1、V I h4ETRIC I MIL-STD- 1474D 12 February 1997 SUPERSEDING (See Section 6.4) DEPARTMENT OF DEFENSE DESIGN CRITERIA STANDARD NOISE LIMITS AMSC A7245 AREA HFAC Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NOTICE OF 1 CHANGE 1 MIL-STD- 1474D NOTICE 1
2、29 August 1997 DEPARTMENT OF DEFENSE DESIGN CRITERIA STANDARD NOISE LIMITS TO ALL HOLDERS OF MIL-STD- 1474D: 1. MAKE THE FOLLOWING PEN-AND-INK CHANGES: a. Page 58, Requirement 5, paragraph 6.3: Delete “(see 4.2).” b. Page 58, Requirement 5, paragraph 6.3d: Delete “(see 4.3).” c. Page 59, Requirement
3、 5, paragraph 6.3: Delete “(see 5.9); b. Page 59, Requirement 5, paragraph 6.3q: Change “(see 5.10)” to “(see 5.9)” 2. RETAIN THIS NOTICE AND INSERT BEFORE TABLE OF CONTENTS. 4. Holders of MIL-STD-1474D will verify that the changes indicated above have been made. This notice page will be retained as
4、 a check sheet. This issuance is a separate publication. Each notice is to be retamed by stocking points until the standard is completely revised or canceled. Custodians: Navy - AS Air Force - 11 ArmY-MI Review activities: Army - AM, AT, MD, ME, TE Navy - OS, SHY TD, YD Industry associations: AIA AS
5、A EIA HFES SAEi Civil Agency Coordinating Activities: DOT - FAA EPA NIST DOL (OSHA) NASA - MSF AMSC A7245 Preparin activity: (Project WAC-0083) hY- Id AREA HFAC Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-3474D 9999933 0493887 49T MIL-STD
6、- 1474D FOREWORD 1. This standard has been approved for use by all Departments and Agencies of the Department of Defense. 2. Three different types of “noise criteria“ used to limit noise exposure have evolved: a. Hearing damage-risk criteria (DRC) are comprehensive statements of the relation between
7、 various descriptive parameters of the noise exposure (e.g., sound pressure level, exposure time) and the probability of temporary or permanent hearing loss. DRC are statements regarding the probability of hearing loss resulting from noise exposure in specified proportions of the population. DRC ser
8、ve as the data base for developing hearing Conservation criteria and materiel design standards. Examples of current DRC are Hazardous Exposure to Intermittent and Steady-State Noise (1965) and Proposed Damuge-Risk Criterion for Impulse Noise (Gunfire) (1968), both published by the National Academy o
9、f Sciences-National Research Council Committee on Hearing, Bioacoustics and Biomechanics, Washington, D.C. b. Hearing conservation criteria are noise exposure limits that, when exceeded, indicate the need for hearing conservation measures. In the Army these criteria, as well as guidelines for conduc
10、ting comprehensive hearing conservation programs, are contained in DA PAM 40-501 , Hearing Conservation. DA PAM 40-501 contains information on noise and hearing conservation programs applicable to both military and civilian personnel of the Army; provides guidance for medical officers, occupational
11、physicians, audiologists, and other personnel of the Army Medical Department concerned with implementing these programs; outlines implementation of educational aspects of these programs; and identifies the roles of command and of all levels of supervision in these programs. Navy criteria and guideli
12、nes for conducting hearing conservation programs are found in OPNAVINST 5 100.23BY Navy Occupational Safety and Health (NAVOSH) Program Mund, and OPNAVINST 5 100.19B , NAVOSH Program Manual for Forces Afloat. Air Force criteria are contained in AFOSHSTD 48-19, Hazardous Noise Program. c. Materiel de
13、sim standards provide specific noise limits and other requirements to equipment designers and manufacturers. They are intended to cover typical operational conditions. Required noise limits must not be exceeded if the materiel is to be acceptable to the procuring activity. Design standards evolve fr
14、om considerations of hearing damage-risk, speech intelligibility, aural detection, state-of-the-art of noise reduction, and government legislation. 3. It is important to distinguish among the three types to choose the proper one for application and use in various situations. This document is based o
15、n the provisions of DA PAM 40- 501, OPNAVINST 5100.23B, OPNAVINST 5100.19B, and AFOSHSTD 48-19 for noise exposure criteria and MIL-STD-1472 for communications criteria. 4. This standard is neither a hearing damage risk criterion nor a hearing conservation criterion. It is a set of design criteria. 5
16、. The criteria contained herein are more stringent than Occupational Safety and Health Administration (OSHA) standards and will be used in lieu of OSHA standards (29 CFR 1910.95). Whenever feasible, all new equipment, whether newly designed or purchased, shall emit the lowest possible noise levels.
