Earphone Characteristics
Type: Rocking Armature Dynamic
Input Impedance: 150 ohm ± 15% @ 1KHz
Sensitivity (nominal): 102dBSPL ± 2dB/mW @ 1.2KHz
Frequency Response: ± 10dB variation from 500Hz to 4000Hz
Harmonic Distortion: <1% @ 114dBSPL @1KHz
Microphone Characteristics
Type: Electret 20 meter submersible capsule requiring 1.3 to 10V DC supply
Output Impedance: 2000 ohm nominal
Sensitivity (nominal): -30dBV ± 4dB at 1KHz re to 1V/Pa
Frequency Response: ± 1dB from 100Hz to 4KHz
PTT Switch Characteristics
Resistance, not pressed: Greater than 10M ohms at radio connector
Resistance, pressed: Less than 10 ohms at radio connector
Operating Force: 3 to 5 lbs, 13.3 to 22.2 newtons
Operating Life: 500,000 cycles minimum
Environmental Characteristics
Immersion: IP68 (20 meters, 2 hour)
