Your Selections

TEAA21
Show Only

Collections

File Formats

Content Types

Dates

Sectors

Topics

Publishers

Committees

Committee Codes

Determination of Distance from Ground Observer to Aircraft for Acoustic Tests

A-21 Aircraft Noise Measure Noise Aviation Emission Modeling
  • Aerospace Standard
  • AIR902A
  • Current
Published 2017-09-19 by SAE International in United States
This document describes a practical system for a user to determine observer-to-aircraft distances. These observer-to-aircraft distances can be either closest point of approach (CPA) distances during field measurements or overhead distances during acoustic certification tests. The system uses a digital camera to record an image of the subject aircraft. A method of using commercial software to obtain the distance from such an image is presented. Potential issues which may affect accuracy are discussed.
Annotation icon

Method to Calculate Behind Start of Takeoff Roll Noise Level Adjustments

A-21 Aircraft Noise Measure Noise Aviation Emission Modeling
  • Aerospace Standard
  • AIR6297
  • Current
Published 2017-07-06 by SAE International in United States
This document describes a method to calculate noise level adjustments at locations behind an airplane (described by an angular offset or directivity) at the start of takeoff roll (SOTR). This method is derived from empirical data from jet aircraft (circa 2004), most of which are configured with wing-mounted engines with high by-pass ratios (Lau, et al., 2012). Methods are also described which apply to modern turboprop aricraft. Calculations of other propagation-related adjustments required for aircraft noise prediction models are described in AIR1845A, ARP5534, ARP866A, and AIR5662.
Datasets icon
Annotation icon

Application of Pure-Tone Atmospheric Absorption Losses to One-Third Octave-Band Data

A-21 Aircraft Noise Measure Noise Aviation Emission Modeling
  • Aerospace Standard
  • ARP5534
  • Current
Published 2013-08-10 by SAE International in United States
This document presents a practical method for calculating atmospheric absorption for wide-band sounds analyzed with one-third octave-band filters, called the SAE Method. The SAE Method utilizes pure-tone attenuation algorithms originally published in ISO 9613-1 and ANSI S1.26-1995 to calculate path-length attenuation at mid-band frequencies. The equations introduced in this standard transform the pure-tone, mid-band attenuation to one-third octave-band attenuation. The purpose of this guidance document is to extend the useful attenuation range of the Approximate Method outlined in ANSI S1.26-1995, and to replace ARP866A. Calculation of sound attenuation caused by mechanisms other than atmospheric absorption such as divergence, refraction, scattering due to turbulence, ground reflections, or non-linear propagation effects, is outside the scope of this document.
Datasets icon
Annotation icon

Gas Turbine Jet Exhaust Noise Prediction

A-21 Aircraft Noise Measure Noise Aviation Emission Modeling
  • Aerospace Standard
  • ARP876F
  • Current
Published 2013-05-16 by SAE International in United States
ARP876 is intended to provide specific recommended procedures for the prediction of gas turbine jet exhaust system noise sources. Procedures are issued as separate sections, to allow for future updating as additional methods, consistent with state-of-the-art, become available.
Datasets icon
Annotation icon

Measurement of Exterior Noise Produced by Aircraft Auxiliary Power Units (APUs) and Associated Aircraft Systems During Ground Operation

A-21 Aircraft Noise Measure Noise Aviation Emission Modeling
  • Aerospace Standard
  • ARP1307B
  • Current
Published 2013-04-09 by SAE International in United States
Test procedures are described for measuring noise at specific receiver locations (passenger and cargo doors, and servicing positions) and for conducting general noise surveys around aircraft. Procedures are also described for measuring noise level and directivity at noise source locations to facilitate the understanding and interpretation of the data. Requirements are identified with respect to instrumentation; acoustic and atmospheric environment; data acquisition, reduction and presentation, and such other information as is needed for reporting the results. This document makes no provision for predicting APU or component noise from basic engine characteristics or design parameters, nor for measuring noise of more than one aircraft operating at the same time. No attempt is made to suggest acceptable levels of noise or suitable subjective criteria for judging acceptability. ICAO Annex 16 Volume I Attachment C provides guidance on recommended maximum noise levels.
Datasets icon
Annotation icon

Standard Values of Atmospheric Absorption as a Function of Temperature and Humidity

A-21 Aircraft Noise Measure Noise Aviation Emission Modeling
  • Aerospace Standard
  • ARP866B
  • Current
Published 2012-12-03 by SAE International in United States
No Abstract Available.
Datasets icon
Annotation icon

Type Measurements of Airplane Interior Sound Pressure Levels During Cruise

A-21 Aircraft Noise Measure Noise Aviation Emission Modeling
  • Aerospace Standard
  • ARP1323B
  • Current
Published 2012-08-16 by SAE International in United States
The primary measurement procedure recommended in this ARP includes the recording of sound pressure signals in the interior of an airplane during steady state cruise conditions with analysis after the flight into octave band (or one-third octave band) sound pressure levels.
Datasets icon
Annotation icon

Prediction Procedure for Near-Field and Far-Field Propeller Noise

A-21 Aircraft Noise Measure Noise Aviation Emission Modeling
  • Aerospace Standard
  • AIR1407A
  • Current
Published 2012-08-16 by SAE International in United States
No Abstract Available.
Datasets icon
Annotation icon

Prediction Method for Lateral Attenuation of Airplane Noise During Takeoff and Landing

A-21 Aircraft Noise Measure Noise Aviation Emission Modeling
  • Aerospace Standard
  • AIR1751A
  • Current
Published 2012-08-16 by SAE International in United States
No Abstract Available.
Datasets icon
Annotation icon

Gas Turbine Coaxial Exhaust Flow Noise Prediction

A-21 Aircraft Noise Measure Noise Aviation Emission Modeling
  • Aerospace Standard
  • AIR1905A
  • Current
Published 2012-08-16 by SAE International in United States
No Abstract Available.
Datasets icon
Annotation icon