Pipe, duct, and wall soundmasker is used to protect pipes, ducts, and walls against human and electronic eavesdropping by filling them with full bandwidth soundmasking. The unit may be attached to exterior of any pipe or duct, whether square or round. It may also be attached to vertical surface of any partition wall. It is critical to securing of pipes and ducts when DIAM and DCID requirements for SCIF need to be met. It may be used to ensure eavesdropping protection of pipes and ducts that breach the perimeter of secure environment by resonating these penetrations, filling them with soundmasking and/or misinformation. Additionally, it resonates plane of any wall along perimeter of secure environment. When controlled by Dynasound’s DS102 series security generators and amplifiers, it also protects against sophisticated signal recovery techniques.