Difference between iPad generations

Characteristics of the headphone microphone input is almost the same in iPad2, third-generation iPad, iPad mini, and fourth-generation iPad, but slightly different in the first generation iPad.

Under high dose (about 3μSv/h), first generation iPad shows 5% higher cpm compared to iPad2.
Under small dose (about 0.065μSv/h), both show almost same cpm.
  iPad2 First gen iPad
Cs137 peak [p.h.] 8300 8000
A Cs137 sample source at 0cm 14544 cpm 16013 cpm
256.9 cpm 255.1 cpm

  • 最終更新:2013-05-22 15:29:45