The acoustical engineering community mourns Lewis S. Goodfriend

Last week we were saddened to hear about the passing of Lewis S. Goodfriend. A genuinely nice guy whose contributions to acoustical engineering will live on. See below from his obituary. Lew was a proud Marine, serving in the Korean War. After the war, in 1953, Lew founded LSG&A as

New white paper: One screw makes a difference.

Pliteq EchoOne users will find a new white paper this week entitles “One screw makes a difference”. We completed a laboratory study into the effect of short circuiting resilient channel in wood frame floor-ceiling assemblies.

New FloorScore® certificates available for GenieMat®

GenieMat® RST and GenieMat® FF are Indoor Air Quality Certified to SCS-EC10.3-2014 v4. The updated FloorScore® certificates are available on the product pages. Measured Concentration of Total Volatile Organic Compounds (TVOC): Less than/equal to 0.5 mg/m3 (in compliance with CDPH/EHLB Standard Method v1.2-2017).

Two degree of freedom white paper now on EchoOne

This week we posted a new white paper to EchoOne. It is a walk through of the basic physics of one and two degree of freedom vibration isolation systems. The purpose of the document is to illustrate some common pitfalls and provide example calculations.

Featured products added to EchoOne.

When certified users log in to EchoOne this week they will see a section for featured products. In addition to the massive database of test results, we are pleased to use EchoOne as a vehicle to share our inventions and innovations in the field of architectural acoustics and vibration control.

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