In some older buildings the above locations do not exist. Vibration maskers have been applied in a number of facilities. One application is use on top of a gypsum board ceiling; the entire gypsum panel becomes the speaker.

They have also been attached to air supply ducts, radiating masking through the air diffusers. In other cases, maskers were hidden above air ducts in open ceilings. Masking speakers have been placed under desks, under open office work surfaces, and behind paintings. The figure above shows a wall mounted masking speaker.