A-A12@ 587 USAF BIOENVIRONMENTRL NOISE DRTA HANDBOOK VOLUME 157 1/1KC-iBA IN-FLIGHT CRE.. CU) AIR FORCE AEROSPACE MEDICALRESEARCH LRB IRIGHT-PATTERSON AFB.. H K HILLE SEP 92

UNCLASSIFIED AMRL-TR-75-50-VOL-i57 F/G 1/2 , L

MENNEN IND

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MICROCOPY RESOLUTION TEST CHART1 NATIONAL BUREAU OF STANDARDS-1963-A

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AMRL-TR-75-50Volume 157

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USAF MOENVIRONMENTAL NOISE DATA HANDMOOK

Volume 157

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AURhPACR MEMOAL DWEION

W35Gf1'PATZ'nON AM FORME UASE OHO 4548

810 20 0,29

NOTICES

* . When US Government drawings, specifications. or other data are used for any purpose other than a

definitely related Government procurement operation, the (;overnment thereby incurs no responsibilitynor any obligation whatsoever, and the fact that the Government may have formulated, furnished, orin any way supplied the said drawings, specifications, or other data, is not to be regarded byimplication or otherwise, as in any manner licensing the holder or any other person or corporation, or

* conveying any rights or permission to manufacture, use, or sell any patented invention that may in anyway be related thereto.

Please do not request copies of this report from Air Force Aerospace Medical Research Laboratory.

Additional copies may be purchased from:

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TECHNICAL REVIEW AND APPROVAL

ANRL-TR-75-50, Vol. 157

This report has been reviewed by the Office of Public Affairs (PA) and is releasable to the National

Technical Information Service (NTIS). At NTIS, it will be available to the general public, includingforeign nations.

This technical report has been reviewed and is approved for publication.

FOR THE COMMANDER

HENNING VON GIERKE, )r Ing

DirectorBiodynamics and Bioengineering DivisionAir Force Aerospace Medical Research. Laboratory

SECURITY CLASSIFICATION OF THIS PAGE (lh., Date Etered)DOCUMENTATION PAGE READ INSTRUCTIONS

REPORT DBEFORE COMPLETING FORM01. RPORT NUMER 2.GOVT ACCESSION NO 2. RECIPIENT'S CATALOG NUMBER

AMRL-TR-75-50, Vol. 1574. TITLE (And Subtitle) S. TYPE OF REPORT & PERIOD COVERED

USAF BIOENVIRONMENTAL NOISE DATA HANDBOOK: Volume 157 of a seriesKC-1OA In-Flight Crew Noise 6. PERFORMING ORG. REPORT NUMBER

7. AUTHOR() S. CONTRACT OR GRANT NUMBER(e)

Harald K. Hille

. PERFORMING ORGANIZATION NAIIE AND ADDRESS 10. PROGRAM ELEMENT, PROJECT. TASKo..P ORMNGOGNIREIA &. WORK UNITRMBERAir Force Aerospace Medcal Research Laboratory AREAS WORK UNIT NUMBERSAerospace Medical Division, Air ForceSystems Command, Wright-Patterson AFB, OH 45433 62202F 72310918Il. CONTROLLING OFFICE NAME AND ADDRESS 12. REPORT DATE

Same as above September 198213. NUMBER OF PAGES1 18

14. MONITORING AGENCY NAME & ADDRESS(If different from Controlling Office) I. SECURITY CLASS. (o this report)

UnclassifiedIS&. DECL ASSI FICATION/DOWNGRADING

SCHEDULE -

IS. DISTRIBUTION STATEMENT (of this Report) ..'

