Combustion noise from gas turbine aircraft engines measurement of far-field levels [PDF]
Combustion noise can be a significant contributor to total aircraft noise. Measurement of combustion noise is made difficult by the fact that both jet noise and combustion noise exhibit broadband spectra and peak in the same frequency range.
Krejsa, Eugene A.
core +1 more source
Reduction of fan noise: A concept [PDF]
, 1972 Acoustic materials strategically located within or near noise sources are effective for noise abatement on wing mounted lift fans, nozzles, engines and other noise sources. Panels are straightforward and easily adaptable to situations outside of aircraft
Simonson, M. R.
core +1 more source
Estimating red deer Cervus elaphus population density using drones in a steep and rugged terrain
Wildlife Biology, EarlyView.Precise and accurate information about population density, crucial for wildlife management, is difficult to obtain for elusive species living in dense forests or steep and inaccessible terrain. Using unmanned aerial vehicles (UAVs), we developed a method for obtaining absolute population estimates of ungulates living in steep, rugged, and partly ...
Julie Bommerlund +3 more
wiley +1 more source
Predicting the audibility and annoyance of unducted fan engines [PDF]
Predictions of the prevalence of annoyance associated with aircraft noise exposure are heavily influenced by field studies conducted in urban airport neighborhoods.
Fidell, Sanford +2 more
core +1 more source
Experimental assessment of large mammal population estimates from airborne thermal videography
Wildlife Biology, EarlyView.Wildlife resource management requires reliable, fast, and affordable methods of surveying wildlife populations to develop and adaptively adjust policies. Thermal video from drones can yield high rates of detection over large areas with relative speed and safety.
Julia S. McElhinny +7 more
wiley +1 more source
An Investigation of Bifurcation Acoustic Treatment Effects on Aft-Fan Engine Nacelle Noise [PDF]
Increasing air traffic and more stringent aircraft noise regulations continue to expand requirements on aircraft noise reduction capabilities for conventional and unconventional aircraft configurations.
Jones, Michael G., Nark, Douglas M.
core +1 more source
Long-term aircraft noise exposure and risk of hypertension in postmenopausal women. [PDF]
Environ Res, 2023 Nguyen DD +12 more
europepmc +1 more source
Wildlife Society Bulletin, EarlyView.We used drone‐based radiotelemetry and multispectral imagery to estimate detection and survival probabilities of blue‐winged teal broods in Saskatchewan, Canada. Weekly brood survival probabilities, estimated via Cormack‐Jolly‐Seber models, increased with age and were comparable between drone methods.
Grant A. Rhodes +5 more
wiley +1 more source
Refan program. Phase 1: Summary report [PDF]
The Refan Program is aimed at a large reduction in aircraft approach and takeoff noise in the vicinity of airports caused by the JT3D-powered 707's and DC-8's and the JT8D-powered 727's, 737's and DC-9's.
Bresnahan, D. L., Sams, E. W.
core +1 more source
Associations between long-term aircraft noise exposure, cardiovascular disease, and mortality in US cohorts of female nurses. [PDF]
Environ Epidemiol, 2023 Grady ST +14 more
europepmc +1 more source