How We Hear Sounds: PDF Worksheet, Tools and Exercises for Clinical Practice

When a patient with tinnitus, hyperacusis, or misophonia insists that their ears are "broken," the real clinical challenge is not diagnostic, it is explanatory. Conveying the neurophysiological filtering model verbally, in session, without losing the patient halfway through, is harder than it looks. This fiche PDF gives you a step-by-step visual support to walk through auditory processing at the bedside, shift the therapeutic frame, and leave the patient with a concrete reference they can return to between sessions.

Why Auditory Filtering Is So Hard to Explain Without a Visual

Patients presenting with sound-related distress, whether tinnitus, noise sensitivity, or somatic hypervigilance, almost universally operate from a peripheral model: something is wrong with the ear itself. Correcting this with words alone tends to produce polite agreement in session and no change in appraisal outside it.

The specific conceptual knot that resists oral explanation is the distinction between signal and salience. Patients understand, abstractly, that the brain does something with sound. What they fail to grasp, and what sustains unhealthy avoidance behaviors and checking patterns, is that the brain actively filters, and that the filter's settings are shaped by attention, threat appraisal, and classical conditioning. Without a visible architecture, this stays an abstract idea. With a diagram, it becomes a mechanism they can point to.

The same explanatory gap appears in work with health anxiety, where hypervigilance to bodily signals mirrors the auditory filtering process almost exactly, and in PPPD presentations, where the brain's predictive processing of sensory input produces symptoms the ear or vestibular system did not initiate.

What the Fiche Contains: a Visual Architecture of Sound Perception

The fiche is organized as six numbered panels, each building on the last, making it a natural sequence to narrate in session rather than hand over to read alone.

Panel 1 maps The journey of a sound across four stages: outer ear (funnels vibration), middle ear (amplifies via eardrum and three ossicles), inner ear (hair cells convert motion to electricity), and brain (interprets the signal as meaningful). Four conversion labels, air, motion, volts, meaning, appear at each transition, giving patients an immediate visual handle on a process that usually remains invisible.

Panel 2 explains what sound physically is: a wave of moving air, where height encodes loudness and frequency encodes pitch. Two sentences anchor the key insight: "Inside the ear, sound becomes electricity. The brain then filters that electricity, keeping some and dropping the rest."

Panel 3 is the clinical core. Titled The brain as a filter, it distinguishes two simultaneous filtering mechanisms, loudness and relevance (gating out quiet, repetitive, predictable sounds) and attention and meaning (boosting signals flagged as personally important). Concrete examples appear under each: "the fridge hum, the clock ticking, the fan you stopped hearing" versus "your name across a party, a baby's cry at night." The panel closes with the statement that becomes a session anchor: "Hearing is not a recording. It is a decision." This framing does in one sentence what several minutes of Socratic dialogue often cannot.

Panel 4 offers three reframes structured as cognitive shifts, directly serviceable in a CBT or schema-level restructuring conversation: "The sound is louder today" becomes "My filter is more open today, what changed: sleep, stress, attention, fear?"

Panels 5 and 6 provide session discussion prompts and a condensed summary. The discussion prompts are clinically precise: they target scanning and checking behavior, day-to-day loudness variability, and threat appraisal of the sound, exactly the three maintenance axes Jastreboff's neurophysiological model of tinnitus identifies, and exactly what the CBT model of tinnitus addresses in formulation.

> To note: the fiche is a visual support that facilitates the explanation of auditory filtering in session, not a self-administered questionnaire. Its value lies in giving the clinician a shared diagram to narrate and annotate during psychoeducation, then leave with the patient as a concrete reference.

When and How to Introduce It

This fiche PDF fits naturally at the first psychoeducation moment, typically sessions two or three, once the anamnèse has established the patient's relationship to the sound and their current appraisal of it. It is particularly indicated where:

• Tinnitus or hyperacusis is the presenting complaint and the patient attributes distress entirely to the ear
• Anxiety-related hypervigilance to somatic or environmental sounds is maintaining a fight-or-flight loop
• The patient reports that the sound "gets worse" on high-stress days, opening a direct entry point to Panel 3
• Checking and scanning behaviors are present, where the cycle of avoidance around sound needs to be named before habituation work can begin

A straightforward introduction: "I'd like to show you a diagram of how the ear and brain actually process sound together, because it changes what we can work on." Avoid framing it as reading homework; instead, walk through panels 1 to 3 together, pausing at the filter diagrams to ask which examples resonate. The reframes in Panel 4 can be debriefed immediately as a bridge to the patient's specific maintenance pattern.

The one limit worth naming: the fiche presupposes no significant hearing loss causing the primary complaint. In patients with audiologically confirmed peripheral damage, the filtering model remains valid but needs to be introduced alongside, not instead of, acknowledgment of the peripheral component. The fiche does not replace the autonomic nervous system or threat-appraisal psychoeducation that often needs to accompany it, it is the entry point, not the full formulation.