Noise Vibration _ Abschn

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    Section 2

    Required Noise and Vibration Limits

    A. General

    1. Requirements given in these Rules refer tohuman wellbeing only. However, to achieve a certainlevel of noise and vibration comfort, it must beensured that main and auxiliary machinery do not

    vibrate heavily. Therefore, limit values given incorresponding standards or classification rules, forinstance GL Rules, I Ship Technology, Part 1

    Seagoing Ships, Chapter 2 Machinery Installations,Section 2, Fig. 2.1,shall be observed, too.

    2. Requirements regarding acoustic privacy aregiven in addition to those for noise and vibration.

    3. Requirements for noise and vibration arepresented for three operating conditions:

    Sea Mode

    Harbour Operation

    Thruster Operation

    The noise and vibration limits given for Sea ModeOperation form an upper bound for any operationmode at typical ship speeds.

    4. Requirements regarding measurements forthree operating conditions are given in Section 3, B.

    5. Limits are given separately for passengerand crew spaces.

    6. Requirements are related to differentimmission zones as defined by Frame A, B, C andD. The principal arrangement of these zones is shown

    in Fig. 2.1 for a typical seagoing passenger vessel,see also Annex B.

    B. Noise Requirements

    1. Most relevant standards are ISO 2923, ISO717/1 and ISO 717/2.

    2. Required noise limit values depending onthe harmony category number (hc) are listed inTables 2.1to 2.4.

    3. The measurement procedure and the

    calculationofthehc achieved by noise measurementsare described in Section 3, C. and Section 4,respectively.

    C. Vibration Requirements

    1. The most relevant vibration standard is ISO

    6954, edition 2000-12-15. The limit values refer,consequently, to the overall frequency-weighted rmsvalue in the range of 1 to 80 Hz. The vibrationvelocities are given in mm/s.

    2. Required vibration limit values dependingon the harmony category (hc) are listed in Tables 2.5and 2.6.

    3. The measurement procedure and the

    calculation of the hc achieved by vibrationmeasurements are described in Section 3, C. andSection 4, respectively.

    Fig. 2.1 Immission Zones

    I - Part 1

    GL 2003

    Section 2 Required Noise and Vibration Limits Chapter 16

    Page 21

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    Table 2.1 Noise Limits, Passenger Spaces

    Sea Mode 1, 2Harbour

    Operation 1, 2

    Thruster

    Operation2 , 3, 4

    hc hc hcNoise Level Limits in dB(A)

    E 1 2 3 4 E 1 2 3 4 E 1 2 3 4

    Indoor Spaces Aft of Frame A

    First-class cabins 48 50 52 54 56 44 46 48 50 52 52 54 56 58 60

    Standard cabins 52 54 56 58 60 46 48 50 52 54 56 58 60 62 64

    Public spaces, type 1 and 2 56 58 60 62 64 52 54 56 58 60 60 62 64 66 68

    Corridors, staircases 56 58 60 62 64 54 56 58 60 62

    Indoor Spaces Between Frame A and C

    First-class cabins 46 48 50 52 54 44 46 48 50 52 52

    54 56 58 60

    Standard cabins 48 50 52 54 56 46 48 50 52 54 54 56 58 60 62

    Public spaces, type 1 and 2 52 54 56 58 60 52 54 56 58 60 58 60 62 64 66

    Corridors, staircases 54 56 58 60 62 54 56 58 60 62

    Indoor Spaces Between Frame C and D

    First-class cabins 44 46 48 50 52 44 46 48 50 52 52 54 56 58 60

    Standard cabins 46 48 50 52 54 46 48 50 52 54 54 56 58 60 62

    Public spaces, type 1 and 2 52 54 56 58 60 52 54 56 58 60 58 60 62 64 66

    Corridors, staircases 54 56 58 60 62 54 56 58 60 62

    Indoor Spaces Forward of Frame D

    First-class cabins 44 46 48 50 52 44 46 48 50 52 52 54 56 58 60

    Standard cabins 46 48 50 52 54 46 48 50 52 54 56 58 60 62 64

    Public spaces, type 1 and 2 52 54 56 58 60 52 54 56 58 60 60 62 64 66 68

    Corridors, staircases 54 56 58 60 62 54 56 58 60 62

    Outdoor Spaces

    Open deck recreation areas 64 66 68 70 75 64 66 68 70 72 64 66 68 70 72

    Exhaust/supply air openings in open deckrecreation areas 5 68 70 72 75 80 68 70 72 75 80 68 70 72 75 80

