AFMG Network
Forums for AFMG Software
AFMG Network Forum Index -> EASE - Discussion -> Noise and Signal Masking for STIPA calculation
Post new topic  Reply to topic View previous topic :: View next topic 
Noise and Signal Masking for STIPA calculation
PostPosted: Fri Mar 10, 2017 11:35 pm Reply with quote
hasia
Member
 
Joined: 26 Jan 2017
Posts: 9




When should I consider Signal Masking in the calculation option? What the difference between Noise and Signal Masking for STIPA calculation?

Thanks.
View user's profile Send private message
PostPosted: Sat Mar 11, 2017 11:41 pm Reply with quote
Lindsay S
Member
 
Joined: 28 Jun 2013
Posts: 15




Noise is the ambient level of the space that you are evaluating. This is crucial; without an accurate level your results will probably be completely meaningless. In other words, the higher the ambient noise level of a space is, the lower you STI rating. You should enter in the frequency characteristics of the ambient noise level if you have it, otherwise enter the overall anticipated or measured level.

Noise masking has to do with how the ear processes sound in a non-linear fashion. The short answer is that this is typically mainly significant for very high sound levels. If you search for Steeneken, you can find more information on this.

I always leave both of these checked. One of my annoyances is that I haven't found a way to make these set as "on" by default. If you are looking at the STI mapping and go to preference to turn these on, it will recalculate the map each time you check one of the boxes which can take minutes. When I'm evaluating STIPA I set these in preferences while I'm still looking at coverage patterns.

Lindsay Smith
Seattle
View user's profile Send private message
PostPosted: Sun Mar 12, 2017 5:34 am Reply with quote
hasia
Member
 
Joined: 26 Jan 2017
Posts: 9




Hi Lindasay,
Thank you very much for your reply.

I am working for PA system in large station glass box. It assumes 80dbA ambient level, ie approximately 75db/octave. SPL goes around 85-90 dba, which is subject to continuous level dependent auditory masking as per IEC60268-16. Doesn't EASE consider that by default?
I thought this Sound_masking, as-
https://en.wikipedia.org/wiki/Sound_masking
Do you have any insight about that!!!
===============
I am also confused about calculation RT. I used AURA. According to the tutorial, EDT, T10, T20, T30 in AURA represents RT. But for my project, they vary by upto 1-2 Sec. Which value should I consider as RT?

Thanks again.
View user's profile Send private message
Noise and Signal Masking for STIPA calculation
AFMG Network Forum Index -> EASE - Discussion
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
All times are GMT  
Page 1 of 1  

  
  
 Post new topic  Reply to topic  


Powered by phpBB © 2001-2003 phpBB Group
Theme created by Vjacheslav Trushkin
Variation by CodeWeavers