mirrior rattle

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=107549
Printed Date: May 14, 2024 at 12:44 AM

Topic: mirrior rattle

Posted By: 04nata
Subject: mirrior rattle
Date Posted: September 19, 2008 at 2:07 PM

50/50 chance of posting in the correct forum

My rear view mirror vibrates like a rabbitt with new batteries ;), my thought is to drill a small hole in the plastic case and fill it with the spray in expanding foam insulation, BUT, I wanted to see if anybody has tried this before and if it worked or ruined the mirror

Replies:

Posted By: haemphyst
Date Posted: September 19, 2008 at 2:22 PM

Even if you do that, it's still going to vibrate... The expanding foam doesn't have enough mass to effectively lower the resonant frequency. You need something FAR heavier... Like lead. Kidding, but NOT kidding about the spray-in not being heavy enough.

No matter WHAT you do to it, it's still going to vibe. It HAS to - it is attached to a vibrating panel; the roof or the windshield.

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Posted By: 04nata
Date Posted: September 19, 2008 at 2:26 PM

I think I did not explain good enough, I know it will vibrate, but it rattles (mirror within the case), so in that case do you think it would work or will the pressure crack the mirror?

ps: I used lead on the first one and it fell off,,,,,,,,,,,,,,,,,,,,lol....j/k