Key takeaways
- The outer ear collects sound.
- Middle-ear bones amplify it.
- Cochlear hair cells convert it to signals.
- The brain interprets the signals.
- Hair cells don't regrow.
Every sound you hear, from birdsong to a loved one's voice, travels through a remarkable chain of structures in just a fraction of a second.
The journey of sound
| Stage | What happens |
|---|---|
| Outer ear | Collects sound and directs it down the ear canal |
| Eardrum | Vibrates when sound waves reach it |
| Middle ear bones | Amplify vibrations |
| Cochlea | Fluid waves move tiny hair cells |
| Auditory nerve | Carries electrical signals to the brain |
| Brain | Interprets sound and filters what matters |
Why hearing changes
Noise exposure
Loud sounds can damage hair cells, which do not regrow.
Ageing
Hair cells and nerve fibres gradually decline with age.
Circulation
The cochlea depends on tiny blood vessels for oxygen and nutrients.
Other factors
Ear infections, earwax build-up, some medications and certain health conditions can also affect hearing.
Supporting your hearing
Protect your ears from loud noise, keep the volume down on headphones, look after your heart health and get regular hearing check-ups. Nutritional support can complement these habits; NeuroQuiet combines L-arginine for circulation, alpha-GPC for nerve signalling and GABA, Mucuna, L-tyrosine and moomiyo for calm, mood and vitality.
Sources
- NIDCD (National Institutes of Health) – "How do we hear?"
- American Speech-Language-Hearing Association – "How our ears work."
- World Health Organization – "Deafness and hearing loss."
Common questions
How does the ear turn sound into signals?
Hair cells in the cochlea convert vibrations into electrical signals for the brain.
Can hair cells in the ear regrow?
No, in humans they do not regrow, so protecting them is important.
When should I get my hearing checked?
If you notice changes, ringing, or have regular noise exposure; sudden loss needs urgent care.