The term "Acoustic Reflex" is used to describe a natural response of the ear when it hears a loud sound or noise. This reflex is also referred to as a middle ear muscle reflex or stapedial reflex. There are several synonyms for the term "Acoustic Reflex" that are often used interchangeably. These synonyms include Acoustic Reflex Threshold, Stapedial Reflex, Acoustic Reflex Decay, Middle Ear Muscle Reflex, and Acoustic Immittance. These terms are all used to describe the same phenomenon, which is a protective mechanism that helps to prevent damage to the ear from loud sounds. The Acoustic Reflex is an important part of our hearing health, and its functioning should be checked regularly by an audiologist.