| electronic equipment that converts sound into electrical signals that can be transmitted over distances and then converts received signals back into sounds | the aperture of a wind instrument into which the player blows directly |
| | the tube of a pipe or cigarette holder that a smoker holds in the mouth |
| | an acoustic device; the part of a telephone into which a person speaks |
| | (especially boxing) equipment that protects an athlete's mouth |
| | a part that goes over or into the mouth of a person |
| | a spokesperson (as a lawyer) |