A megaphone, speaking-trumpet, bullhorn, blowhorn, 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.
Posts about Bullhorn
  • Why Your Brand Should Speak Human

    … Maybe this is a familiar scenario. You’ve launched your content marketing strategy but it’s not working – few fans, even fewer followers, some light traffic to your blog, and a few lonely clicks from various calls-to-action. When you listen for the response, you hear nothing but crickets. Why? Perhaps you forgot to leave your bullhorn…

    Content Marketing Institutein Social YouTube- 18 readers -
  • Social Reach: Put Your Money Where Your Mouth Is

    Brands on social media are getting super competitive. Who doesn’t want to be associated with the next Ellen-Selfie Oscars phenomena? In 2014, most brands “get it.” They know their audience is on social media and that they need to be on it. The competition is fierce, as more and more content is being produced in attempt to reach the same eyeballs.

    Adrienne Sheares/ Vocus Blog- 13 readers -
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