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Low frequency sound/air pressure sensation

Discussion in 'Model S: Ordering, Production, Delivery' started by sffrog, Jan 26, 2013.

  1. sffrog

    sffrog New Member

    Joined:
    Jan 26, 2013
    Messages:
    4
    Location:
    Palo Alto, CA
    Hello all-

    I will finalize my order next week (probably P85 white), and test drove a P85 yesterday in Menlo Park.
    I loved the drive, as did my wife. We have been test driving a number of car of late, including Maserati GT, Jaguar XF supercharged and Porsche Panamera S.
    None of these cars come close - in fact, the wife nailed it: the Tesla feels so much lighter. I believe it is because of the instant acceleration, which _does_ make the car feel so agile.

    Let me come to the question that I have for you, worthy members of this community:
    as I was driving yesterday, I was bothered by some kind of low frequency booming 'sound'. It is so low frequency that I hesitate to call it a sound, more like a air pressure variation, akin to what you feel when you have only one window open in a car, and you feel the pressure variation. But I clearly felt it, mostly around 20mph.
    The sales guys did not feel it (he was sitting at the back).

    Has anyone experienced this? For those who have, please let me know if you have the pano roof (as I suspect it may cause this sensation).

    It is the only thing thing bugging me at this stage.

    Many thanks to all. I will post more post delivery I guess.
     
  2. ToddRLockwood

    ToddRLockwood Active Member

    Joined:
    Sep 11, 2012
    Messages:
    1,263
    Location:
    Burlington, Vermont
    Saw this on a "hidden features" post:

    -If you experience a very low frequency pressure fluctuation on certain roads (like you're inside a bass drum being thwacked), adjust the two set screws with bumpers on them inside the rear liftgate. This will stop the hatch from oscillating under certain road conditions.
     
  3. sffrog

    sffrog New Member

    Joined:
    Jan 26, 2013
    Messages:
    4
    Location:
    Palo Alto, CA
    Is that it then?? Many many thanks!
    Any other person experiencing this? It is not all in my head then, right?
     
  4. captain_zap

    captain_zap Electron tamer

    Joined:
    Mar 27, 2012
    Messages:
    147
    Location:
    Redmond, WA
    The other possibility is that you are hearing the climate control heat pump compressor, located under the frunk. It's variable speed so can generate subsonic vibrations, like a super low bass note. It's quite noticeable when the car is parked with climate control on and it's working hard to achieve the set point. Some people may not be able to hear it.
     
  5. brianman

    brianman Burrito Founder

    Joined:
    Nov 10, 2011
    Messages:
    15,487
    No, it's in your head* but try the workaround as well. ;)

    * Unless your ears have undergone some interesting surgery.
     
  6. clmazin

    clmazin Member

    Joined:
    Dec 1, 2012
    Messages:
    43
    Location:
    Southern California
    You're not the only one. Far from it. There's a thread somewhere in here where a few of us discuss this. The rubber screw trick definitely helped *a lot* for me, although I still feel it from time to time.

    Search the forum for "buffeting" and you'll find the old posts.

    And rest assured, you're not insane.

    Or, at least... *this* isn't why you're insane.
     

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