An<unk> , sometimes referred to as a "throat back", is a medical device about the size of a small electric razor used to produce clearer speech by those people who have lost their voice box, usually due to cancer of the larynx. The most common device is a handheld, battery-operated device pressed against the skin under the mandible which produces vibrations to allow speech; other variations include a device similar to the "talk box" electronic music device, which delivers the basis of the speech sound via a tube placed in the mouth. Earlier non-electric devices were called mechanical larynxes. Along with developing esophageal voice, using a speech synthesizer, or undergoing a surgical procedure, the<unk>  serves as a mode of speech recovery for laryngectomy patients. The Voice Quality Symbol for<unk> eal phonation in speech is И, approximating the symbol for electricity.
Electrolarynx
Combitube
Laryngeal tube
Nasal cannula
Cragie tube
Laryngeal mask airway
Tympanostomy tube
Surgical mask