    1 In each space the noise level generated only by air-conditioning and mechanical ventilation systems must be at least 4 dB(A) below the

    required noise limit value for harbour operation.2 In each sanitary cell the noise level generated only by air-conditioning exhaust air systems at full capacity must not be more than 5

    dB(A) above the required noise limit value for harbour operation.3 To be verified by measurements in the vicinity of thrusters only. Passenger indoor spaces aft of Frame A shall be considered during stern

    thruster operation only. All thrusters running at not less than 70 % of full load. The noise limits shall be maintained also in standby

    operation of thrusters.

    4 Limit values valid, provided that thrusters are in operation for a maximum of 4 hours out of 24 hours.5 At a distance of 1,5 m.

    Chapter 16

    Page 22

    Section 2 Required Noise and Vibration Limits I - Part 1

    GL 2003

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    Table 2.2 Noise Limits for Acoustic Privacy, Passenger Spaces

    On board Acoustic Privacy Sound Insulation

    (minimum requir edweighted apparent sound insulation index in dB

    according to ISO 717/1 and ISO 140/4)

    hc

    Arrangements:

    E 1 2 3 4

    First-class cabins to first-class cabins (incl. bath to bath) 42 40 38 36 34

    First-class cabins to standard cabins (incl. bath to bath) 42 40 38 36 34

    Standard cabins to standard cabins (incl. bath to bath) 40 38 36 34 32

    First-class cabins to corridors 40 38 36 34 32

    Standard cabins to corridors 38 36 34 32 30

    Pax cabins to crew spaces 50 48 46 44 42

    Pax cabins to public spaces type 11 64 62 60 58 56

    Pax cabins to public spaces type 2 58 56 54 52 50

    Pax cabins to staircases 2

    58 56 54 52 50

    Pax cabins to engine room casings, elevator casings etc. 3 60 58 56 54 52

    Pax cabins to HVAC rooms 4 58 56 54 52 50

    Pax cabins to engine rooms 5

    64 62 60 58 56

    1 The sound pressure levels (SPL) for the 1/1 octave band mid frequencies that should not be exceeded

    in public spaces type 1 (when in use) are listed as follow:

    Frequency in Hz 31,5 63 125 250 500 1 k 2 k 4 k 8 k

    SPL in dB(A) 65 72 78 85 88 91 94 94 94

    2 In general, the number of passenger cabins located adjacent to staircases have to be minimized.

    3 Number of passenger cabins located adjacent to engine rooms and elevator casings etc. should beminimized. If possible, acoustic buffer zones (e.g., service stores, lockers etc.) should be arranged

    between cabins and casings. The average sound pressure level in engine room casings must belimited to max. 100 dB(A).

    4 Average sound pressure level in HVAC rooms located adjacent to passenger cabins must be limited

    to max. 80 dB(A).

    5 Arrangement of passenger cabins adjacent to engine rooms should be avoided. Otherwise specific

    provisions are required to achieve limit values.

    I - Part 1

    GL 2003

    Section 2 Required Noise and Vibration Limits Chapter 16

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    Table 2.2 Noise Limits for Acoustic Privacy, Passenger Spaces (cont'd.)

    On board Acoustic Privacy Impact Sound Insulation

    (maximum permissiblenormalized sound pressure level index in dB

    according to ISO 717/2 and ISO 140/7)

    hc

    Arrangements:

    E 1 2 3 4

    Pax cabins adjacent to pax cabins (soft floor) 46 48 50 52 54

    Pax cabins adjacent to corridors (soft floor) 46 48 50 52 54

    Pax cabins adjacent to crew spaces 46 48 50 52 54

    Pax cabins adjacent to public spaces type 1 46 48 50 52 54

    Pax cabins adjacent to public spaces type 1a maximum 46 dB

    Pax cabins adjacent to public spaces type 2 (hard floor) 48 50 52 54 56

    Pax cabins adjacent to public spaces type 2 (soft floor) 46 48 50 52 54Pax cabins adjacent to service spaces (galleys, pantries etc.) 46 48 50 52 54

    Pax cabins adjacent to open deck recreation areas 6 maximum 60 dB

    Pax cabins adjacent to jogging paths, sport courts etc. 7 7 7 7 7

    6 Arrangement of passenger and crew cabins below open deck recreation areas should be avoided.

    However, if so arranged the limit of the normalised impact sound pressure level for cabins below

    those spaces must be agreed upon between owner, yard and Germanischer Lloyd but must not

    exceed 60 dB in any case.

