P. A. Schilke
Well-Known Member
- First Name
- Phil
- Joined
- Apr 3, 2019
- Threads
- 142
- Messages
- 7,016
- Reaction score
- 36,214
- Location
- GV Arizona
- Vehicle(s)
- 2019 Ranger FX4 Lariat 4x4, 2020 Lincoln Nautilus, 2005 Alfa Motorhome
- Occupation
- Engineer Retired
- Vehicle Showcase
- 1
HI JIm,Hi Phil,
I would be curious to hear your recommendations for soundproofing. As I have found the joy of soundproofing is not to be underestimated. Yes, I have a large downpipe, a Borla catback exhaust, a larger turbo, and my truck can be kind of loud. Some people don't understand why but I did sound proof my truck. Oh man... it is glorious. It is really quiet when driving easy and on the highway, even with Goodyear DuraTrac tires. However, when I choose to hear the growl, I just drop the transmission to Sport and hit the gas.
I measured the sound with my Apple Watch and my best estimate, as I don't assume I am 100% accurate in making equal measurement within equal experiments, is at least 15 dB. That is a lot! Plus, when I close the doors the truck feels way more solid.
When I was done with my truck I continued on my daughter's 2018 Ford Escape Titanium. The interior of her car feels nicer than the last 5 Series BMW I had and in the realm of my 7 Series.
I used a butyl and foil product as well as automotive Thinsulate from 3M. I also added a bit of thing foam to to underside of the roof skin and to the doors to lessen the thermal load for the HVAC systems. I am curious if you have any other suggestions for soundproofing.
Have a great weekend!
Jim
Wow! You have done a fantastic job of quieting your Cab. 3 dBa is roughly a 100% reduction and at 15 you have done exceptionally well. Applications you have addressed are potential noise paths. Since I do not have access to the NVH mapping of the Ranger, I can only estimate noise sources. The forward dash panel...some call it a firewall but we do not use the F word, so Dash Panel is a source of engine intrusion, particularly the exhaust side and the passenger foot well. A Pillar wind rush can be noticable and some insulation of the A pillar in the area of the windshield can sometimes improve cab noise. My concern on my Ranger is the rear doors which exhibit quite a bit of road noise transmission. Another source is the vibratory response of the pickup box head board of the pickup box. On the old generation of Ranger I had my NVH guy assess this problem and we applied 10"x 14" mastic pads to the head board of the pickup box to address. We had some customer concerns that the mastic did not help, but I had my NVH engineer try a drop in bead liner and thus we issued a engineering solution for this by giving the customer a free bead liner! Nice ace up the sleeve so to speak. Body guys asked me how they could fix the head board and I told them to make it look like a giant waffle. 5G headboard is much better and I am betting my experience with the older Ranger contributed to a much better design. Noise paths can be tricky but you covered many of the potential paths with success. If you do have some areas you might use a simple mechanics stethoscope with the diaphragm and steel probe removed so you have just the tube from the ear piece. It makes a very directional probe and can radar in on a noise path.
Congrats on a fantastic job of noise abatement!
best,
Phil Schilke
Ranger Vehicle Engineering
Ford Motor Co. Retired
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