A voice amplifier is a device used to increase the volume of a person's voice. The most common solutions for this are a Mike (4 letters), MICROPHONE (10 letters), Mic (3 letters), MEGAPHONE (9 letters) and BULLHORN (8 letters). A Mike is a small, handheld device that is held close to the mouth to amplify the sound of the speaker's voice. A MICROPHONE is a device that converts sound into an electrical signal. A Mic is a shortened version of the word MICROPHONE. A MEGAPHONE is a cone-shaped device that amplifies sound when it is spoken into. A BULLHORN is a type of MEGAPHONE that is usually handheld and has a loud, powerful sound.