Does manipulation/adjusting make noise?
Usually, yes. There are times, however, when no noise happens because the area manipulated is too tight to “release” with a reasonable amount of force. Also, there is a period of time following a release during which no additional noise will be made for another 20 – 30 minutes. If you “pop” your own neck just before a treatment, that particular area will probably not “pop” again during the treatment.