Vipul Acharya
Structural
I have sound absorption coefficients for a material that was obtained through testing. I have the sound absorption coefficients at various frequencies as well as overall NRC, SAA and αw.
I would like to be able to translate this to a decibel drop. How many decibels will be reduced with this material. I found an equation
d = decibel drop = -20log10(1-C) where C is the (I think) the sound absorption coefficient.
I think I would just use that equation at each frequency to determine the decibel drop to be expected at that frequency?
I could use that equation with the overall NRC, SAA or αw to give an overall general sense of the expected decibel drop?
What about if my sound absorption is 1 (or greater). Would that really mean all the noise at that frequency would be eliminated?
I do understand that it only applies to sound that actually hits the material (which wouldn't be all of the sound).
Thanks in advance.
I would like to be able to translate this to a decibel drop. How many decibels will be reduced with this material. I found an equation
d = decibel drop = -20log10(1-C) where C is the (I think) the sound absorption coefficient.
I think I would just use that equation at each frequency to determine the decibel drop to be expected at that frequency?
I could use that equation with the overall NRC, SAA or αw to give an overall general sense of the expected decibel drop?
What about if my sound absorption is 1 (or greater). Would that really mean all the noise at that frequency would be eliminated?
I do understand that it only applies to sound that actually hits the material (which wouldn't be all of the sound).
Thanks in advance.
