audience
audio electronics
auditorium
business
business meeting
center
chair
communication
conference
convention
convention center
corporate event
delegates
education
electrical equipment
equipment
event
group of people
hall
journalism
learning
lecture
lecturer
listeners
meeting
microphone
microphone stand
news
news conference
object
participants
people
presentation
press
press conference
public
public event
public meeting
public speaker
row
seat
seating
selective focus
seminar
sound
stage
table
university
unrecognizable person
visual