCB Acoustics Expert, Dr. Chad Walber, details acoustics basics and terminology before explaining topics such as particle motion vs. waveform propagation, sound fields, and octave band analysis. Dr. Walber has a straightforward approach to a complex topic...


Click here to view the video
Tip of the Month

Impacts from instrumented hammers, particularly when using the hard steel tips, can cause extremely high acceleration levels of impulse response. Therefore, whenever performing impact hammer calibrations, make certain that the reference accelerometer data does not saturate, truncating the measuring impulse function and significantly altering the calibration results.

Blast from the Past:
Under Control? ISO 17025 Compliance

This month we continue to examine the most common deficiencies in ISO 17025 compliance. Cutting right to the chase, this month's deficiency is the 2nd most common -  Infractions in ISO 17025 Section 5.5, Equipment. The nature of calibration requires using the proper equipment with known performance, traceability and reliable operation. While this is clearly core to the accurate operation of calibration, ironically, the compliance violations in this area are very common.


Click to read the full article 
Thanks for joining us for another issue of Dynamic Sensors & Calibration Tips.
As always, please speak up and let us know what you like. We appreciate all feedback: positive, critical, or otherwise. Take care!

Sincerely,
Aaron Goosman -  Mike Dillon - Patrick Timmons - Shannon Henize

Calibration Team
The Modal Shop
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