Ear Plugs
- Thread starter Hoota Caroota
- Start date
Jim Craik
Lifetime Supporter
I wore them once, on my first drive, from Reno NV to the bay area, after that, although loud, the plugs were uncomfortable and the noise was not that bad.
After a few months, I put Dynamat, bubble insulation on the firewall and filled some voids with foam. This made a huge difference in noise and heat. But by far the best thing was the thick Lexan, firewall window, big improvement.
After a few months, I put Dynamat, bubble insulation on the firewall and filled some voids with foam. This made a huge difference in noise and heat. But by far the best thing was the thick Lexan, firewall window, big improvement.
I still have the upgraded glass bulkhead window with thicker rubber edge seals available (hint, hint....shameless self promotion!)
I have about twenty of these out in the field on SPF 40s and have had good reports back.
Robert S.
GT40s Supporter
Send me info or a link please. Thanks, Robert
Dave Hood
Lifetime Supporter
Dennis Olthoff installed thicker glass on the bulkhead window and that made a fair difference. The GT40 is quieter for the driver than a Cobra. Still more than 100 decibles when driving on the highway, however. Just depends on how quickly you want to lose your hearing. I wear earplugs for longer drives.
I don't wear ear plugs because of additional noise control materials in the car. One of the materials we manufacture is for noise control and absorption. I have downloaded an App called Sound Meter from Smart tools on my Droid. CAT uses the system in there equipment. I also have an NIST instrument here at the plant used for noise measurement in the environment, but haven't run a side by side comparison of the two. I feel the app may read a slightly higher reading than the NIST meter. If you want a baseline try the app out.
Speaking of sound meters, for those with iPods, there's a free app called db from Skypa. You can download it from iTunes, just do a search on decibel meter. You can record a sound session in your car for a base line, then compare the trend after you make changes.
I like to stay connected to my car and hear what's going on with the motor and any other noises (suspension) that might develop along the way. However, I have used the foam ear plugs on extended road trips in the Cobra (6 days for Cruise Colorado), when it's windy and we're on a fast stretch of open road. My hearing's already shot from being around jet or turbine aircraft for so many years. :shout:
