SCIENCE|natural and applied sciences|earth sciences · PRODUCTION, TECHNOLOGY AND RESEARCH|technology and technical regulations
- rátáil torainn ilchodach Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- composite noise rating
- en
- Definition a measure for aircraft noise which uses perceived noise level(PNL)with appropriate corrections for frequency of operations,time of day and seasons of the year Reference Multilingual Aeronautical Dictionary(AGARD,1980)