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035   $a(CKB)5470000002502613
035   $a(OCoLC)1015642473
035   $a(EXLCZ)995470000002502613
100   $a20110215d1970      ua             0
101 0 $aeng
135   $aur|||||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 00$aLoudness balance study of selected audiometer earphones $edetermination of the characteristics of three configurations of TDH-39 earphones used in the first three cycles of the Health Examination Survey and the newer TDH-49 earphone, by the method of loudness balance on human subjects /$fKenneth C. Stewart and Ernest J. Burgi
210  1$aRockville, Maryland :$cU.S. Dept. of Health, Education, and Welfare, Public Health Service, Health Services and Mental Health Administration,$d1970.
215   $a1 online resource (vi, 37 pages) $cillustrations
225 1 $aVital and health statistics. Series 2: Data evaluation and methods research ;$vnumber 40
225 1 $aPublic Health Service publication ;$vno. 1000-series 2-no. 40
300   $a"December 1970."
320   $aIncludes bibliographical references (page 12).
517   $aLoudness balance study of selected audiometer earphones 
606   $aAudiometry
606   $aHeadphones$zUnited States
606   $aHearing levels$zUnited States
606   $aAudiometry$2fast
606   $aHearing levels$2fast
607   $aUnited States$2fast
615  0$aAudiometry.
615  0$aHeadphones
615  0$aHearing levels
615  7$aAudiometry.
615  7$aHearing levels.
702   $aStewart$b Kenneth C.
702   $aBurgi$b Ernest J.
712 02$aNational Center for Health Statistics (U.S.),
801  0$bSXT
801  1$bSXT
801  2$bOCLCO
801  2$bNLC
801  2$bOCLCF
801  2$bOCLCQ
801  2$bGPO
906   $aBOOK
912   $a9910713505503321
996   $aLoudness balance study of selected audiometer earphones$93491424
997   $aUNINA