IMO I814E-1982 NOISE LEVELS ON BOARD SHIPS.pdf

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1、 First pubbshed in 1982 by the INTERNATIONAL MARITIME ORGANIZATION 4 Albert Embankment. London SE1 7SR Printed by the International Maritime Organization, London 16 18 20 19 17 15 ISBN 92-801-1 134-5 Copyright 0 IMO 1982 CONTENTS Page 5 1. CODE ON NOISE LEVELS ON BOARD SHIPS Resolution A.468(XI I) .

2、 . . . . ANNEX 6 Preamble Chapter 1 - General 1.1 Scope . 1.2 Purpose . 1.3 Application . 1.4 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Chapter 2 - Measurement . 2.1 General . 212 Operating conditions at sea 11 11 11 12 12 13 13 13 13 . . . . . . . . . . . . . . . . .

3、 . . 1 . . . . . . . . . . . . . . . . . . . 2.3 2.4 Environmental conditions . 2.5 Safe measurement conditions . 2.6 Measurement procedures . 2.7 Calibration 2.8 Measurement positions Operating conditions in port . 16 16 16 Chapter 3 - Measuring equipment . 3.1 Equipment specifications .,. 3.2 Use

4、of equipment . . . . . . . . . . . . 17 17 18 19 Chapter 4 - Maximum acceptable sound pressure levels 4.1 General 4.2 Noise level limits 4.3 Survey report Chapter 5 - Noise exposure limits . 5.1 General . . . . . . . . . . . . . 20 20 20 20 21 21 . . . . . . . . . . 5.2 Hearing conservation and use

5、of ear protectors . 5.3 5.4 24 hour equivalent continuous sound level limit . 5.5 Hearing conservation programme . Limits of exposure of seafarers to high noise levels Chapter 6 - Acoustic insulation between accommodation spaces . 6.1 General . 6.2 Sound insulation index . 6.3 Erection of materials

6、. 22 22 22 22 . . . . 3 Chapter 7 - Ear protection and warning information . 7.1 General . . . . . 7.2 Recommendation for ear protectors 7.3 Selection and use of ear protectors . 7.4 Warning notices . . . . 7.5 Miscellaneous equipment . . Appendix 1 Format for Noise Survey Report . . Appendix 2 Inst

7、ructions to seafarers and responsibility . . . . . . . . . . . . . . . . Appendix 3 Suggested methods of controlling noise exposure . II. RECOMMENDATION ON METHODS OF MEASURING NOISE LEVELS AT LISTENING POSTS Resolution A.343(1)0 . . . . . . . . . . . . . . . . . . . . . . . . Appendix - Prowisional

8、 Guidelines on maximum acceptable noise lewels at listening posts . . . . . . 4 . . . . . . . . . . . Page 23 23 23 23 24 24 25 29 30 34 35 CODE ON NOISE LEVELS ON BOARD SHIPS (Resolution A.4681Xll) adopted on 19 November 1981 by the Assembly of the International Maritime Organization at its twelfth

9、 session) A THE ASSEMBLY, RECALLING Article 16(i) of the Convention on the International Maritime Organization, RECALLING ALSO resolution A.343(IX) by which it adopted the Recommenda- tion on Methods of Measuring Noise Levels at Listening Posts, NOTING that high noise levels on board ships could aff

10、ect seafarers health and impair the safety of the ship, HAVING DECIDED to specify acceptable noise levels on board ships to safeguard seafarers health and ensure the safe operation of the ship which would complement the review of resolution A.343( IX) aiming at limiting interference of shipborne noi

11、se with external audible navigational signals, Committee at its forty-fourth session, 1. the Annex to this resolution; 2. INVITES all Governments concerned: HAVING CONSIDERED the recommendation made by the Maritime Safety ADOPTS the Code on Noise Levels on Board Ships, the text of which is set out i

12、n (a) To take appropriate steps to implement the provisions of the Code as soon as possible; (b) To inform the Organization of measures taken in this respect and of any experience gained from the application of the Code, together with any information requested by resolution A.343( 1x1. B THE ASSEMBL

13、Y, . HAVING ADOPTED the Code on Noise Levels on Board Ships, RECOGNIZING this Code and the recommendations of resolution A.343(IX) as compatible and companion documents although based on different methods of sound measurements, AUTHORIZES the Maritime Safety Committee to keep both the Code on Noise

14、Levels on Board Ships and the Recommendation on Methods of Measuring Noise Levels at Listening Posts under review, so as to ensure that they reflect current experience gained from their application and other relevant international standards, and to consider the amalgamation of both documents. 5 ANNE

15、X PREAMBLE 1 has been developed to provide guidance to Administrations on principles of noise control on board ships in general. Its purpose is to stimulate and promote noise control at a national level within the framework of internationally agreed guidelines. The Code on Noise Levels on Board Ship

