Final answer:
An audiovisual (A/V) professional in the theatre industry handles sound and video equipment during live performances, enhancing the audience's experience. They may use microphones to amplify actors' voices and play music to underscore scenes.
Step-by-step explanation:
An audiovisual (A/V) professional in the theatre industry is responsible for handling sound and video equipment during live performances. They ensure that the sound and video elements of the production run smoothly and enhance the audience's experience. For example, in big venues or musicals, microphones are often used to amplify the actors' voices, and music is played to underscore scenes. The A/V professional may also work in the booth, operating technical elements during the performance.