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2. Megaphone - Wikipedia

   en.wikipedia.org/wiki/Megaphone

   An electric megaphone is a handheld public address system, an electronic device that amplifies the human voice like an acoustic megaphone, using electric power. It consists of a microphone to convert soundwaves into an electrical audio signal , an amplifier powered by a battery to increase the power of the audio signal, and a loudspeaker to ...

3. Horn loudspeaker - Wikipedia

   en.wikipedia.org/wiki/Horn_loudspeaker

   A horn loudspeaker is a loudspeaker or loudspeaker element which uses an acoustic horn to increase the overall efficiency of the driving element(s). A common form (right) consists of a compression driver which produces sound waves with a small metal diaphragm vibrated by an electromagnet, attached to a horn, a flaring duct to conduct the sound waves to the open air.

4. Long-range acoustic device - Wikipedia

   en.wikipedia.org/wiki/Long-range_acoustic_device

   An NYPD LRAD on top of a police humvee An LRAD operator wearing hearing protection LRAD on a navy ship. A long-range acoustic device (LRAD), acoustic hailing device (AHD) or sound cannon is a specialized loudspeaker that produces sound at high power for communicating at a distance.

5. Trump laughs off the idea that Elon Musk is usurping him ...

   www.aol.com/news/trump-addresses-elon-musks...

   Musk, who owns the social media site X, posted more than 100 times about his objections to the original spending deal — a preview of how he may use his influence and his megaphone to shape ...

6. The last time Trump took a ‘DJT’ business public, it ended up ...

   www.aol.com/last-time-trump-took-djt-213345737.html

   DJT, of course, stands for Donald John Trump, underscoring the company’s raison d’etre — giving a megaphone (and a serious cash infusion) to the presumptive Republican nominee. The company ...

7. Public address system - Wikipedia

   en.wikipedia.org/wiki/Public_address_system

   A woman using a small handheld electric megaphone at a demonstration in Portugal. Electric megaphones use a type of horn loudspeaker called a reflex or reentrant horn. In the 1960s, an electric-amplified version of the megaphone, which used a loudspeaker, amplifier and a folded horn, largely replaced the basic cone-style megaphone.