London's Pulse: Medical Officer of Health reports 1848-1972
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Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
Tottenham 1934
[Report of the Medical Officer of Health for Tottenham]
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"BB"
AUDIOMETER TESTS.
COMPARATIVE PERCENTAGE DISTRIBUTION OF HEARING
LOSS, IN GROUPS.
A. (-3 to 6 units) ; B. (9 to 18 units), and C. (21 to 20 units).
IN ALL EARS TESTED.