The energy supply deficit in Chile since late nineties has forced critical buildings and factories to support their self-energy supply by means of diesel or gas genset based power plants. Many of these plants are indoors, located near community or are movable type for rental, so the acoustic issues to meet legislation or comfort standards has been an important matter to solve. This has led to a great development of solutions and products for the professionals and companies dedicated to noise control in our country. From the early developments, based on empirical or trial and error solutions, the noise control industry has enhanced its tools and knowledge. This presentation shows our approach of the noise control solutions, using products developed by our company, and case studies of our experience in: hospitals (Hospital Militar de La Reina, located in Santiago, with two power rooms and eight 1000 KW gensets, acoustic performance of 78 dBA@3ft);, data centers (Data Center HP, located in Paine, with three enclosures for 2000 KW genset transported to site with the gensets inside, acoustic performance of 75 dBA@4 ft); and commercial constructions (Costanera Center, located in a commercial zone in Santiago, involved three towers, one of these 1000 ft high, and a shopping center, powered with eight genset 2400 KW each, acoustic performance of 50 dBA@166ft).