The Independent Result, and the Number Inside It
Nearly every performance figure attached to a hearing aid was produced by the firm selling it. Infinio is an exception, having been through a standardised assessment run by neither Phonak nor us: grade A, 4.9 of a possible 5, ranked second in its class out of thirty-six prescription devices. The grade is not the interesting part. Further into the report the same aid is measured twice — once as the manufacturer's software configured it, once after a clinician had adjusted it. Speech in noise went from 3.1 to 5.0. Thirty-six devices averaged 1.96. Nothing about the equipment changed between those two readings.

