announcement
audience
audio equipment
auditorium
backgrounds
blue
broadcasting
classroom
closeup
communication
convention center
copy space
defocused
discussion
education
equipment
event
focus on foreground
group of people
indoors
learning
lecture hall
macro
message
metal
microphone
microphone stand
musical instrument
musician
performance
performance space
performer
performing arts event
popular music concert
presentation
press conference
public speaker
selective focus
seminar
singer
singing
speaker
speech
stage
stage theater
talking
teaching
technology
theatrical performance