Image: Wikimedia Commons

megaphone

Electroacoustic handheld device for amplifying the voice

Also known as mega phone · bullhorn · loudhailer · loud hailer

Instance of: product category
1
Sources
1.Stated in Google Product Taxonomy
View statement on Wikidata ↗
Subclass of: audio electronics
, horn loudspeaker
, audio recording
1
Sources
1.Stated in Google Product Taxonomy
View statement on Wikidata ↗

Overview

From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0

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.

Overview

All data

35 statements · 14% with external sources · numbers in brackets are citations

Unicode character: 🕫
📣
Members / parts: microphone
loudspeaker
Different from: loudspeaker
audio amplifier
horn loudspeaker
public address loudspeaker
handset
speaking horn
Name: Megaphon

On other databases

19 identifiers linking megaphone across the web's reference databases

Data quality

statements

14%

externally sourced

Source last edited September 11, 2026. AIDb refreshes this page daily.

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AIDb. (2026). megaphone (Q216217). Retrieved from https://aidb.si/e/megaphone-Q216217