Dear Khun Ploy,
Happy New Year 2015 and best wishes, health and success!
Thank you for your reply regarding the noise calculation. However, it is too general and our customer needs specific calculation based on our/your product. Below is a SAMPLE of previous project’s noise calculation. Can you issue similar based on our noise data and your panel specification?
Note that P1 position is 1 meter from noise barrier. In our case, entire compressor skid is inside enclosure (pic below is only partially enclosed).