It is possible for efforts to reduce noise to actually make it worse if the frequency of the noise is miscalculated. I know just enough about it to make me dangerous. So taking that into account ....
I think cork would be a bad idea in an engine room but I don't have access ATM to information that would confirm that opinion. Anything used in the engine room should be able to withstand high heat and grease and oil without burning or disintegrating. If you use a reflective coating on the side next to the engine, the sound will reflect into the engine room and bounce around inside. Any chinks in the armor will be magnified by the sound reflection. (Norm is exactly right about how the sound will work) So adsorbing is better. The best surface to adsorb sound is one with many small holes for the sound to penetrate and get lost. For instance, unpainted concrete block adsorbs sound surprisingly well. Paint it and you lose that adsorptive power. The other option is to reduce the vibration by keeping hard objects from striking other hard objects. Sometimes this is done in saw mills by putting the engine or other vibrating machinery onto rubber or some kind of springy substance. Or to make the vibrating surface vibrate less by making the surface smaller - for instance by making it a mesh or grid instead of a solid sheet. >> All the sound insulation- a dual foam coated with fiber reinforced >> reflective mylar- totally disintegrated in my boat. I think the >> insulation was the standard type typically used in engine rooms. It >> turned to a black crumbly powder. Needless to say when I re-insulate >> I wont be buying that type. >> >> Does anyone have any other brand names that are proven to work? > >What was the brand name of the one mentioned above that failed?
_______________________________________________ Liveaboard mailing list [email protected] To adjust your membership settings over the web http://www.liveaboardnow.org/mailman/listinfo/liveaboard To subscribe send an email to [EMAIL PROTECTED] To unsubscribe send an email to [EMAIL PROTECTED] The archives are at http://www.liveaboardnow.org/pipermail/liveaboard/ To search the archives http://www.mail-archive.com/[email protected] The Mailman Users Guide can be found here http://www.gnu.org/software/mailman/mailman-member/index.html
