Aircraft interior noise 1

[ferdo]

Hi,

Does anybody know which is the standard for SIL (Sound Interference Level), in case that such kind of reglementation exists ?

Which are the standards (ICAO or others) who tell something about interior noise level for a commuter aircraft?

Thanks in advance for your info.

Regards
Fernando

 

[GregLocock]

I've never seen a regulatory /standard/ for SIL, but it would make sense. I doubt there are noise limits for the interiors of aircraft.

Obvious questions - which country are you interested in?

Have you looked on the website of the relevant authority?






Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[ferdo]

Hi,

Thanks for the answer.

You are right, I didn't mention which country....I'm interested in an EU standard, but all aviation standards are quite same for EU or America, as far as I know.

I posted the question here because I couldn't find informations over the Internet.

Regards
Fernando

 

[GregLocock]

Is there an ISO standard for SIL? I've only seen a couple of implementations of it, in which case it is unlikely that it would be used to set a standard.

Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[SomptingGuy]

I thought SIL stood for "Speech Interference Level" as coined by either MIRA or ISVR (I forget which, might have been Callow??) in the mid 80's for subjective noise assessment. Whichever, a couple of reasonably good links:

http://www.isvr.co.uk/spe_hear/comint.htm

http://www.sfu.ca/sonic-studio/handbook/Speech_Interference_Level.html

 

[GregLocock]

It's an objective measure. I think we use AI now, for windnoise.





Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[SomptingGuy]

AI: Straight up, no bull (as the AI man said to the cow). Sorry! Worked on developing an AI system a few years ago and the joke rang through my head every day.

 

[SomptingGuy]

Correction...

Subjective noise ESTIMATION based on objective measures.

 

[ferdo]

Hi,

Yes, you are right, its Speech not Sound...so bad that we cannot edit the mistakes in our threads...

Thanks for the links, I found also a MIL-STD but now I'm in a trip and I don't have access to my documents to post the number here.

Thanks again.

Regards
Fernando

 

[ferdo]

Hi,

What I've found is mil-std-1474d.pdf

Regards
Fernando