Noraxon U.S.A., Inc.
myoMOTION Data Logger
P-6828 Rev A (Oct 2014)
33
Appendix
C
–
Radiation
Exposure
Information
Regarding
Use
of
myoMOTION
Sensors
Each myoMOTION sensor contains a radio frequency transmitter. The radiated power emitted
from each individual myoMOTION sensor is very low. To put this in perspective, at full power
each myoMOTION sensor transmits at less than 0.1% of the power of a typical active cell phone.
Radiation exposure from a single myoMOTION sensor is thus extremely low.
The myoMOTION sensors are designed to operate at two different power levels in order to keep
the already very low levels of radiation exposure to an absolute minimum. The myoMOTION
sensors activate their higher power level only during periods of actual data collection. During idle
times (at setup and in between actual measurements) the myoMOTION sensors reduce their
radiated power to an even lower level (less than 0.01% of the power of a typical active cell
phone).
The effects of non-ionizing radiation on biological tissue are still being studied and published ‘safe
levels’ of exposure are subject to review. Today, cell phone usage is widespread and declared
‘safe,’ although the long-term cumulative effect of cell phone usage has yet to be determined. In
contrast, the myoMOTION sensors operate at power levels 1000 to 10,000 lower than typical cell
phones while limiting exposure to a single episode over a brief time interval.
Because there can be multiple myoMOTION sensors applied in intimate contact with the body,
their sum total collective radiation effect may be questioned. Based on comparative power levels,
a full complement of 16 myoMOTION sensors emit a combined (distributed) radiation level still
several orders of magnitude lower than that of a typical cell phone, which radiates all of its energy
from one focal point (next to the person’s head).
At present, Noraxon identifies no restrictions on use and placement of the myoMOTION sensors
on any portion of the human body. The myoMOTION sensors operate at radio frequencies known
to effect older style pacemakers. Because the effects are not known at this time, Noraxon advises
against using the myoMOTION system on anyone with an implanted pacemaker.
In summary it is prudent to keep in mind that due to biological diversity, certain individuals may
have higher sensitivity to radiated emissions. Although it has never been known to occur, the use
of the myoMOTION system should be stopped if the person being monitored reports any unusual
sensations.
