Great video, Scott! Do you want to get some more practice on my 18” Model 3? How do you keep from triggering a low tire pressure monitor when you lower your pressure to 39psi?
You could purchase tires that are less noisy. I would also assume that absorbing the road noise inside the wheel arch would help, as its close to the source.
I think i know the space that you are talking about, but isnt that space designed so that the sound from the sub can come through? I am thinking it might be best to sound insulate the outer envalope of the trunk
@@SDTesla Agreed, the rear subwoofer is already lacking in my opinion. I've read online that the cut-out is to allow air to escape the cabin in fresh-air HVAC mode.
Are these tests on asphalt or concrete? I just did some testing on the car stock with an iPhone app and received similar highway results. Mine was on concrete. 20" PS4, 40psi
Seems a valid comparison would be with dynamat compared to without dynamat with same tires and pressure? What am I missing? Doing that it seems that the dynamat actually increased the noise? Why dynamat for noise when closed cell foam is supposed to be better for noise reduction? Interesting observation about the side panel next to back seat. By the way, inside the A pillar looks very similar with lots of holes.
Eric, Good eye. You have caught a typo in my excel model. The last comparison (where they yellow rows are seperated @ 6:57) row 6 should actually read 20 - Summer. Sorry about that. Frankly, I used Dynamat because that was a name I had heard, so I started there. What would you suggest for a closed cell foam? I could do that as well, it wouldnt hurt, right? If I can get the A pillar trim off, i am going to do that and the rear side panels after the doors. Thanks!!
@@SDTesla Ok good, glad to see you are comparing apples to apples. We're on the same mission...I've seen on the forums discussion of closed cell foam and it's available in format similar to dynamat....thin, stick on. I think I will try something like that but I don't have a brand name for you. Also saw a post of a guy that added more door seals and claims a significant noise reduction. I just ordered the Tesla sunshades as I hear they cut down on the noise bouncing around the cabin. I plan to test out the impact of the shades, but too windy today to get a valid comparison.
That's not correct. The perceived loudness is 2x as loud every 10db. Thats what we really care about when talking about noise. However, it takes 2x the power to increase the level by 3db in audio systems, which is maybe where you got that figure from.
Given that the dB scale is logarithmic, every ~10dB equates to a doubling of perceived loudness. I would say a 10% reduction is pretty good. (this is not accounting for all the known flaws and inaccuracies in my measurement technique.)
great data, thanks. looking forward to next results
Good job! Thanks for posting your results so quickly, even if piecemeal. You're performing a useful public service.
Nice analyzing!
Great job 👍. Can you tell me the sound on closing the door change to a more solid door?
Good stuff, Scott! I like how you build knowledge here around that noise topic. Btw, what’s the groovy music you have used at the end of the video?
Great video, Scott! Do you want to get some more practice on my 18” Model 3? How do you keep from triggering a low tire pressure monitor when you lower your pressure to 39psi?
I didn’t do anything special. I haven’t gotten a warning yet
SD Tesla I got one at 40 lbs.
You could purchase tires that are less noisy. I would also assume that absorbing the road noise inside the wheel arch would help, as its close to the source.
I am very close to doing the wheel arches or front firewall next. Should I have any concerns about sound deadening on the “outside” of the car?
Sorry Scott, can you help me what‘s that song you are using at the end of the clip? Thanks
Have you tried applying dynamat on the sheet metal between the rear trunk and the speaker grille, located behind the rear seats?
I think i know the space that you are talking about, but isnt that space designed so that the sound from the sub can come through? I am thinking it might be best to sound insulate the outer envalope of the trunk
@@SDTesla Agreed, the rear subwoofer is already lacking in my opinion. I've read online that the cut-out is to allow air to escape the cabin in fresh-air HVAC mode.
Are these tests on asphalt or concrete? I just did some testing on the car stock with an iPhone app and received similar highway results. Mine was on concrete. 20" PS4, 40psi
Bay bridge, so I’m assuming concrete. I’ll pay attention next time I cross it
have you sound dampened the floorboards below the driver and passengers?
Seems a valid comparison would be with dynamat compared to without dynamat with same tires and pressure? What am I missing? Doing that it seems that the dynamat actually increased the noise? Why dynamat for noise when closed cell foam is supposed to be better for noise reduction? Interesting observation about the side panel next to back seat. By the way, inside the A pillar looks very similar with lots of holes.
Eric, Good eye. You have caught a typo in my excel model. The last comparison (where they yellow rows are seperated @ 6:57) row 6 should actually read 20 - Summer. Sorry about that. Frankly, I used Dynamat because that was a name I had heard, so I started there. What would you suggest for a closed cell foam? I could do that as well, it wouldnt hurt, right? If I can get the A pillar trim off, i am going to do that and the rear side panels after the doors. Thanks!!
@@SDTesla Ok good, glad to see you are comparing apples to apples. We're on the same mission...I've seen on the forums discussion of closed cell foam and it's available in format similar to dynamat....thin, stick on. I think I will try something like that but I don't have a brand name for you. Also saw a post of a guy that added more door seals and claims a significant noise reduction. I just ordered the Tesla sunshades as I hear they cut down on the noise bouncing around the cabin. I plan to test out the impact of the shades, but too windy today to get a valid comparison.
4:25 dB are logarithmic but it's not doubling every 10, it's every 3 !!
So every dB is 33% noise louder/quieter
Hey Thanks for the correction! That inspires me to keep going to see just how quiet i can get it.
That's not correct. The perceived loudness is 2x as loud every 10db. Thats what we really care about when talking about noise. However, it takes 2x the power to increase the level by 3db in audio systems, which is maybe where you got that figure from.
@@ryen7512 The video says both perceived loudness, and then says power. So the correction is appropriate for the latter.
This is wrong, the energy needed to increase a sound by 3db is double, the perceived loudness doubling is 10db.
Did this make the sound of your doors closing any different?
Looks like you are in Twin Peaks 😃
there will be difference between dry and wet road surface
Agreed. That’s why I didn’t compare the different wheels/tires. Too much of a difference in conditions.
Theres a part of the video where theres 3 teslas in view
If they closed your favorite road, than you would be able to drive on it, @ all. Lol! 😁
Well played sir!
1 dB wow that was anti-climatic
Given that the dB scale is logarithmic, every ~10dB equates to a doubling of perceived loudness. I would say a 10% reduction is pretty good. (this is not accounting for all the known flaws and inaccuracies in my measurement technique.)
Tint your windows, will decrease it a lot.
They are. 3M crystalline all but windshield
Tint the windshield too.....with clear or almost clear..