Aircraft Noise Reduction Technology and Airport Noise Analysis for General Aviation Revitalization

2015 ◽  
Author(s):  
Sanggyu Min ◽  
Dongwook Lim ◽  
Dimitri N. Mavris
Keyword(s):  
Noise Reduction ◽  
Noise Analysis ◽  
Aircraft Noise ◽  
General Aviation

Aircraft noise reduction technologies: A bibliographic review

2008 ◽  
Vol 12 (1) ◽  
pp. 1-17 ◽  
Author(s):  
D. Casalino ◽  
F. Diozzi ◽  
R. Sannino ◽  
A. Paonessa
Keyword(s):  
Noise Reduction ◽  
Aircraft Noise

Measurement of Noise on the Ground from Aircraft in Flight

1954 ◽  
Vol 58 (520) ◽  
pp. 245-248
Author(s):  
N. Fleming
Keyword(s):  
Noise Reduction ◽  
Noise Analysis ◽  
Single Figure

In cases of noise nuisance, measurement of the noise has several uses. It helps in deciding the degree of noise reduction which is desirable; it may serve to identify the most important source or sources of the noise where this is in doubt; and it is of assistance in devising methods for reduction of the noise. For the first purpose a single figure to characterise the noise would be preferable, but for the others some form of noise analysis is needed.To the sufferer from the noise the most important characteristic is the annoyance it causes, or its nuisance value. This may be assessed very differently by different individuals, and consequently it is not very amenable to measurement.

Research on the Noise Reduction and Efficiency Increase for Axial Fan with Wave Leading Edge Blades

2020 ◽  
Author(s):  
Bo Li ◽  
Yujing Wu ◽  
Dange Guo ◽  
Dan Luo ◽  
Diangui HUANG
Keyword(s):  
Noise Reduction ◽  
Sound Pressure Level ◽  
Wave Amplitude ◽  
Sound Pressure ◽  
Noise Analysis ◽  
Leading Edge ◽  
Pressure Level ◽  
Wave Number ◽  
Monitoring Point ◽  
Reduction Effect

Abstract This paper imitates the raised structure of the leading edge of the humpback whale fin limbs, designed six bionic blades. The aerodynamic analysis show that: the wave leading edge blade can improve the total pressure efficiency of the axial flow fan, and under off-design conditions, the aerodynamic performance of bionic fan is better than that of prototype fan. The noise analysis shows that: under the condition of constant wave number, increasing wave amplitude can reduce the overall sound pressure level at the monitoring point, in the middle and high frequency range, the sound pressure level of the bionic fan at the monitoring point is significantly lower than that of the prototype fan, and the noise reduction effect increases with the increase of wave amplitude; under the condition of constant wave amplitude, increasing the wave number can reduce the fan noise. At a certain wave number and amplitude, the overall sound pressure level of the bionic fan at the monitoring point is at most 2.91 dB lower than that of the prototype fan. In this paper, the noise reduction effect of increasing wave number is more obvious than that of increasing wave amplitude.

Noise analysis and noise reduction methods in kilohertz pump-probe experiments

2007 ◽  
Vol 78 (7) ◽  
pp. 073101 ◽  
Author(s):  
Kevin E. H. Anderson ◽  
Samuel L. Sewall ◽  
Ryan R. Cooney ◽  
Patanjali Kambhampati
Keyword(s):  
Noise Reduction ◽  
Noise Analysis ◽  
Pump Probe ◽  
Reduction Methods
Sign in / Sign up

Export Citation Format

Share Document