Ch. 15 (Paging) Flashcards Preview

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Flashcards in Ch. 15 (Paging) Deck (13)
0

Types of paging systems

Centrally amplified
Distributed amplified

1

Jet airplane takeoff

Exceeds 100 dB

2

Levels above 95 dB

Unsuitable for paging
(except in extreme situations)

3

Ceiling loudspeaker distribution patterns:

Hexagonal
Square

4

General rule: one loudspeaker for every ___

600 sq'

5

Hallway speaker placement

On center @ 8' intervals

6

If ceiling speakers aren't possible in hallways, use ___

Bi-directional wall mounts on alternating sides

7

Wall-mounted speakers

8'-12' AFF

8

Separation between speakers

Twice the ceiling height

9

A properly designed system should be ___ DB above ambient noise

10 dB

10

Ambient noise level of a doctors office

55 dB

11

Two most commonly used voltages

25 V & 70 V

12

Speakers are rated at 3.3' using ___ of power input

1 watt