02120oam 2200553 450 991071350550332120200605135837.0(CKB)5470000002502613(OCoLC)1015642473(EXLCZ)99547000000250261320110215d1970 ua 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierLoudness balance study of selected audiometer earphones determination of the characteristics of three configurations of TDH-39 earphones used in the first three cycles of the Health Examination Survey and the newer TDH-49 earphone, by the method of loudness balance on human subjects /Kenneth C. Stewart and Ernest J. BurgiRockville, Maryland :U.S. Dept. of Health, Education, and Welfare, Public Health Service, Health Services and Mental Health Administration,1970.1 online resource (vi, 37 pages) illustrationsVital and health statistics. Series 2: Data evaluation and methods research ;number 40Public Health Service publication ;no. 1000-series 2-no. 40"December 1970."Includes bibliographical references (page 12).Loudness balance study of selected audiometer earphones AudiometryHeadphonesUnited StatesHearing levelsUnited StatesAudiometryfastHearing levelsfastUnited StatesfastAudiometry.HeadphonesHearing levelsAudiometry.Hearing levels.Stewart Kenneth C.Burgi Ernest J.National Center for Health Statistics (U.S.),SXTSXTOCLCONLCOCLCFOCLCQGPOBOOK9910713505503321Loudness balance study of selected audiometer earphones3491424UNINA