<p>The demand for enhanced passenger comfort on cruise ships has increased, emphasizing the need to reduce excessive vibrations that affect both onboard livability and environmental noise emissions. Structural vibrations contribute significantly to underwater radiated noise, making vibration control a key challenge. This study develops a method to analyze vibration propagation and identify individual source contributions to ship responses. Proper characterization of transfer mechanisms between sources and receivers is essential for effective vibration control, minimizing negative effects, and improving onboard comfort. The approach helps pinpoint critical sources and optimize their isolation by refining hull interfaces and energy transfer paths. After reviewing existing techniques, a methodology for source contribution analysis is proposed and applied to a cruise ship with dual electric propulsion engines and propellers. The study employs insertion loss functions to experimentally quantify vibration transmission between sources and target locations. The findings support optimized vibration control strategies, leading to improved passenger comfort and reduced underwater noise.</p>