Typical locations for concealing electronic listening devices include:

HVAC Ducts.Hiding a small bug in the HVAC ducts allows the listening devise to record conversations up to 4 or 5 offices away.

Walls, Bugs can be positioned on a wall (above or below ceiling grid), in the wall, under a picture hanging on the wall, behind a sofa, or chair pushed up against the wall, under a electrical switch plate cover, in an electrical outlet duplex, in a plant next to the wall, or many other locations.

Doors, Placing a bug on the door, or on a trash receptacle by a door allows for recording conversations through the door.

Sprinkler pipe/Gas Pipe, Tapping a bug on a pipe above the ceiling allows for the human speech frequencies vibrating on the pipe to be sent to a remote location where a computer can process them into intelligible conversation.

Conduit, Sliding a bug through conduit from floors away can locate the bug in an ideal location for listening to conversations.

Under raised floors, Sliding a bug from one room to another under the raised floor is an extremely easy and effective way to capture conversations.

Above the Ceiling, Weather a ceiling is metal, tin, hardboard, plaster, or an acoustical lay-in panel grid system, Hiding a bug, or sliding a bug from one room to another is another extremely easy way to capture conversations.

Paging & intercom system speakers, A paging speaker is essentially a diaphragm. As human speech from within the room travels to the paging speaker located on the ceiling, it vibrates the speakers and sends the voice back through the speaker wire, in the reverse direction. Tapping into that wire allows the conversations from that room to be captured from anywhere the wire is located.

Listening devices, or bugs, have become so technically advanced that sweeping for these bugs has nearly become impossible.

The experts at American Sound Masking offer state-of-the-arts Electronic Surveillance Countermeasures to protect these main breach points.