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Does anyone have a good resource for determining audibility loss (dB loss) through various door types? I recall seeing a reference chart that was perhaps printed in a fire alarm handbook in the 90's, but I don't have a copy.
Intelligibility is a world all on it's own - if we need intelligibility I typically locate a speaker on the opposite side of closed doors (private offices, for instance). Is there a way I can model or predict intelligibility through closed doors? I've tried Ease EVAC years ago using door gaps, but it wasn't well suited to model the losses at that time. Posted anonymously by a member for discussion. Discuss this | Submit a Question | Subscribe
4 Comments
Mike R
4/9/2019 10:24:10 am
SFPE handbook of fire protection engineering 5th edition volume II - "Designing fire alarm audibility" which starts on page 1359. Table 40.25 will probably give you the information you need.
PETE
4/9/2019 03:12:58 pm
I have the 4th Edition SFPE Handbook. It's in Section 4.1 You can find the indicies here: https://books.google.com/books?id=xP2zCgAAQBAJ&pg=PA1364&lpg=PA1364&dq=average+sound+reduction+through+doors+index+100-3150+hz&source=bl&ots=1-0hE0BGTn&sig=ACfU3U10araDfNxMw3G7D_O2zQfAci5qDg&hl=en&sa=X&ved=2ahUKEwijjKz96MPhAhXXqYMKHZ37A5AQ6AEwAHoECAkQAQ#v=onepage&q=average%20sound%20reduction%20through%20doors%20index%20100-3150%20hz&f=false
Society of Fire Protection Engineers (SFPE) Handbook of Fire Protection Engineering, 5th Edition methodology for designing fire alarm audibility has the following tables:
Mike
4/9/2019 09:04:45 pm
Don't forget safety factors. I've seen design-build contractors adding devices after in field measurements Leave a Reply. |
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