17、6. The acoustical noise provisions for fixed wing aircraft are structured to draw attention to aspects of the design where tailoring of requirements is necessary or possible. 7. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this d
18、ocument should be addressed to Commander, U.S. Army 11 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-c MIL-STD- 1474D b Missile Command, ATTN: AMSMI-RD-SE-TD-ST, Redstone Arsenal, AL 35898-5270 by using the Standardization Document Improvement Prop
19、osal (DD Form 1426) appearing at the end of this document or by letter. iii Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-8 MIL-STD-3474D 9999933 0493889 2b2 . MIL-STD- 1474D . CONTENTS PARAGRAPH 1 SCOPE 1.1 Scope 1.2 Applicability 1.3 Intended use
20、 2 APPLICABLE DOCUMENTS 2.1 General 2.2 Government documents 2.3 Non-Government publications 2.4 Order of precedence PAGE 3 DEFTNITIONS 3 4 GENERAL, REQUIREMENTS 3 5 DETAILED REQulREMENTS 5 6 6.1 6.2 6.3 6.4 6.5 6.6 6.7 NOTES Intended use Issue of DoDISS Associated Data Item Descriptions IDS) Supers
21、ession data Subject term (key word) listing Changes from previous issue Guidance documents lNDIVIDUAL REQUIREMENTS Requirement 1 - Steady-state noise, personnel occupied areas 11 Requirement 2 - Aural nondetectability 20 Requirement 3 - Community Annoyance 33 Requirement 4 - Impulse noise, personnel
22、 occupied areas 35 Requirement 5 - Shipboard equipment noise 49 Requirement 6 - Aircraft noise 65 Requirement 7 - Rotary-wing aircraft noise 71 FIGURE 1 2 3 2- 1 2-2 2-3 2-4 2-5 2-6 4- 1 4-2 Noise hazard caution sign 4 Sample form showing acoustical test data for M561 cargo truck 7 Blank acoustical
23、test data form 8 Level I nondetectability limits for 10 - 30 meters Level I nondetectability limits for 100 - 400 meters Level I nondetectability limits for 500 - 6000 meters Level II nondetectability limits for 10 - 30 meters Level II nondetectability limits for 100 - 400 meters Level II nondetecta
24、bility limits for 500 - 6000 meters 27 28 29 30 31 32 Peak sound pressure levels and B-duration limits for impulse noise 38 Sample determination of B-duration 44 iv Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-FIGURE 4-3 4-4 4-5 4-6 5- 1 5 -2 5-3
25、5-4 5-5 7- 1 TABLE 1 -I 1 -II 2-1 2-11 2-IrI 3 -I 4-1 5-1 5-11 6-1 7-1 APPENDIX A B MIL-STD- 1474D Sample determination of B-duration Sample determination of B-duration Sample determination of B-duration Determination of B-duration Sound measurement locations for small equipment, in addition to loca
26、tion of operators head Sound measurement locations for medium size equipment, in addition to location of operators head Sound measurement locations for large equipment Sound measurement locations for valves Standard test fixture Size and wording of stencil Steady-state noise categories Steady-state
27、noise limits (dBA) for personnel-occupied areas Level I aural nondetectability limits (dB) Level II aural nondetectability limits (dB) Frequency (Hz) and accompanying 1/3 octave band ambient noise levels (dB) for both level I and level II categories Sound level limits and test procedures for communi
28、ty annoyance Impulse noise daily exposure limits Acceptable octave band sound pressure levels in dB re 20 mPa Equivalent A-weighted sound levels Noise limits for unprotected exposures Helicopter sound pressure level (dB) design limits Guidance for Requirement 6 Hearing protector noise attenuation PA
29、GE 45 46 47 48 60 61 62 63 64 73 12 13 22 23 24 34 36 51 52 66 74 79 97 V Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MLSTD-1474D 1. SCOPE 1.1 Scope. This standard establishes acoustical noise limits and prescribes testing requirements and measur
30、ement techniques for determining conformance to the noise limits specified herein. 1.2 Applicability. This standard applies to the acquisition and product improvement of all designed or purchased (non-developmental items) systems, subsystems, equipment, and facilities that emit acoustic noise. This
31、standard is intended to address noise levels emitted during the full range of typical operational conditions. 1.3 Purpose. This standard provides criteria for designing materiel having noise levels that: a. minimize noise induced hearing loss, b. permit acceptable speech communication in a noisy env