Approved for public release; distribution unlimited

17. DISTRIBUTION STATEMENT (of the abstract entered In Block 20, if different from Report)

IS. SUPPLEMENTARY NOTES

I1 I fY WORDS (Continue an reverse side it necessary and identify by block number)

Noise Environments

Bioenvironmental NoiseIn-flight Crew NoiseKC-IOA Aircraft

20. ABSTRACT (Continue an reverse de If neceory and Identify by block number)

.. The KC-lOA is the standard USAF tanker-transport aircraft with high-speed,high-altitude refueling and long range transport capability. This reportprovides measured data defining the bloacoustic environments at flight crew/passenger locations inside this helicopter during normal flight operations. Dataare reported for 24 locations in a wide variety of physical and psychoacousticmeasures: overall and band sound pressure levels, C-weighted and A-weightedsound levels, preferred speech interference level, perceived noise levels,

DD IJ 1473 EDITION OF I NOV 65 IS OBSOLETESECURITY CLASSIFICATION OF THIS PAGE ('hon De& Entered)

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SECURITY CLASSIFICATION OF THIS PAGl(Wam Date sno**-

and limiting times Yor total daily exposure of personnel with and withoutstandard Air Force ear protectors. Refor to Volume 1 of this handbook, "USAFBtoenvironmental Noise Data Handbook, Vol 1: Organizati6n, Content andApplication," AIRL-TR-75-50(l) 1975, for discussion of the objective anddesign of the handbook, the types of data presented, measurement procedures,instrumentation, data processing, definitions f quantities, symbols,equations, applications, limitations, etc. -0

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S-UIYCASFCTO FTI AEVmf aaRtm.

PREFACE

Thin report was prepared by the Biodynamic Environment Branch, Air Force Aerospace Medical Researchlaboratory, under Project/Task 723109, Communication and Performance Capability and OperationalNoises. The author acknowledges the efforts of Mr. John Cole who established the data analysis require-ments, Mr. Henry Mohiman, and Mr. Fred Lampley of the University of Dayton who assisted in themechanics of data processing and Mrs. Norma Peachey who typed this report and prepared it forpublication.

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TABLE OF CONTENTS

PageINTRODUCTION ....................................... -3

IN-FLIGHT NOISE .......................................................................... 4

LIST OF TABLES

1. Measurement Location and Test Conditions forNoise M easurements ..................................................................... 5

2. Measured Sound Pressure Level/3 Octave Band ................... ....................................................... 6-7

Octave Band .................................................................. 8-9

3 Measures of Human Noise Exposure ..................................................... 10-11

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INTRODUCTION

The KC-10A is a USAF tankertransport aircraft with high-speed high-altitude refueling and long rangetransport capability. This aircraft, which is manufactured by the McDonnell Douglas Corporation, is .'

powered by three CF-6.0C1 turbofan engines each rated at 52,500 lbs. maximum takeoff thrust. Theengines ar manufactured by the General Electric Company, Aircraft Engine Group. -

This volume provides measured and extrapolated data defining bioacoustic environments produced insidethis helicopter. Such data are essential to evaluate ear protection requirements, limiting personnel expo-sure times, voice communication capabilities, and annoyance problems associated with operations of the

*+.j KC-10A ircraft.

This volume is one of a series published by the Air Force Aerospace Medical Research Laboratory* (AFAMEL) under the same report number (AMRLTR.75-60) as a multi-volume handbook that quantifies

the noise environments produced at flight/ground crew locations and in surrounding communities by

operations of Air Force aircraft and ground support equipment. The far-foeld, community-type, noise data9in the handbook describe the noise produced during ground operations of aircraft, ground support equip-ment, and other ground-based equipment or facilities.

-* Volume 1 of this handbook discusses the objectives and design of the handbook, the types of data- presented, measurement procedures, instrumentation, data processing, Refer to Volume 1 (reference 1) for

such information because it is not repeated in other handbook volumes.

A cumulative index lists those aerospace systems contained in the handbook, and identifies the specificvolumes containing each type of environmental noise data available (i.e., inflight/flight crew and pas-senger noise, near-field ground crew noise, far-field/community noise). Volume numbers are assigned .

* sequentially as individual volumes are published.

* I. Cole, John N., USAF Bioenvironmental Noise Data Handbook, Volume 1: Organization, Content andApplication, AMRL.TR75-50(1), Aerospace Medical Research Laboratory, Wright-Patterson Air ForceBase, Ohio, 1975.

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'- - =- *...... .+. ......-.-.... .+. . .

