vity of the sensor: We are now guessing that the Motionlogger
had a sensitivity of 0.01 <em>g</em> but without direct proof.</li>
<li>Relationship between piezo-electric acceleration signal used at that
time and modern piezo-capacitive acceleration signals.</li>
</ol>
<p>From personal correspondence with AMI, we learnt that the technique
has been kept proprietary and has never been shared with or sold to
other actigraphy manufacturers (time of correspondence October 2021).
Based on the correspondence with A