Delegate at a conference on the environment public speaking, London, England.

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Photo credit: © Paul Doyle / Alamy / Afripics
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Keywords: acoustic, acoustics, conference, delegate, environment, environmental, front, grasp, hold, indoor, london, male, man, mic, microphone, overview, public, rhetoric, rhetorical, roving, sound, speak, speaker, speaking, speech, talk, travel, travelling, uk, view