In order to evaluate the feasibility of conducting a hearing testing program under various conditions of an operational cruise aboard a CVA type aircraft carrier, an audiometric test room (modified 1AC Model 1203) was installed aboard theUSS Saratoga. The audiometric test equipment that was placed in the test room consisted of one individual and two group audiometers—namely, (a) the Rudmose ARJ‐3, (b) the Maico Group Audiometer R‐4 (a pure tone pulse test with single descent feature in 10‐db intensity steps), and (c) the Ampex Group Audiometer Model S‐3510 (reported as the NMRL Group Monitoring and Screening Audiometer). Two groups of subjects were tested to obtain hearing levels as determined by each audiometer during three conditions—namely, (1) in port, (2) underway, and (3) during catapult operations. The general effectiveness of the test room will be discussed in terms of ambient noise in the room and the measured noise reduction. The hearing data will be presented so as to show comparisons among the three audiometers as well as among the three conditions of testing.