Subject: Re: Modeling noise levels due to traffic patterns From: Ernesto Accolti <ernestoaccolti@xxxxxxxx> Date: Mon, 26 Mar 2012 18:33:49 -0300 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>--0015175cfa3047654504bc2c21ef Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hi Ben, We have thought about modeling the effects of a single building, and how > the reflections from that building would affect the overall sound level. > I think you should take into account the spectral information. You can search for the Harmonoise models or the CNOSSOS project. ( http://sicaweb.cedex.es/docs/documentos/CNOSSOS-JRCdraft.pdf) > Also, we intend to model the occurrence of individual vehicles (perhaps > using a poisson process?) > We currently use a Poisson process model, but, you should not forget that this approach is not very realistic because a Poisson process stands for no-related events and obviously the time of occurrence of a car passby is related to many factors on the nexts and previous cars. More sophisticated models are available such as microsimulation traffic models that you can also buy implemented as dedicated software. I think this links can talk by themselves: http://www.traffic-simulation.de/ "The influence of traffic flow dynamics on urban soundscapes" from Decoensel et al. Applied Acoustics 66 (2005) pp. 175=96194 Hope it helps. Best regards, Ernesto. -- Ernesto Accolti CONICET PhD Fellow at Acoustics and Electroacoustics Laboratory National University of Rosario Argentina. --0015175cfa3047654504bc2c21ef Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hi Ben, <br><div class=3D"gmail_quote"><br><blockquote class=3D"gmail_quote= " style=3D"margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);= padding-left:1ex"><div link=3D"blue" vlink=3D"purple" lang=3D"EN-US"><div><= p class=3D"MsoNormal"> <span style=3D"font-size:10pt;font-family:"Arial","sans-seri= f"">We have thought about modeling the effects of a single building, a= nd how the reflections from that building would affect the overall sound le= vel. </span></p> </div></div></blockquote><div><br>I think you should take into account the = spectral information. You can search for the Harmonoise models or the CNOSS= OS project. (<a href=3D"http://sicaweb.cedex.es/docs/documentos/CNOSSOS-JRC= draft.pdf">http://sicaweb.cedex.es/docs/documentos/CNOSSOS-JRCdraft.pdf</a>= )<br> =A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0pt 0pt 0pt 0.8e= x;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div link=3D"blu= e" vlink=3D"purple" lang=3D"EN-US"><div><p class=3D"MsoNormal"><span style= =3D"font-size:10pt;font-family:"Arial","sans-serif"">Al= so, we intend to model the occurrence of individual vehicles (perhaps using= a poisson process?)</span></p> </div></div></blockquote><div><br>We currently use a Poisson process model,= but, you should not forget that this approach is not very realistic becaus= e a Poisson process stands for no-related events and obviously the time of = occurrence of a car passby is related to many factors on the nexts and prev= ious cars. More sophisticated models are available such as microsimulation = traffic models that you can also buy implemented as dedicated software.<br> <br>I think this links can talk by themselves:<br><a href=3D"http://www.tra= ffic-simulation.de/">http://www.traffic-simulation.de/</a><br>"The inf= luence of traffic flow dynamics on urban soundscapes" from Decoensel e= t al. Applied Acoustics 66 (2005) pp. 175=96194<br> =A0<br>Hope it helps.<br><br>Best regards,<br>Ernesto.<br><br>--<br>Ernesto= Accolti<br>CONICET PhD Fellow at<br>Acoustics and Electroacoustics Laborat= ory<br>National University of Rosario<br>Argentina.<br></div></div><br> --0015175cfa3047654504bc2c21ef--