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ID:39840079
大小:184.50 KB
页数:5页
时间:2019-07-12
《Infrasound pressure meter and examples of measuring data》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、JOURNALOFLOWFREQUENCYNOISE,VIBRATIONANDACTIVECONTROLPages15-19InfrasoundPressureMeterandExamplesofMeasuringDataKiyokatsuIwahashi1,HiroakiOchiai21RionCo.,Ltd.3-30-41HigashimotomachiKokubunjiTokyo185-8533,2KobayasiInstituteofPhysicalResearch,3-2-41HigashimotomachiKokubunjiTokyo1
2、85-0022,JapanReceived8April2000SUMMARYRecently,complaintsaboutlowfrequencynoiseareincreasinginJapan.InInter-Noise‘99,Ochiaihasreportedthefollowingthreekindsofevaluationmethodsforeffectscausedbyinfraandlowfrequencynoise.(1)Anevaluationforrattlingofdoorsorwindows.(2)Anevaluation
3、forpsychologicalandsleepeffects(3)Anevaluationforoppressiveorvibratorysensation.Wehavedevelopedameasuringinstrumentcorrespondingtotheaboveevaluationmethods.Inthisreport,anoutlineoftheinstrumentandexamplesofinfraandlowfrequencynoisedataareintroduced.INTRODUCTIONInrecentyearsinf
4、rasonicandlowfrequency(ILF)noiseproblemshaveattractedalotofattention,withincreasingnumbersofcomplaints.Morethanhalfofthesecomplaintsareinregardtonoiseorvibration,mostofwhichisrecognizedbyrattlingofstructures.Thesoundpressurelevelwhichmakeswindowsordoorsrattlehasdifferentcharac
5、teristicfrequenciesfromthesoundpressurelevelwhichahumansensesasILFnoise.Basedonthis,OchiaiandhisstudygrouphaveproposedanevaluationmethodforILFnoisein“Inter-noise99”(1).AninstrumenttomeasureILFnoisehasrecentlybeendevelopedbyus,basedonthatidea.Inthispaper,thefeaturesofthemeteran
6、dexamplesofILFnoisemeasuredinthefieldwillbepresented.EvaluationmethodofILFnoiseTheproposedevaluationmethod1)ofILFnoiseisasfollows:TherangeoffrequenciesofILFnoiseisdefinedas1-80Hzatthecentralfrequenciesof1/3octavebands.TheinfluencecausedbyILFnoiseshouldbeevaluatedonthethreefoll
7、owingaspects;(1)TherattlingofdoorsorwindowsinahousecausedbyILFnoise.(2)Thepsychologicaleffectsanddisturbanceofsleepcausedbyinfrasound.(3)Theoppressiveorvibratorysensationcausedbylowfrequencynoise.Theevaluationlevelsofeachitemaboveshouldbeasfollows:(1)1/3octavebandsoundpressure
8、level(5-50Hz)(2)1/3octavebandsoundpressurelevel(5-80Hz)(3)Gwe
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