Misophonia is an extreme emotional reaction to specific, typically occurring sounds. The term comes from Greek roots: “miso” meaning dislike or hatred, and “phonia” meaning sound, together translating to “a dislike or hatred of sounds.” The term “misophonia” was introduced in 2001 by Drs. Pawel and Margaret Jastreboff. While the name may suggest a general dislike of sound, misophonia involves intense reactions to particular sounds, known as trigger sounds. The “hatred” associated with misophonia reflects an involuntary response to a trigger rather than a deliberate judgment about the sound itself.

This condition is also known as Selective Sound Sensitivity Syndrome (4S), a term introduced by audiologist Marsha Johnson. This name emphasizes the selective nature of the sensitivity, as individuals react strongly to specific sounds rather than to sound in general. Although misophonia is now the more widely recognized term, it also includes visual triggers.

To understand misophonia clearly, it is important to note what it is not:

  • Hyperacusis: sensitivity to the volume of sound, which can develop in childhood or adulthood and can be assessed and treated by an audiologist.
  • Phonophobia: a fear of sound, common in children and sometimes associated with autism.
  • Sensory Processing Disorder (SPD): a general intolerance to sensory input across multiple senses, including sound. SPD reactions are not misophonia.
  • Reactions to repetitive or loud sounds: highly sensitive individuals may become upset in noisy environments, but misophonia is defined by an immediate response to a single trigger sound.
  • Common irritating sounds: sounds such as nails on a chalkboard, a baby crying, or metal scraping glass provoke discomfort but are not misophonia triggers.

In misophonia, exposure to a trigger stimulus produces an immediate and involuntary response. Triggers are most often soft sounds, though visual triggers can also occur. People with misophonia may notice subtle sounds that others do not, and even a faint trigger—such as gum popping across a room—can provoke a strong reaction.

The emotional response to triggers is intense and often includes:

  • Anger or rage
  • Disgust or resentment
  • Feeling personally offended

Individuals with misophonia frequently want to escape the sound or make it stop. While intrusive thoughts of verbal or physical confrontation may occur, acting on these impulses is rare.