bad vibrations short version air conditioning hotel builds harmonic modulating vibration ducts coming basement, room air returns coming 2 minute buildup release noise drove nuts, figured nicely moved room realize problem probably hear rooms loud did not drive nuts low level, liked open windows hotel right i-5 continuously traveled types vehicles quite loud windows open not.the normal level great marriott service pleasant not stay facility changes air,  
bad vibrations short version air conditioning hotel builds harmonic modulating vibration ducts coming basement, room air returns coming 2 minute buildup release noise drove nuts, figured nicely moved room realize problem probably hear rooms loud did not drive nuts low level, liked open windows hotel right i-5 continuously traveled types vehicles quite loud windows open not.the normal level great marriott service pleasant not stay facility changes air,  