On board experiments concerning noise and vibration in training ship 'taiseimaru' for ten years

The vibration isolation effect of rockwool type floating floor set up in a training ship was measured for ten years to know the Vibration durability of rockwool. The floating floor could maintain the vibration isolation ability not less than the value at the construction time after ten years. The life of rockwool used in a floating floor in a ship might be estimated more than 100 years, considering the on board experiments and a fatigue acceleration test of rockwool by a vibration testing machine.