The Noise That Moves Upward Through the Vessel

In many marine environments, noise doesn’t just spread horizontally—it travels vertically.

Machinery operating below deck—such as generators, compressors, and propulsion systems—can produce 90–110 dB of low-frequency energy. Instead of staying contained, that energy moves upward through:

• Steel deck plates
• Structural beams and supports
• Floor and ceiling assemblies

What starts as equipment noise below deck becomes a persistent rumble felt and heard in upper living and operational spaces.

Why Vertical Noise Is Harder to Control

Structure-borne noise behaves differently than airborne sound.

• It travels through solid materials, not open air
• It bypasses traditional insulation methods
• Low-frequency vibration penetrates structural elements easily

This is why standard treatments often fail—they don’t address the transmission path inside the structure.

The Right Approach: Block the Path, Not the Air

To control deck-to-deck noise, you need to interrupt the transmission path within the structure itself.

Recommended System

MassiCore® Marine 135 (ANC-MB135)

• 2 lb mass loaded vinyl barrier for high-density blocking
• Designed for low-frequency, structure-borne noise
• Flexible for integration within deck and ceiling systems
• Suitable for demanding marine environments

Instead of treating the air, it blocks vibration before it reaches upper decks.

How It’s Installed

For effective performance, the system is integrated into structural assemblies:

• Installed within floor and ceiling systems
• Applied as part of a continuous acoustic barrier layer
• Combined with other materials in multi-layer assemblies
• Fully sealed to prevent vibration transfer paths

This creates a complete structural noise barrier across deck levels.

Measured Results in Marine Environments

With proper installation:

• Noise reduced from 100–110 dB to 65–70 dB
• Improved comfort in upper decks and crew areas
• Reduced vibration-related fatigue

Supports OSHA standards in Florida:

• 85 dB (Action Level)
• 90 dB (Permissible Exposure Limit)

Vertical noise transmission won’t stop on its own—it moves through the structure.

To control it effectively, you need:

• High-mass acoustic barrier
• Integration within structural assemblies
• Full compliance with OSHA standards

MassiCore® Marine 135 provides a proven solution for controlling structure-borne noise between decks in marine environments.