Soundmaskers are used to protect windows, walls and doors against human and electronic eavesdropping by applying full bandwidth soundmasking. The unit may be attached to interior side of any window, door or in some cases wall surfaces. In all applications integrity of surface remains intact. It is critical to securing of windows, doors and walls when DIAM and DCID requirements for SCIF need to be met. It is effective against laser eavesdropping techniques, as well as use of parabolic microphones. When controlled by Dynasound’s DS102 series security generators and amplifiers, it also protects against sophisticated signal recovery techniques designed to capture conversations buried within the soundmasking signal. Door maskers provide protection from intentional eavesdroppers by applying low-level sound masking to the door, filling the gaps around the door with protective sound. Dynasound window maskers provide protection from laser microphones or sensitive parabolic listening devices which can be aimed at windows from great distance.