Topic
Aircraft noise
About: Aircraft noise is a research topic. Over the lifetime, 3051 publications have been published within this topic receiving 32039 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: A survey to investigate the disturbance caused to secondary school teachers by noise is described in this article, where the survey sample was selected on the basis of road traffic noise exposure and it has also been possible to draw conclusions about the disturbance by aircraft noise.
34 citations
TL;DR: In this article, the authors investigated the importance of perceived risk to environmental quality and dispositions to be generally annoyed or sensitive to noise in predicting disturbance from aviation noise by distributing a mail-back questionnaire to 901 residents in neighborhoods bordering a small developing airport.
Abstract: The comparative importance of perceived risk to environmental quality and dispositions to be generally annoyed or sensitive to noise in predicting disturbance from aviation noise was investigated by distributing a mail-back questionnaire to 901 residents in neighborhoods bordering a small developing airport. An Environmental Noise Risk scale, developed by the authors, assessed how individuals appraise the trade-off between economic benefits from airport development and adverse environmental effects. Stepwise multiple regression analysis (N = 358) showed that as hypothesized, disturbance was predicted by assessment of environmental noise risk (β = .60, p < .0001) but not by general annoyance or noise sensitivity. Those disturbed by noise were also more discriminating in their evaluation of other less salient attributes of neighborhoods. Environmental noise risk is discussed as a construct that can contribute to understanding how people evaluate the consequences of a developing noise source.
34 citations
01 Oct 1966
TL;DR: In this paper, an improved method is presented for calculating rotor system overall vortex noise and frequency spectra for stalled and unstalled rotors, which extends the standard steady load method by including the effects of harmonic airloads.
Abstract: : An improved method is presented for calculating rotor system overall vortex noise and frequency spectra for stalled and unstalled rotors. Correlation of measured and predicted vortex noise was evaluated using two rotor systems operating over a wide range of speeds and thrusts. Correlation was found to be excellent. Blade tip planform studies revealed significant vortex noise reductions with tapered tips. A new procedure is also derived for calculating near and far field rotor rotational noise with nonuniform inflow. The method extends the standard steady load method by including the effects of harmonic airloads. Correlation studies were conducted using an H-34 helicopter. Agreement between low frequency measured and predicted noise was good. However, correlation with high harmonic rotational noise was poor. This is probably due to inadequate definition of high harmonic airloads. The study was performed for single rotor systems only, and in its present form is not directly applicable to systems with multiple rotors in juxtaposition.
34 citations
Book•
01 Jan 2006
TL;DR: In this paper, the authors discuss the effects of distance and visibility on the propagation of sound propagation in urban forests, and propose a method to detect the presence of noise in trees.
Abstract: 1 Introduction 2 Noise in Urban Forest 2.1 Sound Propagation 2.1.1 Definition and Theoretical Considerations 2.1.2 Factors Affecting Sound Propagation 2.2 Equipment for Noise Measurement 2.2.1 Instrumentation and Noise Sources 2.2.2 Measurement In Situ 2.2.2.1 Effects of Distance 2.2.2.2 Effect of Frequency 2.2.2.3 Effect of Visibility 2.3 Summary 3 Tree Characteristics and Acoustic Sensors 3.1 Morphological Characteristics 3.2 Mechanical Characteristics 3.2.1 Devices and Instrumentation 3.2.2 Mechanical Characteristics of Standing Trees 3.2.3 Detection of Internal Defects in Standing Trees 3.2.3.1Ultrasonic Velocity Method 3.2.3.2 Stress Wave Method 3.3 Genotypic Characteristics 3.4 Sylvicultural Practices 3.5 Summary 4 Noise Attenuation with Plant Material 4.1 Physical Aspects of Noise Attenuation with Plants 4.2 Ground Attenuation 4.3 Scattering by Trees 4.3.1 Scattering by Stems 4.3.2 Scattering by Canopy and Foliage 4.3.2.1 Measurements in Anechoic Room 4.3.2.2 Measurements in Reverberation Room 4.3.2.3 Outdoor Measurements 4.3.3 Reverberation in a Forest Stand 4.3.4 Atmospheric Conditions 4.4 Sound Scattering by Barriers 4.4.1 Psychological Effects 4.4.2 Solid Barriers without Vegetation 4.4.3 Solid Barriers with Vegetation 4.5 Summary 5 Traffic Noise Abatement 5.1 Road Traffic Noise 5.2 Railway Transportation Noise 5.3 Aircraft Noise 5.4 Summary 6 Noise Abatement and Dwellings 6.1 Urban Area 6.2 Suburban Area 6.3 Summary 7 Noise, Birds and Insects in Urban Forest 7.1 Bird Acoustic Communication in Forest Environment 7.2 Detection of Termite Infestation in Urban Trees 7.3 Summary 8 Acoustics for Fire Control in Forest 9 Economic Aspects Annex 1 Symbols Annex 2 Some Theoretical Considerations Annex 3 Frequency Weighting Annex 4 Standards Annex 5 Units References Subject Index
34 citations
TL;DR: In this article, a noise synthesis technique for aircraft noise is demonstrated by predicting the noise at a noise monitoring location near an airport and comparing the synthesized results to a recorded measurement, an indication on the capability of this technique has been acquired.
34 citations