Re: Image-source model with consideration of air absorption

[Emmanuel Vincent <emmanuel.vincent@xxxxxxxx>]

The URL http://www.irisa.fr/metiss/members/evincent/Roomsimove.zip is 
correct.

I don't know about the Green function but you can read it from the code.

Emmanuel


On 11/22/2011 11:57 AM, Junfeng Li wrote:
> Dear Emmanuel,
>
> Thanks a lot for your information.
> I found that Roomsim (http://media.uws.ac.uk/~campbell/Roomsim/) implemented this function. your Roomsimove cannot be found from the URL that you provided below. Could you check it again?
>
> My another concern is what the Green function ï exp(jwd/(4*pi*d) ï in the free field should be when it is extended when considering the air absorption effect?
>
> Do you have any idea? or references on this issue?
> ïThough I believe it is a very easy question, I cannot find the answer, ....)
>
> Thanks a lot again.
>
> Cheers,
>
> Junfeng
>
>
>
> On 11/11/22, Emmanuel Vincent<emmanuel.vincent@xxxxxxxx>  wrote:
>
> > Dear Junfeng,
> >
> > Roomsim (http://media.uws.ac.uk/~campbell/Roomsim/) as well as our command-line software Roomsimove (for moving sources)(http://www.irisa.fr/metiss/members/evincent/Roomsimove.zip) account for this.
> >
> > Emmanuel
> >
> > --
> > Emmanuel Vincent
> > METISS Project-Team
> > INRIA Rennes - Bretagne Atlantique
> > Campus de Beaulieu, 35042 Rennes cedex, France
> > Phone: +332 9984 2269 - Fax: +332 9984 7171
> > Web: http://www.irisa.fr/metiss/members/evincent/
> >
> >
> > On 11/22/2011 11:28 AM, Junfeng Li wrote:
> > > Dear list,
> > >
> > > I am now considering to generate room impulse response (RIR) using the well-known image-source method. However, I found that the traditional image-source method only considered the absorption of enclosure surfaces, without the consideration of air absorption. However, the air absorption should be also an important factor which affect the simulated RIR.
> > >
> > > To reformulate the image-source method, the Green function ï exp(jwd/(4*pi*d) ï in the free field should be extended to that with the consideration of air absorption effect. I searched this problem for some days. However, I did not find any reference.
> > >
> > > Could anyone point some references on this issue or the (source code of) improved image-source method that implemented this idea?
> > >
> > > Thank you so much in advance.
> > >
> > > Best regards,
> > > Junfeng


--
Emmanuel Vincent
METISS Project-Team
INRIA Rennes - Bretagne Atlantique
Campus de Beaulieu, 35042 Rennes cedex, France
Phone: +332 9984 2269 - Fax: +332 9984 7171
Web: http://www.irisa.fr/metiss/members/evincent/