|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
|
|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
In Reply to: Not quite true… posted by David Aiken on October 6, 2005 at 16:56:54:
Coupling devices like cones don't have a mechanism or process for shedding vibrational energy so they pass whatever vibration gets into the cone. However the vibration entering the cone is dependent on things like contact area and that introduces an element of frequency dependence. My feeling is that the smaller the contact area, the more the lower frequencies have difficulty entering the cone.Cones ought to be near perfect couplers as long as the vibration forces don't overcome static friction, and once they do the cone will float on the surface. I don't know whether low frequency vibrations would be likely to generate larger forces, but it seems plausible.
It's also worth noting that isolation isn't necessarily a good thing and coupling isn't necessarily a bad thing. Shannon Dickson makes the point in his excellent "Bad Vibes" article (see Paul Tobin's post for a link) that perfect coupling would actually give the best results we could achieve - at that point the component and the supporting shelf or rack would actually be at rest in relation to each other.Theoretically, perfect coupling should give the best results if the primary source of vibration is in the component itself (e.g. a vibrating CD transport or a humming transformer). Coupling then provides a path for vibrational energy to drain out of the component into a suitable sink. Coupling the component to something massive can also lower its resonant frequencies. Conversely, isolation should give the best results when the primary source of vibration is external to the component.
YMMV of course. We know how component and system dependent these things are. I like the idea of using a stethoscope as part of the tuning process, but I've yet to try that.
Dave
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Re: Not quite true… - Dave Kingsland 18:34:50 10/06/05 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
