There are many types of audiovisual technology that need to be used at conferences. Here are two specific kinds of tech that can make a conference more enjoyable and informative for those in attendance.
A projector and a projector screen
At most conferences, there are a number of guest speakers, as well as some keynote speakers, who are tasked with giving lengthy talks on the subject or industry that the event centres around. Two pieces of audiovisual technology that can be of great use to these individuals are a projector (which casts images or text from a laptop's slideshow file onto a surface) and a projector screen (which serves as the surface for the aforementioned images).
The reason for this is that no matter how fascinating and knowledgeable a speaker is, the people listening to them may struggle to concentrate on what they are saying if they talk for a long period of time without using any visual accompaniments in the form of projected images. The use of a projector and screen could help the audience to focus for longer and make the topics the speaker discusses easier for them to digest.
Furthermore, if a speaker is discussing a particularly complex matter, it will be much easier for them to convey their complicated ideas to their audience in a way that enables them to understand it with the help of a digital slideshow that features things like graphs, flowcharts and animated images.
Another type of audiovisual technology that could be enormously useful to many people involved in a conference is the lapel microphone. As the term itself implies, this is a compact microphone that can be clipped onto the lapel of a person's jacket. Whilst larger, handheld microphones can be useful in certain situations, lapel microphones are particularly well-suited for use at conferences.
For example, the use of this type of microphone by guest and keynote speakers can allow them to use their hands to operate the aforementioned projector and laptop whilst continuing to converse with and be heard by the audience. This can help them to avoid long, awkward pauses throughout their speeches during moments when they need to change the images on their slideshow or fix any laptop issues they are experiencing.
Additionally, it can allow them to use more hand gestures to express themselves whilst they are speaking because they won't have to hold a microphone. These gestures can serve as an additional form of communication that can help them to clarify the points that they are making.