rumble, on records or from turntable?


I've noticed that, when listening to records using my headphones, I hear a definite rumble at the beginning of the side and in between cuts. Basically only on the parts with little or no volume. It seems that different records have different amounts of rumble. This indicates that it might be something recorded onto the record. My question is, how much of this rumble is coming from the turntable and how much is recorded into the record? Is there a way to check the amount of rumble coming from your turntable?
winggo
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To check TT rumble, test records are made with a "silent groove". I am sure that these test records are not perfect, so the "silent" groove really ought to be called the "as good as it gets" groove.

Many LPs do have LF rumble recorded into the grooves, and you can't do much about it unless you use a rumble filter. A common cause for this LF noise was the air conditioning systems in the recording halls. This was never a problem until the LF response of audio systems improved. When these LPs are played on a non-audiophile system there is no problem.