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Road noise at highway speeds coming from wheel wells

Discussion in 'Model S: Driving Dynamics' started by Discoducky, Oct 31, 2012.

  1. Discoducky

    Discoducky Active Member

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    On our last test drive down the 405 and I-90 in Seattle my wife and I noticed quite a bit of road noise coming from the wheel wells. I don't believe this car was a production spec car, but it was a MSP so that may have added to the noise due to the different sticky tires.

    So I'm wondering if current sig owners have noticed quite a bit of noise coming through the wheel wells at highway speeds? NOTE: Our highways in Seattle are very rough and rutted due to winter studded

    I'm hoping that TM has been working on reducing this noise with sound dampening material for production cars.
     
  2. Brandonm

    Brandonm Member

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    Was your test drive done in the Gray demo car or the Green one?
     
  3. ckessel

    ckessel Active Member

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    I noticed the road noise, but I don't think it was any different than with other cars I've driven, just that normally the engine noise helps mask it.
     
  4. Velo1

    Velo1 Member

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    Road noise inside the cockpit will mostly be a function of the road surface (smooth asphalt, concrete, chip seal, etc.), with a secondary contribution based on the tire (make, model, tread pattern). Then wet road generate more noise than dry surfaces. The only constant here is the sound transmission loss provided by the structure of the car, and I think the Model S has excellent properties toward blocking sound transmission. I base this conclusion on my experience as a P.E. and Board Cert. Noise Control Engineer. I have carefully inspected one test-drive Model S, and came away very impressed and satisfied TMC did a very good job.
     
  5. VolkerP

    VolkerP EU Model S P-37

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    I found out that the road noise from the rear wheels was noticeably attenuated by the parcel shelf. This was in a Toyota. So stay tuned for your parcel shelf and start experimenting once you get it!
     
  6. DrComputer

    DrComputer Member

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    Having sold my Lexus LS600hl (to my business partner) and purchased the S as its replacement I have a unique perspective on how quiet a true luxury car can be. I've now had almost two weeks to drive the S on the roads that I use to drive all the time in the Lexus. Hands down the Lexus is a MUCH quieter car than the S in almost every driving situation. The only time the Lexus would be slightly louder was under full throttle acceleration when the gas engine could be heard. One of the biggest reasons the Lexus was so quiet is that it had double-pane glass on all windows. This makes a huge difference but also adds weight. I also think the Panoramic roof without a solid shade lets a lot of sound enter the cabin. I do think that once we all get our rear parcel shelves that will help. The S is a quiet car. It is not, however, as quite as other cars in the $80k+ range.
     
  7. brianman

    brianman Burrito Founder

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    /confused
     
  8. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

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    Automotive sounds are very hard to pin down because they often appear to come from someplace other than the actual sound source.
     
  9. cinergi

    cinergi Active Member

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    I find the car to be ridiculously quiet at highway speeds. The only time I hear something intrusive is debris kicking around the wheel wells ... I'm very happy with the interior cabin quietness at highway speeds ...
     
  10. miemrich

    miemrich Member

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    Hi Dr. Computer,

    could you please provide me with some information about your 6kW Solar System? Vendor, # and type of panels, manufacturer, cost, time frame, what is Tigo optimization and monitoring. 6kW would be the size I need on my roof.

    Thank you. I appreciate it.
    Mike
     
  11. Discoducky

    Discoducky Active Member

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    That is good to hear or not hear :wink:

    Green
     
  12. ckessel

    ckessel Active Member

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    The couple reviews that included decibel counts showed the opposite, that the Model S was quieter than the competition. For example, from Edmunds the only place the Lexus 460 beats Tesla is at the 70mph cruise.

     
  13. Zextraterrestrial

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    Compared to a 2004 Lexus LS 430 the S is MUCH quieter. The LS 460s (>70K?) do cost a bit more than the 430 did new (58K?)
    After driving the S then getting into the Lexus - laughable! Noisy, slow, sloppy steering, bouncy..

    Does the LS460 have noise cancellation in the Stereo ?? that can make a big difference in sound
     
  14. Chgd Up

    Chgd Up Sig 1004

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    I get some road noise coming from the rear wheel wells on rougher Seattle roads. I've sat in the back seats to localize it and it sounds like it is coming out from the C pillars/rear seat belt slot area. The rear strut towers are built into these. I'm thinking of trying some Thinsulate acoustic sound absorb-er in this area.
     
  15. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

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    Road noise typically comes through holes in the body, so the first thing to do is to see if there are any holes that need sealing. (For example, where wiring is going through.)
     
  16. Jaff

    Jaff Active Member

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    +1 ...to me, it is every bit as quiet as our (former) Lexus GS 450h and RX 450h...

     
  17. JoshG

    JoshG Member

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    I bet some of what you're hearing is not, technically, road noise. as I posted on my 700+ mile drive in <24 hours, once you're cruising at highway speed for a while, you definitely start to notice noise from the motor itself. I could tell the difference when the road surface changed... the road/tire noise went up, down, or changed in pitch, but the hum from the motor was a separate constant noise. I wish there were better noise insulation around the motor compartment. Roadsters always had this problem and eventually Tesla offered optional sound deadening upgrades.
     
  18. Chgd Up

    Chgd Up Sig 1004

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    #18 Chgd Up, Dec 29, 2012
    Last edited: Jan 1, 2013
    Agreed, at first I thought this might be the location of the cabin exhaust drafters allowing sound into the cabin. I asked one a service tech who stated he didn't believe the Model S has drafters which may contribute to the difficulty in closing the last door even with the window roll down feature. I pulled one of the wheel liners which are a soft non woven absorber material but it didn't look like there were any obvious holes just the strut tower opening extending pretty high into the C pillar.

    I do hear the power train noise it is different from the road tire noise and is a somewhat pleasant low hum.
     
  19. Chgd Up

    Chgd Up Sig 1004

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    Service replaced my door harness and the door front seals didn't go back exactly the same. This resulted in a little whistle/leakage at the front door front corner. I was able to replace the seals pretty easily.
     
  20. thomas.rueesch

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    Couldn't this be a firmware upgrade option?
    Given that the Model S has an inside microphone and speakers
    the sound could maybe be filtered out/addjusted actively?
     

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