The term EMCEE'S LAPEL ATTACHMENT can be solved by the three letter word MIC. A microphone, or mic, is a device that converts sound into an electrical signal. It is commonly used in many applications such as public address systems, recording studios, and live performances. The lapel attachment is a type of microphone that is attached to the clothing of an emcee, or master of ceremonies, and is used to amplify their voice during events.