16、 (hereinafter referred to as the Code) 2 should be considered as the main objectives of the Code. 3 attempt to establish international uniformity rather than to set strict rules to be followed. Guidance to Administrations on maximum noise levels and noise exposure limits The recommendations on proce

17、dures and programmes should be regarded as an 4 The Code has been developed having regard to conventional passenger and cargo ships. While certain types and sizes of ships have been excluded from application, it should be recognized that full application to ships which differ appreciably from the co

18、nventional types of ships regarding design or operations might need specific consideration. 5 national legislation although it could provide a basis for such legislation. 6 at listening posts with resolution A.343(lX). This recommendation related to inter- ference by shipborne noise with the proper

19、reception of external audible navigation signals and although the methods of measuring noise levels in accordance with resolu- tion A.343( IX) and with the Code are different, these documents are considered compatible inasmuch as the Code is concerned primarily with the effect of noise on health and

20、 comfort. The Code is not intended for direct incorporation by reference or reproduction in The Organization adopted a recommendation on methods of measuring noise levels I 6 J 1.1 Scope CODE ON NOISE LEVELS ON BOARD SHIPS CHAPTER 1 - GENERAL 1.1.1 The Code is designed to provide standards to preven

21、t the occurrence o poten- tially hazardous noise levels on board ships and to provide standards for an acceptable environment for seafarers. 1.1.2 Recommendations are made for : .1 protecting the seafarer from the risk of noise-induced hearing loss under conditions where at present it is not feasibl

22、e to limit the noise to a lavel which is not potentially harmful; .2 measurement of noise levels and exposure; .3 limits on acceptable maximum noise levels for all spaces to which seafarers normally have access. 1.2 Purpose 1.2.1 in order to: The purpose of the Code is to limit noise levels and to r

23、educe exposure to noise, .1 provide for safe working conditions by giving consideration to the need for speech communication and for hearing audible alarms, and to an environment where clear-headed decisions can be made in control stations, navigation and radio spaces and manned machinery spaces; pr

24、otect the seafarer from excessive noise levels which may give rise to a noise-induced hearing loss; provide the seafarer with an acceptable degree of comfort in rest, recreation and other spaces and also provide conditions for recuperation from the effects of exposure to high noise levels. .2 .3 1.3

25、 Application 1.3.1 The Code applies to new ships of 1,600 tons gross tonnage and over. 1.3.2 The provisions relating to potentially hazardous noise levels contained in the Code should also apply to existing ships of 1,600 tons gross tonnage and over, as far as reasonable and practicable, to the sati

26、sfaction of the Administra- tion. 1.3.3 The Code should apply to new ships of less than 1,600 tons gross tonnage, as far as reasonable and practicable, to the satisfaction of the Administration. 7 General 1.3.4 The Code does not apply to: dynamically supported craft; fishing vessels; pipe-laying bar

27、ges; crane barges; mobile offshore drilling units; pleasure yachts not engaged in trade; ships of war and troopships; ships not propelled by mechanical means. 1.3.5 For ships designed for and employed on voyages of short duration, or on other services involving short periods of operation of the ship

28、, sections 4.2.3 and 4.2.4 may be applied only with the ship in the port condition, provided that the periods under such conditions are adequate for seafarers rest and recreation. 1.3.6 The Code applies to ships in service, i.e. in port or at sea with seafarers on board. 1.3.7 The Code is not intend

29、ed to apply to passenger cabins and other passenger spaces except in so far as they are work spaces and are covered by the provisions of the Code. 1.4 Definitions For the purpose of the Code the following definitions apply. Additional definitions are given elsewhere in the Code. 1.4.1 Accommodation

30、spaces: Cabins, offices (for carrying out ships business), hospitals, mess rooms, recreation rooms (such as lounges, smoke rooms, cinemas, libraries and hobbies and games rooms) and open recreation areas to be used by seafarers. 1.4.2 Auxiliary machinery: Machinery other than main propelling machine

31、ry that is in service when the ship is in normal service, e.g. auxiliary diesel engines, turbo- generators, hydraulic motors and pumps, compressors, boiler ventilation fans, gear pumps. 1.4.3 A-weighted sound pressure level or noise level: The quantity measured by a sound level meter in which the fr

32、equency response is weighted according to the A-weighting curve (see IEC publication 651 1. 1.4.4 Continuously manned spaces: Spaces in which the continuous or prolonged presence of seafarers is necessary for normal operational periods. 1.4.5 lifting operations. Crane barge: A vessel with permanentl

33、y installed cranes designed principally for 8 General 1.4.6 Dutystations: Those spaces in which the main navigating equipment, the ships radio or the emergency source of power are located or where the fire recording or fire control equipment is centralized and also those spaces used for galleys, mai

