This presentation reviews engine noise research conducted at the NASA Glenn Research Center over the past 70 years. This report includes a historical perspective of the Center and the facilities used to conduct the research. Major noise research programs are highlighted to show their impact on industry and on the development of aircraft noise reduction technology. Noise reduction trends are discussed, and future aircraft concepts are presented. Since the 1960s, research results show that the average perceived noise level has been reduced by about 20 decibels (dB). Studies also show that, depending on the size of the airport, the aircraft fleet mix, and the actual growth in air travel, another 15 to 17 dB reduction will be required to achiev...
Results of recent NASA research to reduce aircraft turbofan noise are described. As the bypass ratio...
The objectives of the study are to: (1) conduct a program to determine the community noise impact of...
This report presents a detailed evaluation of the aircraft noise reduction technology concepts devel...
This report reviews all engine noise research conducted at the NASA Glenn Research Center over the p...
The presentation will begin with a brief introduction to the NASA Glenn Research Center as well as a...
Major airports in the world's air transportation systems face a serious problem in providing greater...
Efforts to develop an engine noise reduction technology suitable for use on subsonic and conventiona...
The presentation highlights NASA's jet noise research for 2016. Jet-noise modeling efforts, jet-surf...
This final report has been prepared by Honeywell Aerospace, Phoenix, Arizona, a unit of Honeywell In...
The Aircraft Noise Reduction (ANR) sub-project is focused on the generation, development, and testin...
An overview of the acoustics research at NASA under the Subsonic Fixed Wing project is given. The pr...
A comprehensive aeroacoustic research program called the Source Diagnostic Test was recently conclud...
Conference on NASA research in noise reduction of subsonic jet aircraft - nacelle acoustic linings, ...
Contributions from the combustor to the overall propulsion noise of civilian transport aircraft are ...
This report is a review of the literature regarding propeller airplane far-field noise reduction. Ne...
Results of recent NASA research to reduce aircraft turbofan noise are described. As the bypass ratio...
The objectives of the study are to: (1) conduct a program to determine the community noise impact of...
This report presents a detailed evaluation of the aircraft noise reduction technology concepts devel...
This report reviews all engine noise research conducted at the NASA Glenn Research Center over the p...
The presentation will begin with a brief introduction to the NASA Glenn Research Center as well as a...
Major airports in the world's air transportation systems face a serious problem in providing greater...
Efforts to develop an engine noise reduction technology suitable for use on subsonic and conventiona...
The presentation highlights NASA's jet noise research for 2016. Jet-noise modeling efforts, jet-surf...
This final report has been prepared by Honeywell Aerospace, Phoenix, Arizona, a unit of Honeywell In...
The Aircraft Noise Reduction (ANR) sub-project is focused on the generation, development, and testin...
An overview of the acoustics research at NASA under the Subsonic Fixed Wing project is given. The pr...
A comprehensive aeroacoustic research program called the Source Diagnostic Test was recently conclud...
Conference on NASA research in noise reduction of subsonic jet aircraft - nacelle acoustic linings, ...
Contributions from the combustor to the overall propulsion noise of civilian transport aircraft are ...
This report is a review of the literature regarding propeller airplane far-field noise reduction. Ne...
Results of recent NASA research to reduce aircraft turbofan noise are described. As the bypass ratio...
The objectives of the study are to: (1) conduct a program to determine the community noise impact of...
This report presents a detailed evaluation of the aircraft noise reduction technology concepts devel...