A piloted simulation experiment was conducted in the Vertical Motion Simulator to evaluate the handling qualities of noise abatement approach procedures for a civil tiltrotor. Approach and landing procedures flown on the XV-15 tiltrotor research aircraft were evaluated in the simulator by a larger pilot population. The impact on handling qualities of attitude stabilization control responseand w...

BACKGROUND The intensive care unit (ICU) environment exposes patients to noise levels that may result in substantial sleep disruption. There is a need to accurately describe the intensity pattern and source of noise in the ICU in order to develop effective sound abatement strategies. The objectives of this study were to determine nocturnal noise levels and their variability and the related sour...

Evaluation and analysis of noise pollution levels have been carried out to determine the level of noise and its sources in Ilorin metropolis. Noise measurements have been done in the morning, at noon, in the evening, and at night to determine noise pollution all over the city. The selected areas of study are commercial centers, road junctions/busy roads, passenger loading parks, and high-densit...