34、n pantries, stores (except isolated pantries and lockers), mail and specie rooms, workshops other than those forming part of the machinery spaces and similar such spaces. 1.4.7 Dynamically supported craft: A craft which is operable on or above water and which has characteristics different from those

35、 of conventional displacement ships. Within the aforementioned generality, a craft which complies with either of the following characteristics: .1 the weight, or a significant part thereof, is balanced in one mode of operation by other than hydrostatic forces; V - .2 the craft is able to oDerate at

36、sDeeds such that the function dsL is eaual to or greater than 0.9, where V is the maximum speed, “L“ is the water-line length and “g“ is the acceleration due to gravity, all in consistent units. 1.4.8 Earprotector: A device worn to reduce the level of noise heard by the wearer. 1.4.9 Effective sound

37、 level Lefo()(H): A notional continuous sound level which is calculated from the various A-weighted sound levels and duration at these levels with an XdB exchange rate. The exchange rate is the number of dB decrease in noise level which would allow doubling of exposure time. Lef(3)(H) is equal to Le

38、q(H). In instances of fluctuating noise and intermittent exposures 5dB is often used for X. “H“ represents the time period concerned expressed in hours. 1.4.10 Equivalent continuoussound level Lq.(H): A notional level which would in the courseof agiven time period (H) cause the same A-weighted sound

39、 energy to be received as that due to the actual sound over the period. “H“ represents the time period concerned expressed in hours. - 1 f (Pa Leq - 10 log,o - .dt POZ where: T = measurement time pa(t) = A-weighted instantaneous sound pressure po = 20 x 10-6 pascal (the reference level). 1.4.11 walr

40、us or other living resources of the sea. Fishing vessel: A vessel used commercially for catching fish, whales, seals, 1.4.12 Fluctuatingnoise: Noise which isvarying in level rising and falling. For the purpose of this Code it may be taken to mean fluctuations in excess of the steady noise asdefined

41、in 1.4.31 and excludes impulse noise asdefined in 1.4.14. 9 General 1.4.13 Hearing loss: Hearing loss is evaluated in relation to a reference auditory threshold defined conventionally in IS0 Standard 389 (1975). The hearing loss corresponds to the difference between the auditory threshold of the sub

42、ject being examined and the reference auditory threshold. IS0 Standard 1999 (1975)“ takes an average loss of 25 dB calculated at frequencies 500, .1,000 and 2,000 Hz. 1.4.14 Impulse noise: Noise of less than one seconds duration which occurs as an isqlated event, or as one of a series of events with

43、 a repetition rate of less than 15 times per second. 1.4.1 5 Integrating sound level meter: A sound level meter designed or adapted to measure the level of the mean squared time averaged A-weighted sound pressure. 1.4.16 IS0 noise rating (NRI number: The number found by plotting the octave band spec

44、trum on the NR curves given in IS0 Standard R 1996-1967 and selecting the highest noise rating curve to which the spectrum is tangent. 1.4.1 7 Machinery spaces: All spaces containing propulsion machinery, boilers, oil fuel units, steam and internal combustion engines, generators and major electrical

45、 machinery, oil filling stations, refrigerating, stabilizing, ventilation and air-conditioning machinery and similar spaces, and trunks to such spaces. 1.4.18 Mobile offshore drilling unit: A vessel capable of engaging in drilling opera- tions for the exploration for, or exploitation of, resources b

46、eneath the sea-bed, such as liquid or gaseous hydrocarbons, sulphur or salt. 1.4.19 Navigating bridge wings: Those parts of the ships navigating bridge extending towards the ships sides. 1.4.20 Noise: For the purpose of the Code all sound which can result in hearing impairment, or which can be harmf

47、ul to health or be otherwise dangerous. 1.4.21 Noise induced hearing loss: A hearing loss, originating in the nerve cells within the cochlea, attributable to the effects of sound. 1.4.22 Noise level: See A-weighted sound pressure level (1.4.3). 1.4.23 Normal service shaft speed: The shaft speed spec

48、ified for the ships acceptance on initial delivery, or after being modified, as applicable. 1.4.24 Occasional exposures: Those exposures typically occurring once per week, or less frequently . 1.4.25 Passenger: Any person on board other than the master and members of the crew or other persons employ

49、ed or engaged in any capacity on board a ship on the business of that ship. 1.4.26 Pipe-laying barge: A vessel specifically constructed for, or used in conjunction with, operations associated with the laying of submarine pipelines. 1.4.27 Port condition: The condition in which all machinery solely required for propulsion is stopped. This Standard is at present (January 1981 1 being revised. I 10 Measurement 1.4.28 Potentially hazardous noise levels: Those levels at and above which persons exposed to them without protection are at risk o