Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 54
Book Description
Interior Noise Prediction Methodology: ATDAC Theory and Validation
Author: Interior Noise Prediction Methodology
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781722316792
Category :
Languages : en
Pages : 50
Book Description
The Acoustical Theory for Design of Aircraft Cabins (ATDAC) is a computer program developed to predict interior noise levels inside aircraft and to evaluate the effects of different aircraft configurations on the aircraft acoustical environment. The primary motivation for development of this program is the special interior noise problems associated with advanced turboprop (ATP) aircraft where there is a tonal, low frequency noise problem. Prediction of interior noise levels requires knowledge of the energy sources, the transmission paths, and the relationship between the energy variable and the sound pressure level. The energy sources include engine noise, both airborne and structure-borne; turbulent boundary layer noise; and interior noise sources such as air conditioner noise and auxiliary power unit noise. Since propeller and engine noise prediction programs are widely available, they are not included in ATDAC. Airborne engine noise from any prediction or measurement may be input to this program. This report describes the theory and equations implemented in the ATDAC program. Mathur, Gopal P. and Gardner, Bryce K. Unspecified Center NAS1-18037; RTOP 535-03-11-03...
Prediction of Light Aircraft Interior Noise
Author: James T. HowlettPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 48
Book Description
Validation of an Interior Noise Prediction Model for a Composite Cylinder
Author: T.B. BeyerThe MDE Method for Aircraft Cabin Interior Noise Prediction
Author: P. H. DenkePublisher:
ISBN:
Category : Aircraft cabins
Languages : en
Pages : 11
Book Description
Highway Noise
Author: B. Andrew KuglerPublisher: Transportation Research Board National Research
ISBN:
Category : Science
Languages : en
Pages : 850
Book Description
A description of motor vehicle noise sources and the potential for their control is provided. The report presents an overview of the suggested noise prediction methodology, which is a four step process that includes approximating noise impacts using a nomograph procedure to determine noise levels associated with given traffic and site characteristics; refining these predictions by more accurate representation of design parameters and use of a computer program that is able to plot as well as calculate noise impact; introducing appropriate noise-control options and evaluate them, using a noise barrier nomograph solution; lastly, selected options are fully evaluated using the computer program.
Structural Acoustic Prediction and Interior Noise Control Technology
Author: Publisher: DIANE Publishing
ISBN: 1428996060
Category :
Languages : en
Pages : 70
Book Description
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 Interior Noise by Statistical Energy Analysis (SEA) Method
Author: Vincent R. MillerPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 136
Book Description
Author: Jianyong Li