Ch 15 - Distributed Paging Sys Flashcards Preview

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Flashcards in Ch 15 - Distributed Paging Sys Deck (12):
1

15–3 principles of design

types of patients systems =

(2)

 

* Centrally amplified systems

* Distributed amplified systems

2

15–7 sound pressure level (SPL)

Jet airplane takeoff =

 

Exceeds 100

3

15–7 sound pressure level (SPL)

Doctor's exam room =

 

55

4

15–7 sound pressure level (SPL)

Levels above 95 dB =

 

Unsuitable for paging except in extreme situations

5

15–8 loudspeaker

Paging =

 

10 DB above the ambient level

6

15–9 ceiling loudspeaker distribution patterns

Two most common loudspeakers =

 

* Hexagonal

* Square

7

15–9 ceiling loudspeaker distribution patterns

Hexagonal =

 

Preferred pattern

8

Fig 15.1

 

Hexagonal loudspeaker pattern

9

Fig 15.2

 

Square loudspeaker pattern

10

15–9 ceiling loudspeaker distribution patterns

Distance between ceiling loudspeaker =

 

Twice the ceiling height

11

15–10 wall-mounted loudspeakers

One loudspeaker =

 

600 ft.²

12

15–10 hallway loudspeakers

Heavy traffic hallways =

Normal traffic always =

 

*8 ft

* twice the ceiling height minus the listener ear height