Annoyance Response To Simulated Advanced Turboprop Aircraft Interior Noise Containing Tonal Beats PDF Download
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Author | : Jack D. Leatherwood |
Publisher | : |
Total Pages | : 32 |
Release | : 1987 |
Genre | : |
ISBN | : |
Download Annoyance Response to Simulated Advanced Turboprop Aircraft Interior Noise Containing Tonal Beats Book in PDF, ePub and Kindle
Author | : Jack D. Leatherwood |
Publisher | : |
Total Pages | : 32 |
Release | : 1987 |
Genre | : Aircraft cabins |
ISBN | : |
Download Annoyance Response to Simulated Advanced Turboprop Aircraft Interior Noise Containing Tonal Beats Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 34 |
Release | : 1987 |
Genre | : Science |
ISBN | : |
Download NASA Technical Paper Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 920 |
Release | : 1987 |
Genre | : Aeronautics |
ISBN | : |
Download Scientific and Technical Aerospace Reports Book in PDF, ePub and Kindle
Author | : Clemans A. Powell |
Publisher | : |
Total Pages | : 40 |
Release | : 2000 |
Genre | : Acoustical engineering |
ISBN | : |
Download Potential Subjective Effectiveness of Active Interior Noise Control in Propeller Airplanes Book in PDF, ePub and Kindle
Active noise control technology offers the potential for weight-efficient interior noise reduction, particularly for propeller aircraft. However, there is little information on how passengers respond to this type of interior noise control. This paper presents results of two experiments that use sound quality engineering practices to determine the subjective effectiveness of hypothetical active noise control (ANC) systems in a range of propeller aircraft. The two experiments differed by the type of judgments made by the subjects: pair comparisons based on preference in the first and numerical category scaling of noisiness in the second. Although the results of the two experiments were in general agreement that the hypothetical active control measures improved the interior noise environments, the pair comparison method appears to be more sensitive to subtle changes in the characteristics of the sounds which are related to passenger preference. The reductions in subjective response due to the ANC conditions were predicted with reasonable accuracy by reductions in measured loudness level. Inclusion of corrections for the sound quality characteristics of tonality and fluctuation strength in multiple regression models improved the prediction of the ANC effects.
Author | : David A. MacCurdy |
Publisher | : |
Total Pages | : 92 |
Release | : 1990 |
Genre | : |
ISBN | : |
Download Annoyance Caused by Advanced Turboprop Aircraft Flyover Noise: Counter-rotating-propeller Configuration Book in PDF, ePub and Kindle
Author | : National Aeronautics and Space Adm Nasa |
Publisher | : Independently Published |
Total Pages | : 78 |
Release | : 2018-11-02 |
Genre | : Science |
ISBN | : 9781730782893 |
Download Annoyance Caused by Advanced Turboprop Aircraft Flyover Noise: Comparison of Different Propeller Configurations Book in PDF, ePub and Kindle
A laboratory experiment was conducted to compare the annoyance of flyover noise from advanced turboprop aircraft having different propeller configurations with the annoyance of conventional turboprop and turbofan aircraft flyover noise. A computer synthesis system was used to generate 40 realistic, time varying simulations of advanced turboprop takeoff noise. Of the 40 noises, single-rotating propeller configurations (8) and counter-rotating propeller configurations with an equal (12) and unequal (20) number of blades on each rotor were represented. Analyses found that advanced turboprops with single-rotating propellers were, on average, slightly less annoying than the other aircraft. Fundamental frequency and tone-to-broadband noise ratio affected annoyance response to advanced turboprops, but the effects varied with propeller configuration and noise metric. The addition of duration corrections and corrections for tones above 500 Hz to the noise measurement procedures improved annoyance prediction ability. Mccurdy, David A. Langley Research Center...
Author | : |
Publisher | : |
Total Pages | : 38 |
Release | : 1988 |
Genre | : |
ISBN | : |
Download Advanced Turboprop Aircraft Flyover Noise: Annoyance to Counter-rotating-propeller Configurations with a Different Number of Blades on Each Rotor: Preliminary Results Book in PDF, ePub and Kindle
Author | : National Aeronautics and Space Administration (NASA) |
Publisher | : Createspace Independent Publishing Platform |
Total Pages | : 76 |
Release | : 2018-07-06 |
Genre | : |
ISBN | : 9781722239176 |
Download Annoyance Caused by Advanced Turboprop Aircraft Flyover Noise Book in PDF, ePub and Kindle
A laboratory experiment was conducted to compare the annoyance of flyover noise from advanced turboprop aircraft having different propeller configurations with the annoyance of conventional turboprop and turbofan aircraft flyover noise. A computer synthesis system was used to generate 40 realistic, time varying simulations of advanced turboprop takeoff noise. Of the 40 noises, single-rotating propeller configurations (8) and counter-rotating propeller configurations with an equal (12) and unequal (20) number of blades on each rotor were represented. Analyses found that advanced turboprops with single-rotating propellers were, on average, slightly less annoying than the other aircraft. Fundamental frequency and tone-to-broadband noise ratio affected annoyance response to advanced turboprops, but the effects varied with propeller configuration and noise metric. The addition of duration corrections and corrections for tones above 500 Hz to the noise measurement procedures improved annoyance prediction ability. Mccurdy, David A. Langley Research Center...
Author | : David A. McCurdy |
Publisher | : |
Total Pages | : 92 |
Release | : 1990 |
Genre | : Airplanes |
ISBN | : |
Download Annoyance Caused by Advanced Turboprop Aircraft Flyover Noise Book in PDF, ePub and Kindle