Author: James T. HowlettPublisher:
ISBN:
Category :
Languages : en
Pages : 6
Book Description
Measurement, Analysis, and Prediction of Aircraft Interior Noise
Author: James T. HowlettEvaluation of Analysis Techniques for Low Frequency Interior Noise and Vibration of Commercial Aircraft
Author: A. E. LandmannPublisher:
ISBN:
Category : Aircraft cabins
Languages : en
Pages : 82
Book Description
Interior Noise Prediction Methodology: ATDAC Theory and Validation
Author: Potential Subjective Effectiveness of Active Interior Noise Control in Propeller Airplanes
Author: Clemans A. PowellPublisher:
ISBN:
Category : Acoustical engineering
Languages : en
Pages : 40
Book Description
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.
Fourth Aircraft Interior Noise Workshop
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 340
Book Description
The fourth in a series of NASA/SAE Interior Noise Workshops was held on May 19 and 20, 1992 at the Graf Zeppelin Haus in Friedrichshafen, Germany. The theme of the workshop was new technology and applications for aircraft interior noise with emphasis on source noise prediction; cabin noise control, including active and passive methods; and cabin interior noise test procedures. This report is a compilation of the presentations made at the meeting which addressed the above issues.
Prediction of Light Aircraft Interior Noise
Author: James T. HowlettPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 48
Book Description
Aircraft Noise
Author: Oleksandr ZaporozhetsPublisher: CRC Press
ISBN: 0203888820
Category : Technology & Engineering
Languages : en
Pages : 432
Book Description
Aircraft noise has adverse impacts on passengers, airport staff and people living near airports, it thus limits the capacity of regional and international airports throughout the world. Reducing perceived noise of aircraft involves reduction of noise at source, along the propagation path and at the receiver. Effective noise control demands highly s
Structural-acoustic Interaction Modeling and Analysis for Aircraft Interior Noise Prediction
Author: Jianyong LiAnalytical Prediction of the Interior Noise for Cylindrical Models of Aircraft Fuselages for Prescribed Exterior Noise Fields. Phase 1: Development and Validation of Preliminary Analytical Models
Author: Interior Noise Control Ground Test Studies for Advanced Turboprop Aircraft Applications
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781723183973
Category :
Languages : en
Pages : 148
Book Description
The measurement and analysis procedures are documented, and the results of interior noise control ground tests conducted on a DC-9 aircraft test section are summarized. The objectives of these tests were to study the fuselage response characteristics of treated and untreated aircraft with aft-mount advanced turboprop engines and to analyze the effectiveness of selected noise control treatments in reducing passenger cabin noise on these aircraft. The results of fuselage structural mode surveys, cabin cavity surveys and sound intensity surveys are presented. The performance of various structural and cabin sidewall treatments is assessed, based on measurements of the resulting interior noise levels under simulated advanced turboprop excitation. Simpson, Myles A. and Cannon, Mark R. and Burge, Paul L. and Boyd, Robert P. Unspecified Center AIRCRAFT COMPARTMENTS; DC 9 AIRCRAFT; NOISE PREDICTION (AIRCRAFT); NOISE REDUCTION; NOISE TOLERANCE; SOUND TRANSMISSION; TURBOPROP AIRCRAFT; ACOUSTICS; FULL SCALE TESTS; FUSELAGES; GROUND TESTS; NOISE INTENSITY...