About Us

Silent Line is founded in 2001 however the experience of Sjaak van Cappellen founder of Silent Line goes back to early 1980.
The core of Silent Line is to offer the market Innovative Engineering based Services and Solutions for Marine | Industrial and Transportation segment.
Prior to Silent Line Sjaak van Cappellen was working with his father Willem van Cappellen. At that time early 1980 the company Noise and Vibration Control (NVC) was the first company in the world offering engineering based solutions for the Marine Yachting Segment.

Sjaak van Cappellen with the knowledge from the past extended the Services offering the market Engineering based Innovative One Stop Shopping Packages with guaranteed low noise and vibration levels. This means that Silent Line offers

Engineering | Products and System supply and Supervision and Training.

This in our opinion was needed in order to bring us to the next level achieving stunning results related to noise and vibration control
The team of Silent Line contains mainly high skilled noise and vibration engineers related to

  • Finite Element Analysis
  • Statistical Energy Analysis
  • AutoCAD
  • Field Engineers performing Survey and Trouble Shooting
  • Consultants

Our team is supported by Marketing and After Sales experts looking after our clients and the market as we are looking for long-term relationships with our existing clients and new clients.


  • International Award related to SuMarine and Numarine

  • International Award related to SuMarine

  • International Award related to Burger Boat Company (MIRGAB V)

  • International Award related to Versil Craft Motor Yacht