| A | B |
| audible (adj) | Able to be heard |
| audit (1) (v) | to go regularly to a class without being formally involved in it |
| audit (2) (v) | 2. To officially examine the finances or accounts of an individual or organization. |
| auditory (adj) | Of or involving hearing |
| audition (n) | a short performance given by an actor, dancer, musician, or other performer that tests whether that person's skills are good enough |
| audiogram (n) | A graph showing the results of a hearing test. |
| audience (1) (n) | People who read a book, magazine, or newspaper; people who listen to or watch a radio or TV program. |
| audience (2) (n) | a formal interview with a person in authority |
| audiovisual (adj) | Using both sight and sound; typically a video. |
| inaudible (adj) | Can’t be heard |