Conference System - Part Two




As I mention in the previous topic that Audio Conference System Is Divided into Three Main Systems according To the Method of Control of the direct Connection between chairman ans delegates as follows:

  1. Open Conference Systems.
  2. Partially Open Conference Systems.
  3. Controlled Conference Systems.

and I explain the open conference system in previous topic, now ,in this topic, I will continue explaining the other types of Conference systems as follows:


Partially Open Conference Systems: 


This System Is Suitable For Conferences with a Limited Number of Delegates to Speech Each Other but Under the Control of the Conference's Chairman.

 

The Sound Systems Permits Every Delegate To Speech To Other Delegates And Chairman Under The Control Of The Chairman So That The Chairman Can Switch Off The Speech Circuits Of The Talked Delegate And Other Delegates And Activate His Speech Circuit By switching On A Priority Button On His Unit.



Types of partially open Conference Systems: 



1- without internal and external broadcasting:
- In This Case Delegate Unit Contains:
  • Microphone 
  • Talk Button 
  • Internal loud speaker 
- And Chairman Unit Contains:
  • Microphone 
  • Talk Button 
  • Priority button 
  • Internal loud speaker 


2- With internal and external broadcasting:


In this type, the external broadcasting is provided by adding a remote loud speaker to different remote locations while the internal broadcasting is done by using one of the following methods:

The addition of Side Sound Columns in the conference Hall and in this case Delegate Unit Contains only the Microphone and Talk Button And Chairman unit contain only the Microphone , Talk Button and Priority button.

Or Providing the Delegates and Chairman Units with an Internal Speaker (Recommended) as in type #1.




Controlled Conference Systems: 


This System Is Suitable For Conferences With A Large Number Of Delegates To Speech Each Other But Under The Full Control Of The Conference's Chairman.

This System Is Used When Speech Between Delegates Is Not Desired So In This System The Chairman Has A Control Panel (Permission Keys) Which Contains A Large Number Of Push Buttons And Lamps According To Max. Number of the Conference Hall Seats.

And If Any Delegate Wants To Speech He Will switch On A request Button In His Unit Hence, His Lamp in The Chairman's Control Panel Switch On Then The Chairman switch On The permission Button (which is below the lamp) Of This Delegate So, The Delegate Can Talk To Others Until The Chairman switch off The Button Again To Switch Off The Speech Circuit Of This Delegate.




Types of Controlled Conference Systems:

1- without internal and external broadcasting: (see fig.1)

In This system we can monitor the conference by providing the Delegates and Chairman Units with an Internal Speaker.


 
fig (1)

- In This Case Delegate Unit Contains:
  • Microphone 
  • Request Button. 
  • Internal speaker. 

- And Chairman Unit Contains:
  • Microphone 
  • Permission keys control panel. 
  • Internal speaker. 


2- With internal and external broadcasting: (see fig.2)


In this type, the external broadcasting is provided by adding a remote loud speaker to different remote locations while the internal broadcasting is done by using one of the following methods:

 

fig (2)

The addition of Side Sound Columns in the conference Hall and in this case Delegate Unit Contains only the Microphone , and Request button And Chairman unit contain only the Microphone , Permission keys control panel.

Or Providing the Delegates and Chairman Units with an Internal Speaker (Recommended) as in type #1. (see fig.2)



Notes:
  • It can be useful to use one or more recorder to record the events of the conference. 
  • Delegates units may be connected all in series or each row is connected in series then the rows are connected to the power amplifier separately. 


in the next topic , i will begin explaining the basics of sound system design. please, don't miss the coming topics.



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