Quote:
Originally Posted by vwli
After doing sound deadening on my Fit (see Sound Deadening Step #1), reako was suggesting to compare DB reading against the stock Fit. Finally borrow a DB meter. Here is my testing condition and measurement:
- Sound deadened Fit Sports M/T with stock Bridgestone Turanza EL470 at 33 psi
- DB meter with passenger holding on the laps with mic facing forward.
- Wet road with light drizzle (typical Seattle weather)
- DB meter from Radio Shack: Digital-Display Sound-Level Meter - RadioShack.com
- DB meter at A weighting (500-to-10,000 Hz)
Test Result #1
- 60 mph on freeway to work on average road surface; 71 to 75 db; most of the time around 73 db
- 40 mph on local road; around 64 db
Test Result #2 (Compare with 2004 Passat)
- 60 mph on a smoother surface freeway
- sound deadened Fit: 68 to 69 db
- stock Passat: 65 to 66 db
- loss by 3 db
If any of you have a db meter and would like to compare with my sound deadened Fit, please post reading. |
a lot of factors go into db meter...diff placement of the meter will cause 1 db off or so
even if it just an inch different
and the way the sunvisors are placed can cause a difference too
i know cause i looked into spl competition and read up on tricks to get a higher db
and diff db meters are not always accurate..so even if someone has a db meter...results wont be accurate...BUT it stil always good to look at
=)