AUDIO

A system of records/signals either verbal or musical or direct transmission over a Public AddressSystem to advise staff and other occupants of emergency conditions and the action to befollowed.

In special occupancy premises e.g. hospitals, cinemas, an agreed sound signal may be broadcast to give early warning to staff of emergency conditions which may or may not necessitate action by them at that time.

The power supply to the sound system should be from essential circuits.

VISUAL

A system of coloured and flashing lights, which may be incorporated to the Exit Signs and Directional Signs as required under 5.10 and supplemented by low-level Directional Signs to indicate:

( a ) the floor/floors to be evacuated by operating the lights on that floor/those floors in flashingmode,
( b ) the evacuation routes by following the low-level Directional Signs.

Low level directional signs shall be of self luminous types and conform to British Standard 5499: Part 2 or, alternatively, shall be of photoluminous types and conform to DIN 67510 Part 4 or equivalent.

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