IN-FLIGHT NOISE

MEASUREMENTS.0

All noise measurements were made on-board a standard-configured KC-1OA aircraft during typical speed,altitude, and flight maneuver conditions. These levels describe the standard KC-10A environments, butmay not be representative of those levels encountered if the aircraft has been configured differently (e.g.,major equipment or structural changes).

Acoustic measurements were made at various flight crew and passenger locations. Table 1 lists themeasurement locations and test conditions as numeric/alphabetic designators which are used on the dataPages. The designator 1/A means measurement location 1 and test condition A.

The microphone position was at ear level external to headgear in a region 0.2-0.3 meter from the head whenan individual was present At unoccupied locations, measurements were made at ear level throughout avolume where the head would normally be located. In both cases, the microphone was randomly movedthroughout a spherical volume approximately 0.3 meter in diameter and the resultant samples analyzedusing a 4- or 8- second integration time to obtain a power-averaged level, which effectively smooths outshort-duration fluctuations and best describes the exposure.

Although the presence of a crew member or passenger at a measurement location affects the resultantsound field, the magnitude of such effects is generally small and not significant in determining exposurelimits or voice communication capabilities. Consequently, no distinction is made in this report betweenoccupied and unoccupied measurement locations.

RESULTS

The measured data presented in Table2 define the soundpressure levels (SPL) produced inside the KC-10Aaircraft at the 24 specified locations. This table includes the overall, 1/3 octave band, and octave bandlevels. From these data, C-weighted and A-weighted sound levels, maximum permissible time for oneexposure per day (AFR 161-35) with and without standard Air Force ear protectors, preferred speech

*: interference level, and perceived noise level are calculated and presented in Table 3. These measures arewidely used to assess the effects of noise on personnel and their performance.

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TABLE I

MEASUREMENT LOCATIONS AND TEST CONDITIONS

KC-10A, Barksdale AFB, 21 June 1982

LOCATION POSITION HEIGHT ABOVE DECK

1 Cockpit Between Pilot & Copilot Seated Head Level2 Cockpit Navigator/Flight Engineer Seated Head Level3 Station 480, Seat at Right Sidewall 40" Above Deck4 Station 480, Seat at Centerline 40" Above Deck5 Station 480, Seat at Left Sidewall 40" Above Deck6 Top Bunk, Right Side, Curtain Closed 40" Above Deck7 Top Bunk, Left Side, Curtain Closed 40" Above Deck8 Bottom Bunk, Left Side, Curtain Closed 40" Above Deck9 Bottom Bunk, Left Side, Curtain Closed 40" Above Deck

10 Station 1238, Centerline 40" Above Deck11 Station 1238, Left Sidewall .. 40" Above Deck12 Station 1238, Right Sidewall -40" Above Deck13 Station 1538, Right Sidewall 40" Above Deck14 Station 1538, Centerline 40" Above Deck15 Station 1538, Left Sidewall 40" Above Deck16 Station 1738, Left Sidewall. *40" Above Deck17 Station 1738, Centerline 40" Above Deck18 Station 1738, Right Sidewall 40" Above Deck19 Boom Operating Area, Middle Seat Seated Head Level20 Boom Operating Area, Pumps On, Middle Seat Seated Head Level21 Boom Operating Area, Pumps. On, Left Seat Seated Head Level22 Boom Operating Area, PumpOn, Right Seat Seated Head Level23 Boom Operating Area, Retracting Boom, Doors Open Seated Head Level24 Boom Operating Area, Doors (1ooed Seated Head Level

CONDITION DESCRIPTION

A Engine StartB TaxiC All Engines Idle, Ground RunupD Takeoff/RollE Climb to 5,000 ft.F Climb to 10,000 ft.G Climb to 20,000 ft. - 320 KIASH Cruise - 37,000 ft. 0.8M

AC - Automatic Mode With Both Pads Set on AutoI Cruise - 29,000 ft. - 325 KIAS

* Approach KC-135, Light Door ClosedJ Cruise - 29,000 ft. - Receiving Fuel From KC-135K Cruise - 29,000 ft - 325 KIAS

Approach KC-135, Light Door OpenL Descent to 20,000 ft- 320 KIASM Approach- 3,000 ft.- 150 KIASN Final Approach- 1,000 ft., Gear DownP Landing/Roll

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