by ABD Engineering and Design | Noise and Vibration
On a recent trip to India, I discovered a cute clothing sizing term called "free size" which is equivalent to "one size fits all". Free size clothing must be a manufacturer's delight since production and distribution are greatly simplified. Adjustments to the size of...
by ABD Engineering and Design | Noise and Vibration
It is common belief that a series of elbows near an air handling unit (AHU) can accomplish the same insertion loss as a manufactured duct sound attenuator. It's true that elbows are less expensive than sound attenuators, but what acoustical performance is really...
by ABD Engineering and Design | Acoustics
As long as you haven't been living in a cave this past year, you've probably noticed that America's new favorite color is green. Even the "big, scary corporations," like Walmart and McDonalds, have re-worked their ad campaigns to reflect a more-green, environmentally...
by ABD Engineering and Design | Acoustics
In a former life I worked for a very large engineering company with over 1,000 engineers working in an open plan office, everyone working on one floor. We lovingly referred to our floor as the "cube farm". One day I arrived at the office just as the lunch crowd was...
