NVH, or Noise, Vibration and Harshness, is the study and modification of the noise and vibration characteristics of vehicles, particularly cars and trucks. - Wikipedia, Feb 2013.
So what exactly is it? In other words: You sit in the car. The car runs, you feel annoyed by the noise e.g. tyre or road noise, rattling noise, tweaking noise, or even ur mother in law keep on nagging. Sorry I cant solve the last problem for you. You're on your own
Too long exposure to certain level...
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