    7 Arrangement of passenger and crew cabins below jogging paths, sport courts etc. should be

    avoided. However, if so arranged the limit of the normalised impact sound pressure level for

    cabins adjacent to those spaces must be agreed upon between owner, yard and Germanischer

    Lloyd.

    Chapter 16

    Page 24

    Section 2 Required Noise and Vibration Limits I - Part 1GL 2003

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    Table 2.3 Noise Limits, Crew Spaces

    Sea Mode 1Harbour

    Operation 1

    Thruster

    Operation 2, 3

    hc hc hc

    Noise Level Limits in dB(A)

    E 1 2 3 4 E 1 2 3 4 E 1 2 3 4

    Work Spaces

    Machinery spaces (not continuously manned) 5 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110

    Engine control rooms 67 69 71 73 75 64 66 68 70 72 67 69 71 73 75

    Workshops 80 80 85 85 85 80 80 80 80 80

    Open deck working areas 4

    75 75 80 80 85 75 75 80 80 85 75 75 80 80 85

    Stores 5 80 80 85 90 90 75 75 80 85 85

    Indoor spaces not specified

    5

    90 90 90 90 90 90 90 90 90 90

    Service Spaces

    Galleys 6

    68 70 72 75 75 66 68 70 75 75 68 70 72 75 75

    Serveries, pantries 6 66 68 70 75 75 66 68 70 75 75 66 68 70 75 75

    Navigation Spaces

    Navigation bridge and chart rooms 55 55 60 60 65 55 55 60 60 65 58 58 60 60 65

    Radio rooms 55 55 60 60 60 55 55 60 60 60 55 55 60 60 60

    Listing posts, including outdoor bridge wings 7

    65 65 70 70 70 65 65 65 70 70 65 65 70 70 70

    Accommodation Spaces

    Day and sleeping rooms / officers 50 52 54 56 58 50 52 54 56 58 62 64 66 68 70

    Day and sleeping rooms / others 52 54 56 58 60 52 54 56 58 60 64 66 68 70 72

    Mess rooms, offices, recreation rooms 57 59 61 63 65 57 59 61 63 65 66 68 70 72 74

    Hospitals 54 56 58 60 60 54 56 58 60 60 64 66 68 70 72

    Gymnasiums, treatment rooms 57 59 61 63 65 57 59 61 63 65

    Corridors adjacent to cabins 58 60 62 64 66 56 58 60 62 64

    Open deck recreation areas 68 70 72 75 75 68 70 72 75 75

    1 In each space the noise level generated only by air-conditioning and mechanical ventilation systems must be limited to at least 4 dB(A)below the required noise limit value for harbour operation (excluding work spaces and open recreation areas).

    2 To be verified by measurements in the vicinity of thrusters only. All thrusters running at not less than 70 % of full load. The noise limits

    are also to be maintained in standby operation of the thrusters.3 Limit values valid provided that thrusters are in operation for a maximum of 4 hours out of 24 hours.4 Spaces requiring verbal communication when berthing the ship (maximum 4 hours out of 24 hours).5 Reference is made to IMO Resolution A.468 (XII) ear protectors should be worn when the noise level is above 85 dB(A).6 With mechanical ventilation in normal operation.7 Reference is made to IMO Resolution A.468 (XII) which also requires that the noise level at speed does not exceed 68 dB in the

    1/1 octave band at 250 Hz and does not exceed 63 dB in the 1/1 octave band at 500 Hz.

