A Sensitivity Analysis Comparing Two Procedures for Adjusting As-Measured Spectra to Reference Conditions : SAE ARP 866A vs. ISO 9613-1/ANSI S1.26-1995.

Reherman, Clay N; Roof, Christopher J.; Fleming, Gregg G.; John A. Volpe National Transportation Systems Center (U.S.)

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A Sensitivity Analysis Comparing Two Procedures for Adjusting As-Measured Spectra to Reference Conditions : SAE ARP 866A vs. ISO 9613-1/ANSI S1.26-1995.

2002-05-01
By Reherman, Clay N ; Roof, Christopher J. ; Fleming, Gregg G.

[PDF-3.13 MB]

English

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Creators:

Reherman, Clay N ; Roof, Christopher J. ; Fleming, Gregg G.

Reherman, Clay N ; Roof, Christopher J. ; Fleming, Gregg G. Less -
Corporate Creators:

John A. Volpe National Transportation Systems Center (U.S.)
Subject/TRT Terms:

[+]

Absorption Spectra Alternatives Analysis Approach Sensitivity Analysis Sound Level Standards Takeoff
Resource Type:

Research Paper
Corporate Publisher:

John A. Volpe National Transportation Systems Center (U.S.)
Abstract:

Two procedures for adjusting as-measured test-day spectra to reference day conditions –

the Society of Automotive Engineers’ (SAE) Aerospace Recommended Practice (ARP)

No. 866A (866A) and a procedure utilizing pure-tone absorption equations, developed in

support of the International Organization for Standardization’s (ISO) 9613-1 and the

American National Standards Institute’s (ANSI) S1.26-1995, and refined for application

to one-third octave-band data – were evaluated and compared. The ISO and ANSI puretone

absorption equations are identical to each other. The 866A procedure historically

has been used for atmospheric absorption corrections for Federal Aviation Regulations

(FAR) Part 36, Noise Standards: Aircraft Type and Airworthiness Certification and

similar regulations of the International Civil Aviation Organization (ICAO). The

ISO/ANSI procedure analyzed herein is under consideration for inclusion into

harmonized regulations. This document presents a comparison of data corrected to

several distances using the two different methodologies.
Format:

PDF
Collection(s):

Volpe Center
Main Document Checksum:

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urn:sha256:ee0e29bf3f6335cf4369c296d56bdbe426d31df8d9862abfe851b27a5a7994be
Download URL:

https://rosap.ntl.bts.gov/view/dot/9515/dot_9515_DS1.pdf
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A Sensitivity Analysis Comparing Two Procedures for Adjusting As-Measured Spectra to Reference Conditions : SAE ARP 866A vs. ISO 9613-1/ANSI S1.26-1995.

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