The doseBadge stores the average noise level every minute. When the measurement is then downloaded you get a graph of the noise over time.
The most useful aspect of Time History is the ability to see at a glance that the measurement looks valid (e.g. the doseBadge has not been taken off and left lying on a noisy machine) and the ability to identify noisy times of the working shift.
The doseBadge also has a Time History of Peak Levels and Battery Level.