Roger Covert 2.0
The limitation of a neckloop
Traditional analog systems use a neckloop, which emits an electromagnetic field from the source to induce a signal in the earpiece. This system is based on old technology from the last century.The problem is that agents can also hear stray electromagnetic interference (EMI) if it’s present. EMI can be generated by a number of sources such as nearby dimmer switches, fluorescent lights, automobile engines, and heavy electronic equipment. That’s why communication can be “muffled or broken” in surveillance operations. Neckloops are visible and can even strangle the wearer in the worst case.
The unique advantages of Roger
Roger is a technology standard developed by Phonak, which features adaptive, wireless transmission and runs on the 2.4 GHz band. Roger audio signals are digitized and packaged into very short (160 μs) digital bursts of codes (packets) and broadcast several times, each time using different channels between 2.4000 and 2.4835 GHz. Frequency-hopping between channels, in combination with these repeated broadcasts, avoids interference issues.Phonak has developed the proprietary Roger microchip for dedicated use with miniaturized ear-level receivers. This chip contains 6.8 million transistors.