So far, Malinau residents have used the ballroom/multipurpose hall called “Tebengang” which is located at the Malinau sub-district office. However, users often make complaints in the form of echoes and echoes that occur in the room when used. Mr. Daniel Trimanto as a technical consultant trusted by the regent was ordered to find a solution to the problem. After conducting a comparative study between several acoustic consultants in Jakarta, they chose ALTA Integra to use Acourete’s product to solve their problem.