Understanding tinnitus

Tinnitus is the perception of sound without an external source. In around eighty per cent of cases it is generated inside the auditory pathway after some loss of input — often a small amount of high-frequency hearing loss that you may not even have noticed. The brain, deprived of certain inputs, increases its internal gain and starts to fire spontaneously. You hear that firing.

The sound itself is not dangerous. It is not a sign that anything is being damaged in real time, and it does not predict further hearing loss. Tinnitus is a perceptual phenomenon — like a phantom limb, but for sound.

What makes tinnitus a problem is not the perception. It is what the nervous system decides the perception means. CBT works on that meaning.

Pawel Jastreboff’s neurophysiological model identifies three systems involved in tinnitus distress: the auditory cortex that detects the sound, the limbic system that decides whether it is threatening, and the autonomic nervous system that prepares the body to react.

When the three systems are coupled, a feedback loop forms. The cortex notices the sound, the limbic system tags it as danger, the body tenses, the cortex notices it more — and round it goes. Habituation is the process of breaking that loop, and CBT is the most evidence-backed way to do so.

This programme will not make your tinnitus quieter at the source. No therapy reliably does. What it will do, over eight weeks, is teach your nervous system to stop tagging the sound as a threat. Most people stop suffering from tinnitus long before they stop hearing it.

The format is short daily readings plus simple homework. You can do it in ten minutes a day. Skipping days is fine. Skipping weeks is fine. Coming back is fine. The mechanism is repetition, not perfection.