Sound sensitivity

Sound sensitivity is a heightened perception of and reactivity to auditory stimuli, in which sounds that would ordinarily pass unnoticed become conspicuous, intense, or intrusive.

As a drug effect it is acute and dose-proportional, fading as the substance wears off; it is distinct from clinical hyperacusis, which persists outside the context of intoxication. It ranges from a mild sharpening of ambient sound to an overwhelming amplification in which everyday noise feels physically pressing or emotionally charged.

Sound sensitivity is uncommonly reported relative to other perceptual alterations. It is most commonly induced at moderate to high doses under psychedelics such as LSD and psilocybin mushrooms.

Sound sensitivity is felt as a lowering of the auditory threshold: sounds arrive more vividly, with greater detail and apparent volume than their physical intensity warrants. Music may resolve into textures that feel architectural; a dropped object can register as startling or physically jarring.

An involuntary orienting response follows each new sound before attention has time to filter it. Attending to the effect tends to amplify it — trying to ignore a noise makes it louder. At higher doses under psychedelics, sounds may acquire unexpected emotional weight or begin to interact with other senses.

Sound sensitivity arises through different pathways depending on the drug class:

• Psychedelics — act on 5-HT2A receptors in auditory cortex and related thalamic relay circuits, reducing the brain's normal gating of ascending sensory signals; stimuli that would ordinarily be filtered as irrelevant reach conscious awareness at full gain.

How much each pathway contributes in a given case is not fully understood.

Who experiences it, and how strongly, varies widely. Higher doses raise both its likelihood and intensity. Set and setting play a pronounced role — a loud or acoustically unpredictable environment makes the effect more intrusive and harder to manage, while a quiet, familiar space tends to reduce it.

Prior noise sensitivity and an anxious disposition heighten susceptibility. Expectation is also a factor: approaching a session already attuned to perceptual amplification tends to make auditory changes more salient when they arrive.