
Turning Point
Good for Education Bad for Event Production

Turning Point
Good for Education Bad for Event Production
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Posted in Audience Response, AV Department, Hire, Presentation Tips, Voting
Tagged Audience Response, Voting Keypads
What is a discussion microphone? How is it different from a conventional microphone? Mark Kisby explains…
Commonly referred to as a discussion microphone, delegate microphone, conference microphone, or Push to Talk. This type of microphone is used as part of a larger system of microphones where the use of a conventional microphone is impractical.
What makes a discussion microphone different to a conventional microphone is typically a discussion microphone will have a built in pre-amp, this allows for an installation that ‘daisy chains’ the microphones in series and sending the audio along a common ‘bus’. The conventional microphone as used for music or recording has no pre-amp instead this is contained in a sound desk or mixer. This conventional arrangement requires individual cables to be run from the sound desk to each microphone. The discussion microphone is usually enclosed in a table top enclosure that houses the microphone, pre-amp, an on /off button, and possibly an amplifier with a small ‘personal’ speaker.
Both types have different applications, conventional microphones are used for music (both in live sound, recording) and in speech applications where individual tonal / gain controls are required. i.e. lectern or top table. Discussion microphones are used for situations of extended speech reinforcement applications ie. Conferences, Board rooms, Council Chambers, Parliaments, etc… With these applications in mind a discussion microphone system has features which are unique to its type.
Designed to allow the orderly control of a meeting, these features include:- Push to talk (PTT) on /off microphone activation switch to allow delegate operation. A microphone mounted light to show the microphones status, not only the user but also other delegates / chairman. A limit on the number of microphones that can be ‘live’ at any one time is applied, typically 6-8 microphones, to prevent too many microphones becoming live and causing feedback (howling speakers).
The limiter is normally adjustable to various modes of operation including ‘Automatic’ where delegates switch ‘on’ and ‘off’ their microphones at will. The ‘Manual’ mode is where delegates ‘request to speak’ and their microphone is made live by the chairman or a technician when it is their turn to speak. Another feature is the ability of a chairman’s or president’s microphone to over ride all others.
Discussion microphones connect via a ‘daisy chain’ cable network that puts the microphones in series running back to a central controller. The controller outputs a single audio connection which allows up to a hundred microphones to be connected to just a single audio input on a sound desk or amplifier. More modern digital systems may make use of common cable types such as Cat5, some systems may use a proprietary cable which is unique to the system and can add greatly to the cost of an installation.
The daisy chain cable arrangement suited the traditional table layouts of board rooms and council chambers however this has now developed in to wireless models which allow the use of these systems easily in a cabaret table style arrangement. Wireless systems also allow for the installation of such a system in a listed building where a cabled installation would be invasive or where a room needs to be multi purpose requiring the easy removal and re-installation of the equipment.
Control of the system is by a chairman’s unit or a comprehensive technicians control panel which allows full remote control of all microphones.
I hope this helps explain this type of microphone. Look out for another post soon on how these microphones are used in simultaneous interpretation systems.
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Posted in Audio, AV Department, Hire, Presentation Tips, Simultaneous Interpretation
Audience response systems can add a great deal of value to your conferences and events. Mark Kisby explains how…
During the recent ‘Credit Crunch’ organisations were under pressure to cut their conferences and events budgets. What they saved by reducing the size of the stage or by going to a cheaper venue shouldn’t have effected the basic content of the day or the goals for staging the event in the first place. Audience response systems (ARS) were often cut early in the budget review but this can be a mistake as an audience response system will add tremendous value by giving tangible results and feed back from delegates attending.
An ARS can show whether or not the key the aims of staging an event have been met or not, it can reveal any sticking points. This allows your event to measure its effectiveness during the day and give evidence of its success to all the stakeholders.
Audience response can also maximise the available time at an event by asking delegates which themes are of most interest, so allowing you to apportion time appropriately. It costs a lot to get every one in one place so it makes sense to ensure their time together is as productive as possible.
Using these systems also sends a clear message to the attendees, that ‘we are listening and your opinion is valued’. Presenters in the dreaded post lunch grave yard slot will appreciate the regenerative powers of asking a flagging delegate a question on which they need to ponder before responding. ARS has been proven to increase retention on the subject polled and certainly your chair person will marvel at the ARS’s capability to break the ice during Q&A sessions and promote delegate interaction as they begin to discuss options with their neighbour, so leading to improved networking.
Asking post event evaluation questions at the end of the last session will save your staff days of data input from a paper based questionnaire.
So how do they work? In its basic form an audience response system comprises of a display to present the question and a range possible options / answers, and a ‘keypad’ to allow the delegate to select the option / answer which best matches their opinion.
The results of the poll are displayed immediately after the close of the 10 second voting slot. The equipment is usually radio based and wireless so allowing free distribution amongst an audience.
Some systems also offer the ability to communicate directly with the presenter through the ’free text submission’ of questions so allowing the delegate to ask their own question, or submit an idea, rather than just responding to predetermined options.
All in all if the budget is being trimmed it pays not to cut the one item that can prove the days effectiveness and show value has been obtained for the spend. If you are still looking for ways to save, go for the cheaper dessert option, cut the sparkling water and have a smaller lighting rig!
AVD can supply a range of Audience Response Systems including:-
Voting Keypads
Mini Voting Keypads
Deletext – SMS
Deletext – Engage
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Posted in Audience Response, AV Department, Deletext, Hire, Presentation Tips, SMS, Voting