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Application of Pure-Tone Atmospheric Absorption Losses to One-Third Octave-Band Data
- Aerospace Standard
- ARP5534
- Reaffirmed
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
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.
Rationale
Atmospheric absorption is an important component of acoustic propagation between a source and receiver. This ARP overviews an updated methodology to calculate atmospheric absorption consistent with current scientific information.
Recommended Content
Aerospace Standard | Standard Values of Atmospheric Absorption as a Function of Temperature and Humidity |
Aerospace Standard | Method for Predicting Lateral Attenuation of Airplane Noise |
Aerospace Standard | Ground-Plane Microphone Configuration for Propeller-Driven Light-Aircraft Noise Measurement |
Topic
Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
TABLE A1 | SOURCE-TO-RECEIVER LEVEL-DIFFERENCE VERSUS ALTITUDE SAE METHOD MINUS EXACT METHOD STATIC 101.325 kPa PRESSURE - HOMOGENEOUS TEMPERATURE/HUMIDITY | |
TABLE A2 | SOURCE-TO-RECEIVER LEVEL-DIFFERENCE VERSUS ALTITUDE SAE METHOD MINUS EXACT METHOD LAPSED PRESSURE @ ALTITUDE - HOMOGENEOUS TEMPERATURE/HUMIDITY | |
TABLE A3 | SOURCE-TO-RECEIVER LEVEL-DIFFERENCE VERSUS ALTITUDE SAE METHOD MINUS EXACT METHOD 30 m LAYERS W/LAPSED PRESSURE - HOMOGENEOUS TEMPERATURE/HUMIDITY | |
TABLE A4 | SOURCE-TO-RECEIVER LEVEL-DIFFERENCE VERSUS ALTITUDE SAE METHOD MINUS EXACT METHOD LARSON DAVIS LONG FILTER (LD ) STATIC 101.325 kPA PRESSURE - HOMOGENEOUS TEMPERATURE/HUMIDITY | |
TABLE A5 | SOURCE-TO-RECEIVER LEVEL-DIFFERENCE VERSUS ALTITUDE ARP866A METHOD MINUS SAE METHOD STATIC 101.325 kPa PRESSURE - HOMOGENEOUS TEMPERATURE/HUMIDITY |
Issuing Committee
A-21 Aircraft Noise Measurement Aviation Emission Modeling
To develop and maintain relevancy of recommended practices for aircraft noise measurement and guidance for modeling of both aircraft noise and aviation emissions and to promote a unified technical approach to support the practical assessment of their impact.
Reference
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