Socrates (c.470-399 BC), Ancient Greek philosopher, credited with introducing a new and critical attitude in philosophy and science. He was said to be the wisest of all men, but having been convicted of neglecting the city gods and corrupting the youth of
By: NYPL/Science Source
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Rear view of man public speaking at podium
By: Gary Waters
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A man talking to a group of people
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Young Adult Couples at the Garden Party, Illustrative Technique
By: DAJ
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a business man standing on a soap box shouts through a megaphone toward a group of empty chairs
By: Rubberball/Clark Dunbar
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Illustration, man holding clipboard and speaking into loudspeaker, side view.
By: Dorling Kindersley
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Man standing with his arms outstretched with people clapping in front of him
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Business Icons | Mono Series
By: Scott Dunlap
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Loudspeaker
By: Eastnine Inc.
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Person standing at a podium and giving a speech to three people
By: Fotosearch
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Michigan, 1906, Marlette Township, Charleston, Forester, Speaker, Sanilac County
By: Historic Map Works LLC
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A man with his hands tied by his tongue
By: Alberto Ruggieri
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Business Presentation
By: CTR design LLC
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Boombox
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Graduate Giving a Speech
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Boombox on Yellow Background
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Bright Music background
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Booker Washington, George W. Carver and Harriet Tubman. George Washington Carver (c. 1864 - c. 1943), was an American botanist and inventor who revolutionized agriculture practices in the Southern US. Booker T. Washington (1856-1915) was a writer and leade
By: NYPL/Science Source
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Abstract gray sphere surrounded by circles
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A rainbow of music
By: Muriel Frega
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Digital illustration of loudspeaker
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Businessman standing at a podium with his arm raised
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A Businessman Giving Presentation
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Michigan, 1906, Speaker Township, Speaker, Sanilac County
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Computer robot
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Colorful music
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Businessman with loudspeaker head and x-ray view of spine and lungs
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A gramophone
By: Dean Stanton
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Illustration of radio transmission and reception, from microphone to speaker