Comment No we would not (Score 1) 420
None of our radio signal is/has been detectable beyond a few 1 to 10 AU and nothing was above noise beyond 1 light year, except for 2 intentional signal of 2 minutes long. The problem is the inverse square law , as distance increase your intensity drop by the square of the distance (imagine a point light, it generate a spherical wave, but as the distance increase the sphere surface increase on the square of the radius, since the intensity stay constant , each square unit on the surface get an intensity which dwindle by the inverse of the suqare of radius). The only exception were direction signal sent with intent.
We could ahve a high technological civilisation on that planet and each other NEVER know about each other despite doing radio transmission up the wazoo into space (which we don't anymore by the way we have much better way to transmit info). Each of our signal would be indistinguishable from galactic noise rapidely. And we would never know about each other. Heck even if they were on alpha centauri, 4 LY away we would not know until they intentionally send a *directional* signal in our direction powerful enough.
We could ahve a high technological civilisation on that planet and each other NEVER know about each other despite doing radio transmission up the wazoo into space (which we don't anymore by the way we have much better way to transmit info). Each of our signal would be indistinguishable from galactic noise rapidely. And we would never know about each other. Heck even if they were on alpha centauri, 4 LY away we would not know until they intentionally send a *directional* signal in our direction powerful enough.