This means one examines the temperature / time graph, and determines whether there is a statistically significant signal against the background of the noise. (judithcurry.com)
For example, did you know that placing your wifi router by the TV or next to an electrical appliance can lead to significant signal interference? (idealhome.co.uk)
We experienced significant signal drop in our testing, the active noise cancelling was minimal at best, and a sibilant sound quality made cymbal hits and «s» sounds fatiguing to listen to. (thewirecutter.com)