2 very different ‘issues’ but potential for a combined solution.
If hearing is becoming difficult on a person level then the council should make reasonable provision for suitable assistance under accessibility and equality premise - a mag hearing loop for example.
To record discussions due to disputes is a separate issue and - if it is creating tension and / or dispute - then it might be beneficial to audio / video record.
To do so has significant advantage across several reasons.
Livestream or upload as community engagement
Openness & transparency
accurate record keeping
Dispute resolution
Audit trail
If all else fails, apersonal recording device is cheep and really useful.