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hcilab / BreathingSonarJS

A Javascript web-tool that monitors breathing using high-frequency sonar
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Normalized Sensor readings take a long time to settle in. #5

Closed aarontabor closed 4 years ago

aarontabor commented 4 years ago

Overview

I'm currently computing normalized readings based on the raw data buffered over a 15-second rolling window. Therefore, I would expect the normalized readings to hone-in and basically oscillate around 0 after a 15-second start-up period, but this doesn't seem to be the case.

What I'm observing now is almost another full 15-seconds elapses while the normalized signal stays above 0, before an abrupt DC shift when it finally settles in as expected.

Tasks

aarontabor commented 4 years ago

This turned out to be a calculation error when determining the number of readings to store in the rolling window, which caused the rolling window to actually be much longer than expected - in turn taking a long time to settle in.

Fixed in 729829677a53988353f6084e4b5a26ce3b8c19ab

aarontabor commented 4 years ago

This is related, but independent from #4. Since #4 is still an issue, leaving it open for now.