32、ironment, c. minimize aural detection by an enemy, d. minimize community annoyance, and e. provide acceptable habitability of personnel quarters. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3,4, and 5 of this standard, including individual Requ
33、irements 1 - 7. This section does not include documents cited in other sections of this standard or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirem
34、ents documents cited in sections 3,4, and 5 of this standard, including individual requirements 1 - 7 whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the e
35、xtent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS DEPARTMENT OF DEFENSE ML-P- 15024 -
36、Plates, Tags, and Bands for Identification of MIL-M- 17 185 - Mounts, Resilient; General Specifications and Tests Equipment for (Shipboard Application) 6E90076E2000, 5B350O76E100BB, 6E150BB7 7E450BB7 and 6E900BB 11M25, and 10M50 MIL-M-17508 - Mounts, Resilient: Types 6E100,6E150,7E450, MIL-M- 19379
37、- Mounts, Resilient, Mare Island Types 1 lM15, ML-M- 19863 - Mounts, Resilient: Type 5B5, OOOH MIL-M-2 1649 - Mounts, Resilient, Type 5M10, OOOH 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-3474D 9999911 0493892 857 MIL-STD- 1474D STANDA
38、RDS DEPARTMENT OF DEFENSE MIL-STD-1472 - Human Engineering HANDBOOKS DEPARTMENT OF DEFENSE MIL-HDBK-1473 - Color and Color and Marking of Army Materiel MIL-HDBK-1908 - Definitions of Human Factors Terms (Unless otherwise indicated, copies of federal and military specifications, standards, and handbo
39、oks are available from the Standardization Documents Order desk, 700 Robbins Avenue, Bldg 4D, Philadelphia, PA 19 1 11-5094.) 2.2.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent
40、specified herein. Unless otherwise specified, the issues are those cited in the solicitation. 29 CFR 1910.145 - Specification for Accident Prevention Signs and Tags 40 CFR 204 - Noise Emission Standards for Construction Quipment (Copies of specifications, standards, and other publications required b
41、y contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specifie
42、d, the issues of the documents which are DoD adopted are those listed in the issue of the DoDISS cited in the solicitation. Unless otherwise specified, the issues of these documents not listed in the DoDISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN NATIONAL STANDA
43、RDS INSTITUTE (ANSI) ANSI S 1.1 - Acoustical Terminology ANSI S 1.2 - Physical Measurement of Sound, Method for ANSI S 1.4 - Sound Level Meters, Specification for OD adopted) ANSI S 1.6 - Preferred Frequencies and Band Numbers for Acoustical ANSI S1.10 - Calibration of Microphones, Method for the OD
44、 adopted) ANSI S1.11 - Octave-Band and Fractional-Octave-Band Analog and ANSI S1.13 - Sound Pressure Levels, Method for the Measurement of ANSI S 1.40 - Acoustical Calibrators, Specification for OD adopted) ANSI S3.5 - Articulation Index, Method for the Calculation of OD adopted) ANSI S6.1 - Qualify
45、ing a Sound Data Acquisition System, Recommended Measurements OD adopted) Digital Filters, Specification for OD adopted) (DoD adopted) Practice (Requests for copies should be addressed to the American National Standards Institute, Inc., 1430 Broadway, New York, NY 10018.) 2 Provided by IHSNot for Re
46、saleNo reproduction or networking permitted without license from IHS-,-,-SOCIETY OF AUTOMOTIVE ENGINEERS (SAE) SAE J88 - Sound Measurement - Earthmoving Machinery - Exterior SAE J 184 - Qualifying a Sound Data Acquisition System OD adopted) SAE J366 - Exterior Sound Level for Heavy Trucks and Buses
47、OD adopted) SAE J986 - Sound Level for Passenger Cars and Light Trucks OD adopted) SAE J1074 - Engine Sound Level Measurement Procedure (DoD adopted) OD adopted) (Requests for copies should be addressed to the Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale, PA 15096-0001.) INTER
48、NATIONAL ORGANIZATION FOR STANDARDIZATION (ISO) IS0 R-226 - Normal Equal-Loudness Contours for Pure Tones and Normal Threshold of Hearing Under Free-Field Listening Conditions (Requests for copies should be addressed to the American National Standards Institute, Inc., 1430 Broadway, New York, NY 100
49、18.) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. DEFINITIONS Terms are defined in accordance with MIL-HDBK-1908. Terms not appearing in MIL- HDBK-1908 are defined in a
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