It's a single layer

Posted by mr.bear (A) on April 30, 2016 at 13:40:47

In Reply to: it looks liek 2 layers posted by Penguin on April 29, 2016 at 20:28:22:

The lower piece is just an isolated little closure panel, so you don't look at the damping feet underneath the upper plate. It is not connected to the plate.

The plan is to add a constrained-layer damper of an aluminum plate bonded to the underside of the stone through a visco-elastic film. I'm waiting on the aluminum plate from a friend.

If anybody's interested, you can alculate the plate thickness and stuff from formulas in the Navy scientific papers. The Navy use this approach to quiet the walls of submarines. Vibration of the stone plate is dissipated by the viscoelastic, but it needs to be sandwiched with a constraining layer having around 1/10 the elastic stiffness of the plate you want to damp.

The plate now sits on specific anti-vibration feet similar to the Mapleshade Isoblocks that I purchased from Wagner Motion Control. If they don't work well there's cool alternatives from the link below. Just FYI.

Vibration Conrol Pads and Tapes (Open in New Window)

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Follow Ups Full Thread

Topic - Stone Isolation Base Installed - mr.bear 15:44:24 04/29/16 (21)

RE: Stone Isolation Base Installed - fin1bxn@msn.com 13:01:28 05/02/16 (0)

RE: Listening today - mr.bear 16:04:19 05/01/16 (2)

Thanks for the candor. Its refreshing to read a post like that one. nt - Rick W 20:44:21 05/01/16 (0)

RE: Listening today - Uncle Mike 16:40:55 05/01/16 (0)

I suspect that stone is mostly good for making things heavier - genungo 13:52:53 04/30/16 (1)

RE: I suspect that stone is mostly good for making things heavier - mnawaz3@aol.com 01:22:30 05/04/16 (0)

it looks liek 2 layers - Penguin 20:28:22 04/29/16 (12)

It's a single layer - mr.bear 13:40:47 04/30/16 (5)

I'm real confused. - Tre' 20:53:58 04/30/16 (4)

RE: I'm real confused. - mr.bear 15:54:10 05/01/16 (3)

OK. Got it. Thank you. I have 2 pieces of marble... - Tre' 17:52:52 05/01/16 (2)

Nice! - mr.bear 12:46:39 05/02/16 (1)

RE: Nice! - Tre' 15:22:56 05/02/16 (0)

RE: it looks liek 2 layers - Mick Wolfe 10:10:23 04/30/16 (0)

RE: it looks liek 2 layers - Cpwill 09:07:13 04/30/16 (0)

I have a technics Sp10 Mk 2 in an obsidian base - Penguin 21:11:22 04/29/16 (0)

RE: it looks liek 2 layers - raya 21:07:23 04/29/16 (2)

RE: it looks liek 2 layers - mr.bear 15:12:31 04/30/16 (0)

response is above (nt) - Penguin 21:12:38 04/29/16 (0)

All your base look very nice. - MannyE 18:32:14 04/29/16 (0)

Dunno anything about that tt, but it and the base look very nice. nt - Rick W 17:08:59 04/29/16 (0)

Follow Ups

It's a single layer - mr.bear 13:40:47 04/30/16 (5)

I'm real confused. - Tre' 20:53:58 04/30/16 (4)

RE: I'm real confused. - mr.bear 15:54:10 05/01/16 (3)

OK. Got it. Thank you. I have 2 pieces of marble... - Tre' 17:52:52 05/01/16 (2)

Nice! - mr.bear 12:46:39 05/02/16 (1)

RE: Nice! - Tre' 15:22:56 05/02/16 (0)

It's a single layer

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