Modeling noise levels due to traffic patterns ("Hornsby, Benjamin Wade Young" )

Subject: Modeling noise levels due to traffic patterns From: "Hornsby, Benjamin Wade Young" <ben.hornsby@xxxxxxxx> Date: Mon, 26 Mar 2012 15:57:26 -0500 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY> --_000_AE2199B600823B4A9CC19B6E88BE0502149495CD87itshcwnem04ds_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi All, The following is a query from a colleague (Wes Grantham) I am working with = on this project. Any suggestions to get us going in the right direction are= greatly appreciated. Thanks much, Ben ****** We are attempting to simulate or model the noise from multiple vehicles (sa= y passing by a position on the street). This is in conjunction with our wor= k with on how traffic noise contributes to overall noise pollution in vario= us street situations (from busy intersections to residential neighborhoods)= . We are starting by simply adding the intensities of single vehicles as they= arrive at the measurement point, taking into account their distances and m= aking an assumption about the attenuation per doubling of distance (a maxim= um of 6 dB would correspond to an anechoic background; presumably a normal = street scene with reflecting objects would have a smaller attenuation per d= oubling of distance). We have thought about modeling the effects of a singl= e building, and how the reflections from that building would affect the ove= rall sound level. Also, we intend to model the occurrence of individual veh= icles (perhaps using a poisson process?), and build into the model such par= ameters as number of lanes, average velocity of the vehicles, distance of t= he measurement point from the street, and average traffic density). Does anyone have any references for work that have done this type of modeli= ng? We have not ventured into this area before and want to make sure we're = on the right track before going too far. Thank you. --_000_AE2199B600823B4A9CC19B6E88BE0502149495CD87itshcwnem04ds_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable <html xmlns:v=3D"urn:schemas-microsoft-com:vml" xmlns:o=3D"urn:schemas-micr= osoft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word" = xmlns:x=3D"urn:schemas-microsoft-com:office:excel" xmlns:p=3D"urn:schemas-m= icrosoft-com:office:powerpoint" xmlns:a=3D"urn:schemas-microsoft-com:office= :access" xmlns:dt=3D"uuid:C2F41010-65B3-11d1-A29F-00AA00C14882" xmlns:s=3D"= uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882" xmlns:rs=3D"urn:schemas-microsof= t-com:rowset" xmlns:z=3D"#RowsetSchema" xmlns:b=3D"urn:schemas-microsoft-co= m:office:publisher" xmlns:ss=3D"urn:schemas-microsoft-com:office:spreadshee= t" xmlns:c=3D"urn:schemas-microsoft-com:office:component:spreadsheet" xmlns= :odc=3D"urn:schemas-microsoft-com:office:odc" xmlns:oa=3D"urn:schemas-micro= soft-com:office:activation" xmlns:html=3D"http://www.w3.org/TR/REC-html40" = xmlns:q=3D"http://schemas.xmlsoap.org/soap/envelope/" xmlns:rtc=3D"http://m= icrosoft.com/officenet/conferencing" xmlns:D=3D"DAV:" xmlns:Repl=3D"http://= schemas.microsoft.com/repl/" xmlns:mt=3D"http://schemas.microsoft.com/share= point/soap/meetings/" xmlns:x2=3D"http://schemas.microsoft.com/office/excel= /2003/xml" xmlns:ppda=3D"http://www.passport.com/NameSpace.xsd" xmlns:ois= =3D"http://schemas.microsoft.com/sharepoint/soap/ois/" xmlns:dir=3D"http://= schemas.microsoft.com/sharepoint/soap/directory/" xmlns:ds=3D"http://www.w3= .org/2000/09/xmldsig#" xmlns:dsp=3D"http://schemas.microsoft.com/sharepoint= /dsp" xmlns:udc=3D"http://schemas.microsoft.com/data/udc" xmlns:xsd=3D"http= ://www.w3.org/2001/XMLSchema" xmlns:sub=3D"http://schemas.microsoft.com/sha= repoint/soap/2002/1/alerts/" xmlns:ec=3D"http://www.w3.org/2001/04/xmlenc#"= xmlns:sp=3D"http://schemas.microsoft.com/sharepoint/" xmlns:sps=3D"http://= schemas.microsoft.com/sharepoint/soap/" xmlns:xsi=3D"http://www.w3.org/2001= /XMLSchema-instance" xmlns:udcs=3D"http://schemas.microsoft.com/data/udc/so= ap" xmlns:udcxf=3D"http://schemas.microsoft.com/data/udc/xmlfile" xmlns:udc= p2p=3D"http://schemas.microsoft.com/data/udc/parttopart" xmlns:wf=3D"http:/= /schemas.microsoft.com/sharepoint/soap/workflow/" xmlns:dsss=3D"http://sche= mas.microsoft.com/office/2006/digsig-setup" xmlns:dssi=3D"http://schemas.mi= crosoft.com/office/2006/digsig" xmlns:mdssi=3D"http://schemas.openxmlformat= s.org/package/2006/digital-signature" xmlns:mver=3D"http://schemas.openxmlf= ormats.org/markup-compatibility/2006" xmlns:m=3D"http://schemas.microsoft.c= om/office/2004/12/omml" xmlns:mrels=3D"http://schemas.openxmlformats.org/pa= ckage/2006/relationships" xmlns:spwp=3D"http://microsoft.com/sharepoint/web= partpages" xmlns:ex12t=3D"http://schemas.microsoft.com/exchange/services/20= 06/types" xmlns:ex12m=3D"http://schemas.microsoft.com/exchange/services/200= 6/messages" xmlns:pptsl=3D"http://schemas.microsoft.com/sharepoint/soap/Sli= deLibrary/" xmlns:spsl=3D"http://microsoft.com/webservices/SharePointPortal= Server/PublishedLinksService" xmlns:Z=3D"urn:schemas-microsoft-com:" xmlns:= st=3D"" xmlns=3D"http://www.w3.org/TR/REC-html40"><head><meta http-equi= v=3DContent-Type content=3D"text/html; charset=3Dus-ascii"><meta name=3DGen= erator content=3D"Microsoft Word 12 (filtered medium)"><style></style></head><body lang=3DEN-US link=3Dblue vli= nk=3Dpurple><div class=3DWordSection1>Hi All,<o:p></o:= p>The following is a query from a colleague (Wes Grantham) = I am working with on this project. Any suggestions to get us going in the r= ight direction are greatly appreciated.<o:p></o:p><o= :p> </o:p>Thanks much,<o:p></o:p><o:p> </o:p>Ben<o:p></o:p><= p class=3DMsoNormal><o:p> </o:p>****** <o:p></o:p></span= >We are attempting to simulate or model the noise from mult= iple vehicles (say passing by a position on the street). This is in conjunc= tion with our work with on how traffic noise contributes to overall no= ise pollution in various street situations (from busy intersections to= residential neighborhoods).<o:p></o:p>&nbs= p;<o:p></o:p>We are starting by simply adding the intensiti= es of single vehicles as they arrive at the measurement point, taking into = account their distances and making an assumption about the attenuation per = doubling of distance (a maximum of 6 dB would correspond to an anechoic bac= kground; presumably a normal street scene with reflecting objects would hav= e a smaller attenuation per doubling of distance). We have thought abo= ut modeling the effects of a single building, and how the reflections from = that building would affect the overall sound level. Also, we intend to mode= l the occurrence of individual vehicles (perhaps using a poisson process?),= and build into the model such parameters as number of lanes, ave= rage velocity of the vehicles, distance of the measurement point from the s= treet, and average traffic density).<o:p></o:p> <o:p></o:p>Does anyone have any references for wo= rk that have done this type of modeling? We have not ventured into this are= a before and want to make sure we're on the right track before going too fa= r.<o:p></o:p> <o:p></o:p>Thank you.<o:p></o:p><o:p> </o:p><= /p><o:p> </o:p></div></body></html>= --_000_AE2199B600823B4A9CC19B6E88BE0502149495CD87itshcwnem04ds_--

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Electrical Engineering Dept., Columbia University