It would not be more signal. https://en.m.wikipedia.org/wiki/Wave_interference https://en.m.wikipedia.org/wiki/Wave_interference The goal of noise canceling i

It would not be more signal. https://en.m.wikipedia.org/wiki/Wave_interference https://en.m.wikipedia.org/wiki/Wave_interference The goal of noise canceling is to fully use destructive wave interference to create a 0 amplitude "signal", which is no signal at all.