Developing a data based method to quantify the effects of flight track, aircraft weight and engine setting on the received aircraft noise levels

نویسنده

  • S. de Blok
چکیده

To provide continuous growth of Amsterdam Airport Schiphol (AAS), the department Stakeholder Strategy and Development (SSD) of Amsterdam Airport Schiphol (AAS) introduces Noise Abatement Measures to create quieter aircraft operations and hence to be able to fly more frequent within the current environmental law related to aircraft noise. However, SSD faces difficulties with the evaluation regarding whether or not an implemented Noise Abatement Measure (NAM) really contributes to a quieter aircraft operation. To evaluate this, often the maximum loudness level Lmax in decibels is considered. Lmax is the maximum sound level during a measurement period or a noise event. Nevertheless, Lmax of aircraft noise is influenced by many factors, for example: flap setting, engine setting, meteorological conditions and landing gear-up/landing gear-down. Therefore, SSD found that it is very difficult to determine the specific contribution of a NAM to the aircraft noise level Lmax. Hence, AAS demands a technique in improving the distinctive capabilities between noise measurements. Much information is encapsulated in a noise measurement. Not only are the noise measurements of the Noise Monitoring System (NOMOS) influenced by, for example, aircraft type, configuration and engine setting, but also practical influences as, for example, additional instructions by Air Traffic Control (ATC) to a pilot or departures with de-rated thrust to save fuel influence the noise measurements as conducted by NOMOS significantly. The goal of this research is to determine the contribution of the implemented NAM to the measured noise level, as to be able to investigate if an implemented NAM contributes to a decrease in exposed noise level. Besides the ability to quantitatively determine the specific contribution of a NAM to the measured noise level, this research could also be of interest to other industries. For example, the effect of changes in the design of an aircraft to the emitted noise level can be studied by aircraft builders but also this study can be used for law enforcement purposes, as to monitor airports whether or not they comply with the noise restrictions, while this is done now a days by means of theoretical models and not by means of actual noise measurements. The purpose of the research presented in this report is the determine/estimate two additional aircraft parameters/characteristics and to add this information to the original scattered dataset.

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تاریخ انتشار 2015