"Uhm..."  She looked up in the air for a moment.  "Okay.  Like mages, your average technomancer can only connect so much with the Resonance - the thing that fuels our power.  However, technomancers can study submersion - a way of boosting your connection.  It allows you to increase your tie to Resonance, giving you more juice.  An Echo is something that you acquire as a side effect of submersion.  However, research shows that technomancers can actually acquire Echoes by themselves, without needing to submerge.  You follow?"