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In 1936, an engineer named Arthur G. Nielsen learned about a device called an audiometer. Invented by two professors at the Massachusetts Institute of Technology, the audiometer kept a minute-by-minute record of whether a radio was on or off and where the dial was set. Nielsen had a yen to measure things and already owned a company that sampled sales from grocery stores to identify broader retail trends. What could he measure with an audiometer?

GENRE
Zaken en persoonlijke financiën
UITGEGEVEN
2012
1 januari
TAAL
EN
Engels
LENGTE
12
Pagina's
UITGEVER
American College of Physician Executives
GROOTTE
246,4
kB

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