<unk>  is defined as a temporary loss of hearing after exposure to sound. This results in a temporary shift of the auditory threshold known as a temporary threshold shift (TTS). The damage can become permanent (permanent threshold shift, PTS) if sufficient recovery time is not allowed before continued sound exposure. When the hearing loss is rooted from a traumatic occurrence, it may be classified as noise-induced hearing loss, or NIHL. There are two main types of<unk> , short-term and long-term. These are distinguished from each other by several characteristics listed individually below. Short-term fatigue * full recovery from TTS can be achieved in approximately two minutes * the TTS is relatively independent of exposure duration * TTS is maximal at the exposure frequency of the sound Long-term fatigue * recovery requires a minimum of several minutes but can take up to several days * dependent on exposure duration and noise level
Auditory fatigue
Olfactory fatigue
Auditory exclusion
Nyctalopia
Ocular dysmetria
Physiological anisocoria
Mechanical anisocoria
Cyclopia