Post-traumatic stress disorder (PTSD) is usually conceptualized in terms of its psychological impact. But Van der Kolk and McFarlane recently reminded us that beneath this affective/cognitive layer is a fundamental disruption in how the brain processes the sensory world.

In their article, they note that “little attention has been paid to the central role of sensory processing“, that “critical elements of the phenomenology and neurobiology of traumatic stress” have been ignored, and that “somatic symptoms and lack of sensory regulation are central, not peripheral, to the clinical presentation of PTSD” [1].

With this in mind, we decided to ask the somewhat peculiar question: What does PTSD sound like?

To find out, we examined over 200 first-person accounts of sound and hearing from public PTSD communities. From these, we identified four canonical features that can be tethered to specific findings from auditory neuroscience in PTSD populations.

Auditory Disinhibition

“Background noise never becomes background. I hear all of it.”*
“I hear everything, all at once, and my brain doesn’t decide what I don’t need to hear.”
“Every little sound gets my attention. Nothing seems to get filtered out.”

Normally, the brain performs a remarkable audiological task — not hearing.

Repetitive, irrelevant sounds are suppressed so attention can be directed toward what matters — a process called sensory gating. In PTSD, this system can become less effective, leaving far more of the auditory environment competing for attention. This is not simply heightened sensitivity to sound, but a collapse of the distinction between what should be heard and what should be filtered.

Perhaps the most striking finding across the literature is the consistency of subjective sensory gating deficits, despite considerable heterogeneity in where the processing failure occurs. Across electrophysiological studies, PTSD is associated with weaker filtering of repetitive or irrelevant sounds, heightened automatic attention to unexpected auditory changes, and reduced inhibitory control over sensory processing. At the same time, the brain appears to preferentially process salient or emotionally meaningful information while giving less priority to neutral input [2–5].

In PTSD, the auditory baseline is cacophony.

Auditory Threat Reactivity

“A door slams and my whole body jumps before I even know what happened.”
“A knock at the door can send my heart racing instantly.”
“I still jump at loud noises every time — no matter how many times I remind myself I’m safe.”

The auditory system doesn’t wait for conscious recognition before mounting a defensive response. Fast subcortical pathways route sudden sound straight to brainstem startle circuitry, while the amygdala regulates how strongly the body reacts — which is why a jolt, a racing heart, or a surge of adrenaline can arrive before the sound has even been identified [6, 7].

In PTSD, this reflex isn’t simply turned up across the board. It’s especially sensitive to context: Startle responses become most abnormal specifically under unpredictable threat, which is why the same sound can barely register one day and set off a full reaction the next, depending on stress, perceived safety, and expectation [8]. The body responds to sound before the mind can decide if it’s dangerous.

In PTSD, the fear circuit turns up the gain on an auditory startle reflex.

Conditioned Auditory Salience

“The sound of dishes being handled aggressively makes me freeze. It used to come right before an argument.”
“Whenever I hear a hint of frustration in someone’s voice, I immediately start bracing for what comes next.”
“A car pulling into the driveway still makes me tense. That sound used to mean they were home.”

In PTSD, the importance of a sound may have surprisingly little to do with its volume. Through fear conditioning, an otherwise ordinary sound can acquire predictive meaning because it was repeatedly associated with danger [6].

The effect is especially interesting with the human voice. Studies of affective prosody, the emotional information carried by tone and rhythm rather than words, find altered processing in PTSD [9]. In women with childhood-abuse-related PTSD, identification of several emotional tones was slowed, while recognition of anger was relatively preserved, suggesting preferential processing of threat-relevant vocal information [10].

Post-Traumatic Stress Disorder Essential Reads

This may also explain why predictability and control matter so much. PTSD studies find particularly abnormal responses to unpredictable threat [8] and impaired use of contextual safety signals [11]. The auditory system is responding not simply to how loud a sound is, but to what that sound has been learned to mean.

Just as the body keeps the score, so does the ear.

Dissociative Auditory Attenuation

“People are talking to me, but suddenly their voices sound far away.”
“Everything becomes muffled, like I’m hearing it underwater.”
“I can see someone speaking, but the words stop registering.”

PTSD can present along two broad response patterns: a hyperaroused presentation, in which threat-response systems remain highly engaged, and a dissociative presentation, characterized by greater shutdown and disengagement.

Interestingly, auditory processing appears to track this divide. In combat veterans, intrusive re-experiencing was associated with larger neural responses to startling sounds, while maladaptive avoidance was associated with reduced neural responses to the same sounds [12]. The auditory system in PTSD, then, is not simply turned up. Its regulation can move in either direction, from sensory flooding to sensory shutdown.

In PTSD, psychology and neurobiology are coupled.

What PTSD Sounds Like

Taken together, these accounts support a broader idea now emerging in PTSD research: Sensory dysregulation is not simply a byproduct of PTSD, but part of the disorder itself. Understanding PTSD requires asking not only what happened, how it is remembered, and what it means, but also how that experience has changed the way the brain processes the sensory world.

This becomes especially important when PTSD occurs alongside disorders such as tinnitus and hyperacusis, where the auditory system is already central to the patient’s symptoms. At our tinnitus clinic, trauma-informed care means addressing both the psychological and auditory-processing elements of PTSD. It means that, in addition to the psychiatric history, we need to ask: What does the world sound like to you?

*These are composite examples, not direct quotes, in order to preserve the anonymity of the individuals whose experiences informed them.