The considered investigation was conducted on board a number of aircraft during regular flights. The investigation was mainly concerned with noise conditions and the vibrations to which the entire body of a cabin attendant had been subjected. The types of aircraft studied included the Douglas 8, Douglas 9, Douglas 10, and Boeing 747. The noise was recorded with the aid of tape recorders at various locations in the cabin, taking into account different phases of the flight. Four cabin attendants were carrying noise dose meters during their entire working period in order to record the amount of noise they are exposed to. The vibration levels were found to be very low. In most cases the levels are below the reference curves for 'fatigue decreased proficiency' except for measurements conducted on a DC 8 at a jump seat at the back galley.