Hexoskin provides quality assessment channels that allow you to assess the signal quality of your records. For signal quality data for the RR intervals, for example, please open the "RR_interval_quality.csv" file of interest.
To decipher the code used to evaluate the signal quality, please refer to the API.
As you can see in the section "Bits description", it shows that:
0 = the signal was reliable
1 = the signal was noisy
80 = the signal was unreliable (it can also appear under 128 (hexadecimal value))
129 = 128 + 1 = the signal was unreliable and noisy
In the example above, we can see that for about the first 10 seconds of the record, the signal quality was poor as the person wearing the Hexoskin was getting set up and then, the signal became reliable for the rest of the record.
Keywords: noise, good, inaccurate, rrinterval, rr interval, reliability, valid, validity