If growing in a apartment complex , you need a light background music to cover up the humms, and weeers of equipment.
If you have a Co2 meter running in your room with a data logger, look at the ppm jump when you go in the room. This is probly the most decerning thing. Free Co2.
One more thing when the cops or when someone comes over you can say the gal in the room is asleep and do not bug her.
If you like to sing to your plant do so as you expell co2 and it will make the plants happy.
To get twice the effect have sex in the grow room, you get happy and your, plants are twice as happy.
Playing loud music , place a sign on the door POT GROWING HERE. This save the cops time and lets your exfriends know you grow pot.
(95% if pot bust are from friends)
FEEL THE VIBS , note pot does not have ears.