This video is about noise and vibration on yachts and why it is important to reduce it. Noise is defined as an unwanted, disturbing or loud sound, while vibration is a periodic movement of particles of an elastic body or medium in alternating opposite directions. Both can be undesirable and affect the safety and comfort of passengers and crew. The main sources of noise and vibration on boats are engines, air conditioning systems, and waves. There are different types of noise and vibration that can vary in frequency and intensity. There are also different types of isolators and absorbers that can be used to reduce these effects. Reducing noise and vibration on boats not only has an impact on comfort, but also on the safety of passengers and crew.