Pro-Tec Geosystems Pte Ltd provides professional On-Board Vessel Sound Reduction Index Survey Services in Singapore for shipyards, vessel owners, ship managers, offshore operators and marine contractors. Our service helps assess airborne sound insulation performance between vessel spaces to support acoustic comfort, privacy, crew rest quality and marine habitability requirements.
An On-Board Vessel Sound Reduction Index Survey evaluates how effectively vessel partitions, bulkheads, doors, decks, ceilings and separating structures reduce airborne sound transmission between spaces. It helps determine whether accommodation and crew-occupied spaces provide suitable acoustic separation for rest, privacy and comfort.
Noise can travel through bulkheads, doors, gaps, decks, ventilation openings, service penetrations and structural paths. Poor sound insulation can disturb crew rest, reduce privacy and increase fatigue.
Good acoustic separation is important in cabins, hospitals, corridors, mess rooms, recreation rooms and public spaces. A professional vessel SRI survey helps clients:
Pro-Tec Geosystems carries out ship sound insulation testing and marine acoustic insulation assessment with reference to applicable standards.
| Reference / Standard | Purpose |
|---|---|
| IMO Resolution MSC.337(91) | Code on Noise Levels on Board Ships |
| Chapter 6 of IMO MSC.337(91) | Acoustic insulation between accommodation spaces |
| ISO 717-1 | Rating of airborne sound insulation |
| ISO 10140-2 | Laboratory airborne sound insulation, where applicable |
| ISO 140-4 | Field airborne sound insulation, where applicable |
| IEC 61672-1 | Sound level meter specification |
| IEC 60942 | Acoustic calibrator specification |
| ABS Crew Habitability Guides | Acoustic comfort and habitability review |
| Location / Separation Type | Requirement |
|---|---|
| Cabin to cabin | Rw 35 dB |
| Corridor to cabin | Rw 30 dB |
| Cabin to cabin with communicating door | Rw 30 dB |
| Mess / recreation / public spaces to cabins and hospitals | Rw 45 dB |
| Assessment Area | Survey Focus |
|---|---|
| Cabin to Cabin | Cabin-to-cabin sound insulation survey |
| Corridor to Cabin | Corridor-to-cabin acoustic assessment |
| Cabin with Communicating Door | Sound transfer through connecting door |
| Mess Room to Cabin | Dining area noise transfer |
| Recreation Room to Cabin | Activity area noise transfer |
| Public Space to Cabin | Common area acoustic separation |
| Hospital / Sickbay | Privacy and acoustic comfort |
| Office Separation | Acoustic privacy between spaces |
The marine sound reduction index survey is conducted using suitable acoustic measurement equipment. Sound pressure levels are measured in the source room and receiving room to evaluate the acoustic insulation performance of the separating element.
Where required, results are assessed across frequency bands and converted into a single-number rating such as Rw or R’w.
Sound level meters are generally selected with reference to IEC 61672-1, and field verification is carried out using a suitable acoustic calibrator.
Rw testing refers to weighted sound reduction index assessment, commonly used to describe airborne sound insulation performance.
R’w testing refers to field-measured weighted sound reduction index. It reflects real on-board conditions and may be affected by flanking paths, gaps, door seals, penetrations, ventilation openings and workmanship.
| Point | Deck | Separation | Measured SRI | Required SRI | Result |
|---|---|---|---|---|---|
| A1 | 02 Deck | Cabin to cabin | Measured value | Required value | Pass / Review |
| A2 | 02 Deck | Corridor to cabin | Measured value | Required value | Pass / Review |
| A3 | Main Deck | Public space to cabin | Measured value | Required value | Pass / Review |
A professional sound reduction index survey report may include vessel particulars, survey objective, reference standards, methodology, source and receiving room details, separating element details, measured values, applicable criteria, result comparison, photographs, layout markings, conclusion and recommendations.
Recommendations may include improving door seals, sealing gaps and penetrations, upgrading acoustic doors, improving partition construction, reviewing ceiling and floor paths, treating ventilation openings, checking flanking noise paths and improving bulkhead insulation.
| Benefit | How It Helps |
|---|---|
| Supports Crew Rest | Reduces disturbance between spaces |
| Improves Privacy | Reviews sound insulation between cabins |
| Supports Habitability | Useful for accommodation comfort review |
| Identifies Weak Paths | Finds gaps, seals or partition weaknesses |
| Guides Improvement | Provides practical acoustic actions |
Our monitoring systems combine precision instrumentation, wireless communication,and cloud-based technology to deliver reliable and accurate environmental data in real time.
It assesses airborne sound insulation between selected vessel spaces.
It measures sound levels in source and receiving rooms to evaluate sound reduction through a separating element.
Cabin-to-cabin, corridor-to-cabin, public space-to-cabin, recreation room-to-cabin and hospital separation.
Rw testing describes weighted sound reduction index performance.
R’w testing reflects field-measured performance under real on-board conditions.
Yes. It can identify door gaps, poor seals, penetrations, ventilation paths and flanking transmission.
Yes. It supports handover, client acceptance, accommodation review and habitability assessment.
Contact Pro-Tec Geosystems Pte Ltd with vessel details, layout and survey scope.
Need On-Board Vessel Sound Reduction Index Survey Services in Singapore? Contact Pro-Tec Geosystems Pte Ltd for ship sound insulation testing, marine acoustic insulation assessment, vessel SRI survey, Rw testing, R’w testing and IMO MSC.337(91) acoustic insulation assessment support.