    I - Part 1

    GL 2003

    Section 2 Required Noise and Vibration Limits Chapter 16Page 25

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    Table 2.4 Noise Limits for Acoustic Privacy, Crew Spaces

    On board Acoustic Privacy Sound Insulation

    (minimum requir edweighted apparent sound insulation index in dB

    according to ISO 717/1 and ISO 140/4)

    hcArrangements:

    E 1 2 3 4

    Cabins to cabins 40 38 36 34 32

    Cabins to corridors 38 36 34 32 30

    Cabins to stairways 56 54 52 50 48

    Cabins to engine room casings, elevator casings etc. 1 58 56 54 52 50

    Cabins to mess rooms, hospitals, gymnasiums, service spaces etc. 58 56 54 52 50

    Cabins to engine rooms 2 60 58 56 54 52

    1 The number of cabins located adjacent to engine rooms and elevator casings etc. should be minimized. Ifpossible, acoustic buffer zones (e.g., corridors, service stores, lockers etc.) should be arranged between

    cabins and casings. The average sound pressure level in engine room casings shall be limited to max.

    100 dB(A).2 The arrangement of cabins adjacent to engine rooms should be avoided. Otherwise specific provisions are

    required to achieve limit values.

    On board Acoustic Privacy Impact Sound Insulation

    (maximum permi ssiblenormalized sound pressure level in dB

    according to ISO 717/2 and ISO 140/7)

    hcArrangements:

    E 1 2 3 4

    Cabins adjacent to cabins 52 54 56 58 60

    Cabins adjacent to dance floors, stages etc. 50 52 54 56 58

    Cabins adjacent to gymnasiums 52 54 56 58 60

    Cabins adjacent to service spaces (e.g. galleys, pantries etc.) 52 54 56 58 60

    Chapter 16

    Page 26

    Section 2 Required Noise and Vibration Limits I - Part 1GL 2003

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    Table 2.5 Vibration Limits, Passenger Spaces

    Sea ModeHarbour

    Operation

    Thruster

    Operation 1

    hc hc hc

    Vibration Limits in mm/s

    (overall frequency weighted rmsvalue 1 to 80 Hz)E 1 2 3 4 E 1 2 3 4 E 1 2 3 4

    Indoor Spaces Aft of Frame B

    First-class cabins 1.1 1.5 1.9 2.3 2.6 1.6 2.0 2.4 2.8 3.2

    Standard cabins 1.6 2.0 2.4 2.8 3.2 2.0 2.4 2.8 3.2 3.6

    Public spaces, short exposure time 2.4 2.8 3.2 3.6 4.0

    Public spaces, long exposure time 1.8 2.2 2.6 3.0 3.4

    Corridors, staircases

    Indoor Spaces Forward of Frame B

    First-class cabins 0.8 1.2 1.6 2.0 2.4 1.6 2.0 2.4 2.8 3.2

    Standard cabins 1.2 1.7 2.2 2.7 3.2 2.0 2.4 2.8 3.2 3.6

    Public spaces, short exposure time 2.0 2.5 3.0 3.5 4.0

    Public spaces, long exposure time 1.4 1.9 2.4 2.9 3.4

    Corridors, staircases

    Outdoor Spaces Aft of Frame B

    Open deck recreation areas 2.2 2.6 3.0 3.4 3.8

    Open deck recreation areas of overhangs 2.4 2.8 3.2 3.6 4.0

    Outdoor Spaces Forward of Frame B

    Open deck recreation areas 2.0 2.4 2.8 3.2 3.6

    Open deck recreation areas of overhangs 2.2 2.6 3.0 3.4 3.8

    1 Thrusters operating at not less than 70 % of full load.

    I - Part 1

    GL 2003

    Section 2 Required Noise and Vibration Limits Chapter 16Page 27

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    Table 2.6 Vibration Limits, Crew Spaces

    Sea ModeHarbour

    Operation

    Thruster

    Operation 1

    hc hc hc

    Vibration Level Limits in mm/s

    (overall frequency weighted rmsvalue 1 to 80 Hz)E 1 2 3 4 E 1 2 3 4 E 1 2 3 4

    Work Spaces

    Machinery spaces (not continuously manned) 4.4 4.8 5.2 5.6 6.0

    Engine control rooms 2.4 2.8 3.2 3.6 4.0

    Workshops 3.2 3.6 4.0 4.4 4.8

    Stores 4.0 4.5 5.0 5.5 6.0

    Indoor spaces not specified 4.0 4.5 5.0 5.5 6.0

    Service Spaces

    Galleys 2.0 2.5 3.0 3.5 4.0

    Serveries and pantries 2.4 2.8 3.2 3.6 4.0

    Navigation Spaces

    Navigation bridges and chart rooms 2.0 2.5 3.0 3...

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