Noise-insulation for engines
Engines are often the main source of noise in vehicles, ships and machines, among others. They are also challenging noise sources to develop a solution for. Engines become hot, need oxygen (in the case of an internal combustion engine) and are built into vehicles or machines as compact as possible. From an acoustic point of view, changing the engine speed is also a challenge, where especially the lower frequencies (e.g. in a boat, or when stationary) can lead to an annoying humming and even vibrations.