From Richard Price
Feedback has poked gentle fun at reports describing area in terms of football pitches or Wales, lengths as multiples of a London bus, and so on, but now you’re doing it in the story on tapping the electrical potential of ear cells (17 November, p 18).
The voltage in the cochlea is said to be “a fraction of that generated by an AA battery”. Readers are grown-up enough to cope with numbers and SI units.
• The range is 70 to 100 millivolts in the mammalian cochlea.
Chipping Sodbury, Gloucestershire, UK
