Phonak FreeCom 7100 User Manual page 20

F Technical Data
u Headphone: according to regulation RTCA/DO-214
u Microphone
U Directivity: noise-canceling
U Max. sound pressure (@ 10% THD): 120dBA
u Loudspeaker systems
U Type of loudspeaker: Balanced Armature
U DC bias voltage: decoupled
U Max sound pressure (ambient): 84dBA
U Max sound pressure (communication): 98dBA
U Frequency range: 500Hz – 4.4kHz
U Speaker impedance DCR: 48Ω
u Power source
U Communication: Aircraft audio panel (no batteries)
U Dynamic hearing protection & ambient awareness:
Battery powered, 1 battery type AAA
u Voltage
U Aircraft audio panel: 4-20 V (MIC biasing)
U Battery powered: 1-1.5V (alkaline or rechargeable)
u Headset weight: 75g
u Storage temperature: -20°C - +60°C
u Operations temperature: -20°C - +60°C
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