Audiovisual (AV) means possessing both a sound and a visual component, such as slide-tape presentations, films, television programs, church services and live theater productions.
Audiovisual service providers frequently offer web streaming, video conferencing and live broadcast services.Computer-based audiovisual equipment is often used in education, with many schools and universities installing projection equipment and using interactive whiteboard technology.
Another audiovisual expression is the visual presentation of sound (visual music).