ASM-2480 Loudspeaker Masker

The ASM-2480 Loudspeaker Masker is used to create audio security within rooms that are required to have loudspeakers driven from locations outside the secure area. (please read below)

Features

* Puts masking sound into loudspeakers or horns
* Does not interfere with loudspeaker operation
* Lightweight and easy to install
* Easily inspected
* Can be driven with standard masking equipment
* Does not require a separate transformer

General Applications

The ASM-2480 Loudspeaker Masker is used to create audio security within rooms that are required to have loudspeakers driven from locations outside the secure area. Typical situations of this type are emergency evacuation horns or emergency paging speakers in either owned or leased space.

Since loudspeakers can function as microphones, the presence of these speakers within a secure room permits the possibility of audio surveillance. When conversations are held in the room, the sound pressure of the speech causes the loudspeaker diaphragm to move slightly. This results in a small voltage fluctuation in the speaker wire, which can be detected outside the secure area and resolved into speech. The ASM-2480 Loudspeaker Masker is placed directly above, and emits masking sound directly into the speaker and is set at sufficient level to mask all conversations. It is a lightweight unit that is attached easily to the horn or speaker. Since the unit is small, it does not interfere with the normal functioning of the speaker.

Meets DIAM and DCID requirments for SCIF.

The ASM-2480 Loudspeaker Masker may also be used to provide audio security in secure rooms that have small openings to other rooms. This opening may be for return air, but it may also be for document passing. Such openings are not recommended, as the level of the masking sound must be relatively high in order to assure audio security. The ASM-2480 is critical to the securing of a Public Address or intercom system, (PA system) when DIAM and DCID requirement for SCIF need to be meet.