Tradução e análise de palavras por inteligência artificial ChatGPT
Nesta página você pode obter uma análise detalhada de uma palavra ou frase, produzida usando a melhor tecnologia de inteligência artificial até o momento:
- como a palavra é usada
- frequência de uso
- é usado com mais frequência na fala oral ou escrita
- opções de tradução de palavras
- exemplos de uso (várias frases com tradução)
- etimologia
O que (quem) é megaphone - definição
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![Page from the [[Codex canadensis]], by [[Louis Nicolas]], circa 1675 to 1682, showing a native North-American chief using a megaphone made of bark](https://commons.wikimedia.org/wiki/Special:FilePath/Codex canadensis, p. 14.jpg?width=200 "Page from the [[Codex canadensis]], by [[Louis Nicolas]], circa 1675 to 1682, showing a native North-American chief using a megaphone made of bark")
![Silent film director [[D. W. Griffith]] using megaphone in 1922](https://commons.wikimedia.org/wiki/Special:FilePath/David Wark Griffith - 1922 2.jpg?width=200 "Silent film director [[D. W. Griffith]] using megaphone in 1922")
![Drawing by [[Athanasius Kircher]], 1684, shows man ''(left)'' using megaphone to communicate over distance](https://commons.wikimedia.org/wiki/Special:FilePath/Fotothek df tg 0008336 Akustik ^ Schall ^ Sprachrohr ^ Ordensliteratur.jpg?width=200 "Drawing by [[Athanasius Kircher]], 1684, shows man ''(left)'' using megaphone to communicate over distance")
![A late 19th-century speaking trumpet used by [[firefighter]]s](https://commons.wikimedia.org/wiki/Special:FilePath/MOHAI - firefighter's speaking trumpet 01A.jpg?width=200 "A late 19th-century speaking trumpet used by [[firefighter]]s")
Wikipédia
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A megaphone, speaking-trumpet, bullhorn, blowhorn, or loudhailer is usually a portable or 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. A 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 a microphone, an electrically-powered amplifier and a folded horn loudspeaker to amplify the voice.
