Hearing in numbers
HEARING NUMBERS The number of ears on a fish. Fish can hear pressure changes through ridges on their body. 770 The speed of sound measured in miles per hour (1,230 kilometres per hour). 10 The number of kilometres it is believed an elephant can hear another elephant's call, under ideal conditions. billion, The number estimated to be affected by hearing loss by 2015. 16 The percentage of the world's population affected by hearing loss by 2015. 115 The number of dBs a baby's cry can reach - louder than a car horn! BABY IN CAR The percentage of hearing impaired people in Norway who use hearing aids. 14 The percentage of hearing impaired people in Japan who use hearing aids. 30,06 Humans are born with 30,000 cochlear and vestibular hair cells per ear. 33 March 3 is observed as the International Ear and Hearing Care Day. This date was chosen because the two 3s in the date represent two ears. WIDEX HIGH DEFINITION HEARING
Hearing in numbers
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