Great Lakes Sound & Vibration (GLSV) is a company that designs and manufactures engineered exhaust systems. Its products include cooling ducts, engine mount systems, ship service diesel generator (SSDG) silencers, mufflers, etc. The company also provides noise, vibration, and harshness (NVH) analysis and testing, system modeling, simulation, predictive maintenance, structural analysis, and other services. GLSV caters to the defense, maritime, and navy sectors.