The panel is optimized in term of {HEAD ~ space requirement} and weight for {TAIL ~ use} in aircraft and has improved sound absorption properties 
The panel is optimized in term of { HEAD ~ space requirement } and weight for { TAIL ~ use } in aircraft and has improved sound absorption properties
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH