Good Vibrations (Part 2) - Dealing With Unwanted Vibrations
September 11 2019, 09:15
Following a first R&D article, where Norman Varney discusses the basic principles of unwanted vibrations in audio playback environments, in this second part he writes about what his research found to be effective ways to counteract those effects. The article details the evaluation process and extensive measurements that lead to the creation of various products that AV RoomService provides when helping clients with their acoustic problems. This article was originally published in audioXpress, September 2019.
Following a first R&D article, where Norman Varney discusses the basic principles of unwanted vibrations in audio playback environments, in the second part he writes about what his research found to be effective ways to counteract those effects. The article details the evaluation process and extensive measurements that lead to the creation of various products that AV RoomService provides when helping clients with their acoustic problems.
RoomDamp2 is applied to the back of the second layer of sheathing to act as a constrained-layer damping compound.
There are good vibrations, and there are bad vibrations. Everyone knows that, right? It turns out, not everybody does. At least not to the extent they should.
When we play back audio, we only want to hear sound waves created from the electro-mechanical vibrations produced by the loudspeaker. They are the result and intention of the artists. They are the original signals. These are good vibrations. But what happens when there are bad vibrations?
In the noise control industry, the best place to start is usually at the source of the noise. In our example, we start with the loudspeaker. The biggest contributors to unwanted noise and vibration are the walls, the ceiling, and the floor. I have been serious about accurate music playback since I was a kid. I have been in the business for decades. I am someone whose hobby is also his living. It is because of my love of music. My company, AV RoomService, Ltd. offers acoustic design and testing services, as well as several original acoustic products, two of which target the problems discussed in this article.
Equipment Vibration Protectors (EVPs) are available in 2” and 4” squares by approximately 1” tall, with felt and rubber finishes, and in three standard densities to handle equipment loads from 3 lbs to more than 300 lbs.
