Ch. 15 (Paging) Flashcards Preview

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

Jet airplane takeoff

A

Exceeds 100 dB

1
Q

Types of paging systems

A

Centrally amplified

Distributed amplified

2
Q

Levels above 95 dB

A

Unsuitable for paging

except in extreme situations

3
Q

Ceiling loudspeaker distribution patterns:

A

Hexagonal

Square

4
Q

General rule: one loudspeaker for every ___

A

600 sq’

5
Q

Hallway speaker placement

A

On center @ 8’ intervals

6
Q

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

A

Bi-directional wall mounts on alternating sides

7
Q

Wall-mounted speakers

A

8’-12’ AFF

8
Q

Separation between speakers

A

Twice the ceiling height

9
Q

A properly designed system should be ___ DB above ambient noise

A

10 dB

10
Q

Ambient noise level of a doctors office

A

55 dB

11
Q

Two most commonly used voltages

A

25 V & 70 V

12
Q

Speakers are rated at 3.3’ using ___ of power input

A

1 watt