Aircraft noise

About: Aircraft noise is a research topic. Over the lifetime, 3051 publications have been published within this topic receiving 32039 citations.

How to measure community tolerance levels for noise.

Abstract: Relationships between noise exposure and transportation noise induced annoyance have been studied extensively for several decades. The annoyance due to aircraft noise exposure is in the present paper assumed to be influenced by the day–night yearly average sound level (DNL). It has long been recognized that the annoyance also depends on non-DNL factors, but this is complicated—resulting in a variety of different modeling strategies. Motivated by this, the community tolerance level (CTL) was introduced in 2011 for a loudness-based psychometric function. It is a single parameter that accounts for the aggregate influence of other factors. This paper suggests and investigates different methods for the measurement of the CTL. The methods are illustrated on data found in the literature, on recent surveys around two Norwegian airports, and on simulated data. The results from the presented methods differ significantly. An elementary method is shown to give a measurement of the CTL with smaller uncertainty, and is recommended as a replacement for the originally suggested least-squares method. Methods for evaluating the measurement uncertainty are also presented.

Relation between aircraft noise reduction in schools and standard- ized test scores

Abstract: Research on the effects of aircraft noise on children’s learning suggests that aircraft noise can interfere with learning in the following school areas: reading, motivation, language and speech acquisition, and memory (Evans et al. 1998). The strongest findings to date are for the school subject of reading, for which the majority of studies have shown that children in noise-impact zones are negatively affected by aircraft. Recent research, which confirms conclusions from the 1970s, shows learning decreases in reading when outdoor-noise LAeq is 65 dB or higher (Stansfeld et al. 2000). It is also possible that, for the same outdoor LAeq, the effects of aircraft noise on classroom learning may be greater than the effects of road and railroad noise (Hygge et al. 2003).

Noise prediction technology for CTOL aircraft

Abstract: The application of a new aircraft noise prediction program to CTOL noise prediction is outlined. Noise prediction is based on semiempirical methods for each of the propulsive system noise sources, such as the fan, the combustor, the turbine, and jet mixing, with noise-critical parameter values derived from the thermodynamic cycle of the engine. Comparisons of measured and predicted noise levels for existing CTOL aircraft indicate an acceptable level of accuracy.

System and method for providing an aircraft noise advisory during departure and arrival of an aircraft

Abstract: A system and method for providing an aircraft noise advisory during departure and/or arrival of an aircraft are disclosed. In one embodiment, predefined allowable aircraft noise level information associated with a plurality of aircraft noise sensors located in the vicinity of airports are obtained. Further, predefined allowable aircraft noise level information associated with one or more of the plurality of aircraft noise sensors is presented on a display device in the aircraft, based on a current location of the aircraft, upon receiving noise data request from a pilot. Furthermore, current aircraft noise level information is obtained from one of the one or more aircraft noise sensors. In addition, the current aircraft noise level information is compared with predefined allowable aircraft noise level information associated with the one of the one or more aircraft noise sensors. Also, the aircraft noise advisory is displayed based on an outcome of the comparison.