Noise levels from low flying military jet aircraft in the UK are controlled by restrictions placed upon the height and speed at which particular types of aircraft are allowed to fly. This ensures that, on the ground, disturbance and annoyance are minimised and noise levels are kept below those...
An active noise cancellation (ANC) device decreased averaged noise exposure (LAeq8min) 4–8 dB over the noise attenuation of the same helmets when the ANC system was off. The noise of overflights by military jets were measured and the noise levels were lower than those known to cause the ...
The Effects of Aircraft Noise on the Auditory Language Processing Abilities of English First Language Primary School Learners in Durban, South Africa Schools located near to airports are exposed to high levels of noise which can cause cognitive, health, and hearing problems. Therefore, this study so...
Keywords,aircraftnoise,noisesi(ulation),irelessco,,unication 军用飞机噪声对人员和设备的正常工作产生影响,会造成空勤和地勤人员的注意力分散,精神紧张和烦躁,严重的还会造成听力损伤等.某些大声压级的低频噪声还可能使人产生恶心、头晕等反应,与仪器设备产生的耦合振动还可能产生一些不可预料的后果(1)2,. ...
Findings indicated that regardless of which reason attributed to the sound, amplified helicopter noise resulted in lower evaluations of the park setting and greater levels of annoyance, suggesting that park management-related noise disturbances are just as annoying as other aircraft noise sources. This ...
Roshel's mil-spec Senator Armoured Vehicle features high levels of ballistic protection and integrated CBRN. 10 October 2018 Read >> Major Step Towards Purchase of Boxer Taken by UK Defence Minister The UK Defence Minister gives Boxer consortium, Artec, the green light to ramp up the selection ...
Spectral Characterization in the Near- and Mid-field of Military Jet Aircraft Noise Spatial dependence of levels and spectral characteristics of the near-field noise spectra from the afterburning F-22A Raptor and their transition toward far-field behavior are described. It is shown that the measured...
Investigation of Correlation between Aircraft Interior Noise Levels and Residential Building Construction Details Our paper investigates the correlation between aircraft interior noise levels and various residential building construction features. Variables considered ... JE Cox,E Reindel - Conference on Nationa...
for needle use by fitness-focused athletes is steroids, but this is not likely in a SEAL candidate due to aggressive and effective oversight and lack of perceived benefit. A possibility might be vitamin B-12 which is commonly given by doctors to patients by injection for low B-12 levels. ...
It has happened that very closely spaced rebars have been mistaken for a stratigraphic layer change, e.g., the boundary between the upper levels of asphalt and the underlying concrete. Unless the antenna frequency is high enough for the radar to distinguish each rebar from its neighbors on ...