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John L. Fletcher reviews prior evidence that intense auditory stimulation can produce bidirectional effects, defined as sensitization (lowered normal threshold or increased acuity), sometimes depending on test-tone frequency and exposure conditions. The work evaluates a theoretical account linked to post-tetanic potentiation by comparing expected sensitization inside a filtered gap with reduced or absent effects in the gap due to diminished tetanization, using filtered and unfiltered noise as controls. ",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/psychological-monographs-general-and-applied-no-433-pure-tone-thresholds-following-stimulation-by-narrow-band-filtered-noise/323877/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/psychological-monographs-general-and-applied-no-433-pure-tone-thresholds-following-stimulation-by-narrow-band-filtered-noise/323877.png","ImageObject",300,407,{"name":92,"@type":93},"Lucas Martin","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-06","2026-09-21",true,{"@type":102,"interactionType":103,"userInteractionCount":29},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What effect does intense auditory stimulation have on auditory sensitivity?","Question",{"text":112,"@type":113},"It can be bidirectional: sensitivity may increase or decrease after stimulation, often described as sensitization when thresholds lower or acuity rises.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How is sensitization defined in the document?",{"text":117,"@type":113},"Sensitization is defined as a lowering of the normal auditory threshold, or conversely an increase in normal auditory acuity.",{"name":119,"@type":110,"acceptedAnswer":120},"Why compare narrow-band filtered noise with an unfiltered noise control?",{"text":121,"@type":113},"A filtered gap is expected to receive less stimulation during exposure, which should yield different poststimulatory responses inside the gap; unfiltered noise serves to test the hypothesis.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},323877,1790811353,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":29,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":46,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":31,"preview_page_count":4},8796095360427,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","No.433  \n1957  \n| Pure-Tone Thresholds Following Stimulation  \u003Cbr>by Narrow-Band Filtered Noise  \u003Cbr>By  \u003Cbr>John L.Fletcher  \u003Cbr>Army Medical Research Laboratory,Fort Knox,Kentuch)   |\n| --- |\n\nlohn L. Fletcher  \nVol.71  \nNo.4  \n# chologicalMonographs\n\neneral and AppliedPricc S1.00  \nEdited by Herbert S.ConradPublished by The American Psychological Association,Inc.  \n## Psychological Monographs:General and Applied\n\nCombining the Applied Psychology Monographs and the Archives of Psychologywith the Psychological Monographs  \nHERBERT S.CONRAD,Editor  \nDepartment of Health,Education,and Welfare  \nOffice of Education  \nWashington 25,D.C.  \nConsulting Editors  \nHAROLD E.JONES  \nDONALD E.BAIER  \nDoNALD W.MACKINNON  \nFRANK A.BEACH  \nLORRIN A.RiGGS  \nROBERT G.BERNREUTER  \nCARL R.RoGERS  \nW1LLIAM A.BROVNELL  \nSAUL RoSENZWEIG  \nHAROLD E.BURTT  \nRoss STAGNER  \nJERRY W.CARTER,JR.  \nPERCIVAL M.SYMONDS  \nCLYDE H.CooMBS  \nJoSEPH TIFFIN  \nJoHN F.DASHIELL  \nLEDYARD R TUCKER  \nEUGENIA HANFMANN  \nJOSEPH ZUBIN  \nEDNA HEIDBREDER  \nARTHUR C.HoFFMAN,Managing EditorHELEN ORR,Assistant Managing EditorEditorial Staff:FRANCES H.CLARK,BARBARA CUMMINGS,SADIE J.DoYLE  \nMANUSCRIPTs should be sent to the Editor.  \nBecause of lack of space,the Psychological Monographs can print only the originalor advanced contribution of the author.Background and bibliographic materialsmust,in general,be totally excluded or kept to an irreducible minimum.Statisticaltables should be used to present only the most important of the statistical data orevidence.  \nThe first page of the manuscript should contain the title of the paper,the author'sname,and his institutional connection (or his city of residence).Acknowledgmentsshould be kept brief,and appear as a footnote on the first page.No table of contentsneed be included.For other directions or suggestions on the preparation of manu-scripts,see:CONRAD,H.S.Preparation of manuscripts for publication as mono-graphs.J.Psychol.,1948,26,447-459.  \nCORRESPONDENCE CONCERNING BUSINESS MATTERS(such as subscriptions and sales,change of address,etc.)should be addressed to the American Psychological Associa-tion,Inc.,1333 Sixteenth St.N.W.,Washington 6,D.C.Address changes must arriveby the 1oth of the month to take effect the following month.Undelivered copiesresulting from address changes will not be replaced;subscribers should notify thepost office that they will guarantee third-class forwarding postage.  \nCoPYRIGHT,1957,BY THE AMERICAN PsYCHOLOGICAL,AssOCIATION,INC.  \n## Pure-Tone Thresholds Following Stimulation by\n\nNarrow-Band Filtered Noise¹  \nJoHN L.FLETCHER  \nIst Lt.,MSC,USAArmy Medical Research Laboratory,Fort Knox,Kentucky²  \nHE literature regarding auditory fa-  \nL.tigue is abundant.Without attempt-ing an exhaustive review of the litera-ture,the studies of Causse and Chavasse  \n(3),Davis et al.(5),Epstein(7),Harris(10,11,12).Hirsh and Ward(14),Rawdon-Smith (22),Rawnsley and Har-ris(23,24),and Rosenblith (25),Rosen-blith,Galambos,and Hirsh(26),andRosenzweig and Rosenblith(27)showthat inuch effort has been exerted to re-late such factors as the frequency,inten-sity,and duration of exposure of testsounds topoststimulatory auditorythresholds.  \nEvidence has appeared indicating that audi-tory poststimulatory effects can be bidirectional,  \ni.e.,either an increase or a decrease in auditorysensitivity can follow intense auditory stimula-tion.Several investigators have reported what hascome to be called“sensitization”(1,2,4,5,8,  \n12,13,14,15,16,21)following stimulation.It ishere defined as a lowering of the normal auditorythreshold (or conversely,an increase in normalauditory acuity).Some investigators(1,13,16)report that sensitization varies with the frequencyof the test tone or with the frequency of the ex-posure tone.Bronstein (1)found that sensitiza-  \ntion was less for low frequency tones and increas-ingly greater for higher frequencies.Hughes(15)noted maximum sensitization at 300-500 cps.Healso reported that one of his three extens","cbCaiqYFzoVqahYz","https://ap.wps.com/l/cbCaiqYFzoVqahYz","pdf",922668,"English","# Psychological Monographs: General and Applied\n## Pure-Tone Thresholds Following Stimulation by Narrow-Band Filtered Noise","[{\"question\":\"What effect does intense auditory stimulation have on auditory sensitivity?\",\"answer\":\"It can be bidirectional: sensitivity may increase or decrease after stimulation, often described as sensitization when thresholds lower or acuity rises.\"},{\"question\":\"How is sensitization defined in the document?\",\"answer\":\"Sensitization is defined as a lowering of the normal auditory threshold, or conversely an increase in normal auditory acuity.\"},{\"question\":\"Why compare narrow-band filtered noise with an unfiltered noise control?\",\"answer\":\"A filtered gap is expected to receive less stimulation during exposure, which should yield different poststimulatory responses inside the gap; unfiltered noise serves to test the hypothesis.\"}]","Psychological Monographs: General and Applied - No. 433 - Pure-Tone Thresholds Following Stimulation by Narrow-Band Filtered Noise | PDF",1789966421]