I need standard

[evolutionb]

Hello every one;

I really need this norm: ISO 9613-1,

This to estimate the atmospheric absorption coefficient.

Thanks a lot

[evolutionb]

No reply??

[DORIO]

Simplified procedure for computing the absorption of sound

[DORIO]

Iso 9613-2 international standard

[evolutionb]

Thank you so much for your help, DORIO;
for large octave band I have got negative values (environmental attenuation impact), I don't know why is that??

Thanks

[micu]

I need ISO 9613-2 Please help me

[f81aa]

Hi Micu:

Help is on the way, (I hope).

I have uploaded what I have, ISO 9613-2 (1st. edition, 1996). This I downloaded from this Forum, so credits to the original uploader who I can not recall.

Please go to the link

[link Point to another website Only the registered members can access]
I hope it will be useful to you and others.

Regards