Hearing and communication in rehab

How hearing loss interacts with neurological conditions and what carers and clinicians can do to support clear, effective communication.

Hearing loss is one of the most modifiable risk factors for cognitive decline - and one of the most overlooked. In rehabilitation, poor hearing compounds nearly every difficulty: it makes therapy instructions harder to follow, social interaction more effortful, and cognitive assessments unreliable.

The hearing-cognition link

Hearing loss forces the brain to work harder to decode speech, diverting resources from memory and executive function. Over time, social withdrawal driven by hearing difficulty reduces the cognitive stimulation that supports brain reserve. This is why treating hearing loss is not just a comfort measure - it’s brain health.

Estimated impact: researchers estimate that hearing loss accounts for about 8% of dementia cases globally, making it the single largest potentially modifiable risk factor in the 2024 Lancet Commission.

Spotting hearing difficulties in rehab

Hearing loss is often missed because people adapt quietly:

They watch faces closely (lip-reading) rather than hearing clearly.
They nod along without fully understanding.
They respond to the gist of a question, not its exact content - which looks like a memory or comprehension problem.
They withdraw from group conversations.
Cognitive assessments over-estimate impairment if the person didn’t hear the questions correctly.

Red flag: if a cognitive decline seems sudden or unexpectedly severe, check hearing before attributing it to neurological decline.

Practical strategies for carers and clinicians

Situation	Strategy
Giving instructions	Face the person; speak clearly at a moderate pace; don’t shout
Noisy environment	Move to a quieter room; turn off background TV/radio
Checking understanding	Ask the person to repeat back key points
Hearing aid	Check it’s in, switched on, and the battery works before therapy
Written backup	Write down key words or instructions alongside speaking
Group settings	Use a hearing loop or FM system if available

Hearing aids in rehab

Hearing aids are chronically under-used even when prescribed. Common barriers include:

Feeling self-conscious about wearing them.
Difficulty with the manual dexterity required to fit and maintain them (especially after stroke or with Parkinson’s).
Background noise amplification (older analogue aids).

Modern hearing aids with directional microphones and Bluetooth streaming significantly reduce background noise. Involving the occupational therapist to support hearing aid management as a daily living skill often makes the difference.

Screening

The Whispered Voice Test and the single-question “Do you feel you have hearing difficulty?” are quick clinical screens. A full audiological assessment is the gold standard and takes about 30 minutes.