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An old question running through my mind:

Displays, camera, speakers, microphones: why after more than 50 years of development do they still need calibration?

Whatever cheap or high-end material I come across in the reviews I read from time to time, none seams to be properly calibrated.

There is enough research and commercial competition over these transducer categories for a time long enough to make this intriguing...

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closed as too broad by Nick Alexeev Oct 14 '14 at 20:04

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    \$\begingroup\$ Calibrated in what way? \$\endgroup\$ – Dave Tweed Oct 14 '14 at 19:32
  • \$\begingroup\$ Because randomness is a thing. \$\endgroup\$ – Ignacio Vazquez-Abrams Oct 14 '14 at 19:35
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    \$\begingroup\$ It wouldn't make sense to calibrate a microphone in the factory, if, for example, the acoustic properties of the room it's used in will force the user to recalibrate it anyway. \$\endgroup\$ – The Photon Oct 14 '14 at 19:36
  • \$\begingroup\$ Flat frequency response for audio transducers and delta-E (for example) zeroing for optic ones. \$\endgroup\$ – user9020 Oct 14 '14 at 19:37
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    \$\begingroup\$ @user9020 From the EE.SE standpoint, there are two problems with this question. (1) It's too broad, because it covers displays, camera, speakers, microphones... all of those. (2) This is a prosumer question, or an operations question. This is not an electronics design question. \$\endgroup\$ – Nick Alexeev Oct 14 '14 at 20:03
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Calibration is expensive. Regarding consumer equipment, most users want less expensive product and do not mind small deviations. If you are willing to pay, you can get very precise stuff with decades of research in it.

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    \$\begingroup\$ ... and re-calibrate it every year or so. \$\endgroup\$ – Nick Alexeev Oct 14 '14 at 20:05

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