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a. Essential performance of the Naída CI per IEC 60601 requirements is defined as
auditory stimulation and acoustic amplifications are within safe amplitudes and does
not create an overly loud sound.
b. Field strengths from fixed transmitters, such as base stations for radio (cellular/
cordless) telephones and land mobile radios, amateur radio, AM and FM radio
broadcast, and TV broadcast cannot be predicted theoretically with accuracy.
To assess the electromagnetic environment due to fixed RF transmitters, an
electromagnetic site survey should be considered. If the measured field strength in
the location in which the Naída CI is used exceeds the applicable RF compliance
level above, the Naída CI should be observed to verify normal operation.
c. Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
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