dzhoucam
Mechanical
- Nov 7, 2002
- 12
Hi,
I have a lot of questions but the following two questions are more urgent to me now.
I want to measure the acoustic properties of an ultralight sandwich material(totally only 1.2mm thick). My current plan is to use the impedance tube and two microphones method(ASTM E1050) to measure the absorption coefficient. But I also find another ASTM standard (C384). Can anybody tell me which method is better or easier to measure the absorption coefficient?
The second question is that I also want to measure the sound transmission loss(TL) of this material. But I find the ASTM standards for sound TL is manily used for building materials and need a large reverberation room. My material is mainly used in the truck industry and I also have not so big space and cost to do the measuremtn as the standard suggests. I wonder whether there are alternatives for the sound TL measurement.
Many Thanks.
I have a lot of questions but the following two questions are more urgent to me now.
I want to measure the acoustic properties of an ultralight sandwich material(totally only 1.2mm thick). My current plan is to use the impedance tube and two microphones method(ASTM E1050) to measure the absorption coefficient. But I also find another ASTM standard (C384). Can anybody tell me which method is better or easier to measure the absorption coefficient?
The second question is that I also want to measure the sound transmission loss(TL) of this material. But I find the ASTM standards for sound TL is manily used for building materials and need a large reverberation room. My material is mainly used in the truck industry and I also have not so big space and cost to do the measuremtn as the standard suggests. I wonder whether there are alternatives for the sound TL measurement.
Many Thanks.
