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: In this article, the effects of the noise level and type of noise source on activity disturbance were investigated by a simulated-environment study and the results indicated that the correlation coefficients between the activity disturbance and noise level were high (r=0·951 and 0·970).
11 citations
••
TL;DR: In this paper, the main fan noise mitigation technologies in turbofan engines are discussed and compared to those of the early jet engine designs, with the reduction in jet speed and its control requiring an immense research effort.
Abstract: Aircraft noise and emissions have been of concern since the beginning of commercial aviation. The continuing growth in air traffic and increasing public awareness have made environmental considerations one of the most critical aspects of commercial aviation today. To deal with this problem, aircraft manufacturers and public establishments are engaged in research on technical and theoretical approaches for noise reduction concepts that should be applied to new aircraft. While jet noise was the dominating contributor in the early jet engine designs, the noise emitted by the fan has become important with the reduction in jet speed and its control requiring an immense research effort. This paper concerns the main fan noise mitigation technologies in turbofan engines.
11 citations
••
05 Jun 2011
TL;DR: In this paper, a research effort has been initiated to develop a toolchain that links each of the relevant components, which allows the use of synthesized sound in a virtual reality simulator and enhances followup annoyance investigations.
Abstract: Aircraft noise annoyance predictions based on traditional tools lack fidelity when modelling a single aircraft flyover. For evaluating annoyance of new procedures, different aircraft types or changing atmospheric conditions, a new modelling approach is necessary. A research effort has been initiated to develop a toolchain that links each of the relevant components. This allows the use of synthesized sound in a virtual reality simulator and enhances follow-up annoyance investigations. The toolchain components and current capabilities are presented in this paper. Audible results are illustrated by spectrograms to show the difference between different atmospheric conditions. Through the development of the toolchain, it becomes possible to demonstrate audible results of changing aircraft procedures, type and atmosphere in a virtual reality environment. This opens new ways to investigate how people value aircraft noise in different atmospheres in combination with smart planning of aircraft procedures.
11 citations
01 Jul 1958
TL;DR: In this paper, Canadian research on flow noise and some aspects of the aircraft noise problem is described and the work was done at the Defence Research Board, the University of Toronto Institute of Aerophysics and A. V. Roe (Canada) Ltd.
Abstract: Canadian research on flow noise and some aspects of the aircraft noise problem is described . The work was done at the Defence Research Board, the University of Toronto Institute of Aerophysics and A. V. Roe (Canada) Ltd. Specific experimental and/ or theoretical investigations include: Aeolian Tones; Boundary Layer Noise (rigid wall and flexible wall); Effects of Boundary Layers and Noise on Aircraft Structures; Distribution of Noise Sources Along a Jet; Ground Run-up Mufflers; Transmission of Sound from, and Acoustic Energy Flow in, a Moving Medium; Sound Generated by Interaction of a Vortex with a Shock Wave .
11 citations
•
17 Mar 2015
TL;DR: In this paper, the authors presented the results of the first Joint DLR & TU Delft Aviation Noise Workshop, where four specific tasks were formulated in order to address the problem, i.e. identification of main aircraft noise sources on board of a given reference vehicle, assessment of simulation capabilities for noise prediction, identification and assessment of promising noise reduction concepts for the reference vehicle and integration of these measures on-board of the reference vessel.
Abstract: In October 2014, the first ”Joint DLR & TU Delft Aviation Noise Workshop” was organized. This publication is the executive summary of this event. Overall, 38 invited
participants from industry, academia, and research institutions have discussed the specific topic of this first 3 day workshop, i.e ”Aircraft Noise Reduction at the Source”.
Four specific tasks were formulated in order to address the problem, i.e. (1) identification of main aircraft noise sources on-board of a given reference vehicle, (2) assessment of simulation capabilities for noise prediction, (3) identification and assessment of promising noise reduction concepts for the reference vehicle, and (4) integration of these measures on-board of the reference vehicle. The major noise sources on-board of the reference
vehicle as identified by the participants could have been reduced significantly if selected measures are installed on-board. These proposed measures promise to reduce the system noise by 8 dB along a take-off and by 10 dB along an approach flight. Yet, the almost 65% reduction in perceived noise as specified by ACARE’s Flight Path 2050 could not be achieved. The most effective measure has been identified as structural shielding of engine noise emission.
11 citations