A while back I made a post about The Soundcoat Company who has been providing specialized noise control solutions for aerospace, medical, and industrial applications since 1963.
Steven Klein at Sounds of Silence had told me about how effective their GPDS damping sheets were when he applied the .070 GPDS vibration damping material to strategic locations within the chassis and external power supply of the New Valve Order SPA II phono equalizer. (In the photo below you can see the New Valve Order SPA II phono equalizer sitting on a large piece of GPDS damping sheet.)
Here's what it looks like when it is applied inside the SPA II (below).
I've had a number of illuminating conversations with Joseph Tran, an Acoustical Engineer with The Soundcoat Company, about how I might apply Soundcoat products to the Duelund-WRSE Project external crossovers.
During those conversations I found out that Joseph is an all around cool guy: a music lover like all of us (he's particularly fond of headphone listening), a Leica camera enthusiast that enjoys taking photos with his Leica film camera, and he's a cycling enthusiast who enjoys cycling outings with his family! That’s cool!
After having some fun talking about music, Leica cameras, and cycling, we got back on topic and Joe told me about some other very interesting Soundcoat products in addition to the GPDS damping sheets (flat black sheet below) that worked so well on the New Valve Order SPA-II phono equalizer: the Dyad 601 (0.020" thick) damper, a clear viscoelastic polymer (with the white backing in the photo below), and Soundfoam CSI (1/8" thick) isolator, a black closed-cell foam (the black rolled-up material in the photo below).
Joe told me that the Dyad viscoelastic material (clear) was used in a constrained-layer damping method to damp the deck of ships like aircraft carriers. Dyad was also used to damp the Mariner Spacecraft boom mounted video cameras from 1.28 Hz and 0.16 Hz vibrations that were blurring video signals.
When I hold the Dyad 601 in my hand it is soft, flexible, and kind of tacky feeling. It's easy to see how it would minimize the transmission of vibration.
If you look at the screenshot below from some older literature you'll notice that the Dyad 601 provides 7dB of noise reduction.
Joe said, "The black isolator is used anywhere isolation is required, preventing vibration from passing from one surface to another. I'll try to find some documented uses for this material after the break also."
The Soundfoam (below) is a soft, flexible, material that is easy to scrunch up in your hand.
Ok, that's it for now. As soon as I figure out how I'm going to apply these to the Duelund-WRSE Project external crossovers I'll let you know how it works.
More to come!
