Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Megaphone> ?p ?o }
- Megaphone abstract "A megaphone, speaking-trumpet, bullhorn, or loud hailer is a portable, usually hand-held, cone-shaped acoustic horn used to amplify a person’s voice or other sounds and direct it in a given direction. The sound is introduced into the narrow end of the megaphone, by holding it up to the face and speaking into it, and the sound waves radiate out the wide end. The megaphone increases the volume of sound by increasing the acoustic impedance seen by the vocal cords, matching the impedance of the vocal cords to the air, so that more sound power is radiated. It also serves to direct the sound waves in the direction the horn is pointing. It somewhat distorts the sound of the voice because the frequency response of the megaphone is greater at higher sound frequencies. Since the 1960s the voice-powered acoustic megaphone described above has been replaced by the electric megaphone, which uses electric power to amplify the voice.".
- Megaphone thumbnail MOHAI_-_firefighters_speaking_trumpet_01A.jpg?width=300.
- Megaphone wikiPageExternalLink Controlling+public+protest%3a+First+Amendment+implications.-a016473804.
- Megaphone wikiPageID "211684".
- Megaphone wikiPageLength "12900".
- Megaphone wikiPageOutDegree "62".
- Megaphone wikiPageRevisionID "645960805".
- Megaphone wikiPageWikiLink Acoustic_impedance.
- Megaphone wikiPageWikiLink Amplifier.
- Megaphone wikiPageWikiLink Athanasius_Kircher.
- Megaphone wikiPageWikiLink Audio_signal.
- Megaphone wikiPageWikiLink Austrians.
- Megaphone wikiPageWikiLink Battery_(electricity).
- Megaphone wikiPageWikiLink Bugle.
- Megaphone wikiPageWikiLink Category:Audio_amplifiers.
- Megaphone wikiPageWikiLink Cecil_B._DeMille.
- Megaphone wikiPageWikiLink Cheerleading.
- Megaphone wikiPageWikiLink Demonstration_(protest).
- Megaphone wikiPageWikiLink Extra_(acting).
- Megaphone wikiPageWikiLink FBI_Law_Enforcement_Bulletin.
- Megaphone wikiPageWikiLink Federal_Bureau_of_Investigation.
- Megaphone wikiPageWikiLink Frequency.
- Megaphone wikiPageWikiLink Frequency_response.
- Megaphone wikiPageWikiLink Horn_(acoustic).
- Megaphone wikiPageWikiLink Horn_loudspeaker.
- Megaphone wikiPageWikiLink Impedance_matching.
- Megaphone wikiPageWikiLink Lifeguard.
- Megaphone wikiPageWikiLink Logic_Pro.
- Megaphone wikiPageWikiLink Long_Range_Acoustic_Device.
- Megaphone wikiPageWikiLink Loudspeaker.
- Megaphone wikiPageWikiLink Microelectronics.
- Megaphone wikiPageWikiLink Microphone.
- Megaphone wikiPageWikiLink Papier-mâché.
- Megaphone wikiPageWikiLink Phonograph.
- Megaphone wikiPageWikiLink Pistol_grip.
- Megaphone wikiPageWikiLink Pom-pom.
- Megaphone wikiPageWikiLink Pro_Tools.
- Megaphone wikiPageWikiLink Public_address_system.
- Megaphone wikiPageWikiLink Radio_advertisement.
- Megaphone wikiPageWikiLink Samuel_Morland.
- Megaphone wikiPageWikiLink Set_construction.
- Megaphone wikiPageWikiLink Sound.
- Megaphone wikiPageWikiLink The_King_of_Kings_(1927_film).
- Megaphone wikiPageWikiLink The_Ten_Commandments_(1956_film).
- Megaphone wikiPageWikiLink Thomas_Edison.
- Megaphone wikiPageWikiLink Transistor.
- Megaphone wikiPageWikiLink University_of_Minnesota.
- Megaphone wikiPageWikiLink Vacuum_tube.
- Megaphone wikiPageWikiLink Vocal_folds.
- Megaphone wikiPageWikiLink Voice_projection.
- Megaphone wikiPageWikiLink File:Fotothek_df_tg_0008336_Akustik_%5E_Schall_%5E_Sprachrohr_%5E_Ordensliteratur.jpg.
- Megaphone wikiPageWikiLink File:HPIM0145_megaphone.jpg.
- Megaphone wikiPageWikiLink File:MOHAI_-_firefighters_speaking_trumpet_01A.jpg.
- Megaphone wikiPageWikiLink File:Movie_director_template.gif.
- Megaphone wikiPageWikiLinkText "Megaphone".
- Megaphone wikiPageWikiLinkText "Sengerphone".
- Megaphone wikiPageWikiLinkText "bull horns".
- Megaphone wikiPageWikiLinkText "bullhorn".
- Megaphone wikiPageWikiLinkText "bullhorns".
- Megaphone wikiPageWikiLinkText "loudhailers".
- Megaphone wikiPageWikiLinkText "megaphone".
- Megaphone wikiPageWikiLinkText "small megaphones".
- Megaphone wikiPageWikiLinkText "speaking-trumpet".
- Megaphone align "center".
- Megaphone align "right".
- Megaphone caption "A sailor using a megaphone to amplify the sound of a bugle to wake recruits at an American training camp in 1947".
- Megaphone caption "Austrian jazz singer using megaphone, 2007".
- Megaphone caption "German lifeguard with megaphone, 1969".
- Megaphone caption "German soldier using a megaphone to command troops, 1930".
- Megaphone caption "Man using megaphone with separate microphone".
- Megaphone caption "The EM-202 made by TOA Corp., the first transistorized handheld megaphone".
- Megaphone caption "Waist-slung megaphones with separate microphones".
- Megaphone direction "horizontal".
- Megaphone footer "' Woman using a handheld electric megaphone at a demonstration in Portugal. ' Electric megaphones use a type of horn loudspeaker called a reflex or reentrant horn. The sound waves travel in a zigzag path through concentric widening ducts .".
- Megaphone image ""Geração à Rasca" Demonstration.jpg".
- Megaphone image ""Getting em up" at U.S.Naval Training Camp, Seattle, Washington. Webster ^amp, Stevens. - NARA - 533698.tif".
- Megaphone image "Bundesarchiv Bild 102-10044, Reichswehr-Manöver.jpg".
- Megaphone image "Bundesarchiv Bild 183-H0729-0035-001, Berlin, Freibad Pankow, Bademeister.jpg".
- Megaphone image "Knut Marius Gaarder.jpg".
- Megaphone image "Reflex loudspeaker animation 2.gif".
- Megaphone image "Riverside Stompers - Wolfgang Straka 2007 e.jpg".
- Megaphone image "Seattle Hempfest 2007 - Dominic Holden.jpg".
- Megaphone image "電気メガホンEM-202.JPG".
- Megaphone width "107".
- Megaphone width "120".
- Megaphone width "132".
- Megaphone width "150".
- Megaphone width "174".
- Megaphone width "190".
- Megaphone width "200".
- Megaphone width "205".
- Megaphone width "235".
- Megaphone wikiPageUsesTemplate Template:About.
- Megaphone wikiPageUsesTemplate Template:Commons_category_inline.
- Megaphone wikiPageUsesTemplate Template:Multiple_image.
- Megaphone wikiPageUsesTemplate Template:Redirect.
- Megaphone wikiPageUsesTemplate Template:Reflist.
- Megaphone subject Category:Audio_amplifiers.
- Megaphone hypernym Portable.
- Megaphone type RecordLabel.