Sensible or Senseless

those who perceive what they are doing
are sensible

those who are unable or unwilling to perceive
what they are doing
are senseless

for example
some folks i know
love to play their instruments
so loud that neither they
nor anyone else is able to hear
what they are doing
this is senseless

on the other hand
i know a jazz quartet
where each person
is sensitive to their own sounds
as well as the sounds of their partners
and what follows is sensible