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silencer duct
Posted 3 mai 2013, 09:31 UTC−4 Acoustics & Vibrations Version 4.3a 1 Reply
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Hi
I want to simulate insertion loss for ventilation ducts. I need to define inlet and outlet pressure so i can calculate insertion loss by its difference.
There is a similar sample "perforated muffler" for this situation.
there is a definition for acoustic power
P_in = intop_in(2*p0^2/(2*acpr.rho*acpr.c)) Total acoustic power at the inlet
P_out = intop_out(2*p*conj(p)/(2*acpr.rho*acpr.c)) Total acoustic power, outlet
TL 10*log10(P_in/P_out) Transmission loss
Are these formulas suitable for calculating sound pressure or i need to use anything else?
Regards
I want to simulate insertion loss for ventilation ducts. I need to define inlet and outlet pressure so i can calculate insertion loss by its difference.
There is a similar sample "perforated muffler" for this situation.
there is a definition for acoustic power
P_in = intop_in(2*p0^2/(2*acpr.rho*acpr.c)) Total acoustic power at the inlet
P_out = intop_out(2*p*conj(p)/(2*acpr.rho*acpr.c)) Total acoustic power, outlet
TL 10*log10(P_in/P_out) Transmission loss
Are these formulas suitable for calculating sound pressure or i need to use anything else?
Regards
1 Reply Last Post 20 mai 2013, 03:21 UTC−4
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Posted:
1 decade ago
There is also a model called "Absorptive Muffler" that employs the same solution, it works fine as far as I know.
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Hope this helps
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/RVN
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Hope this helps
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/RVN