This is an instant idea that I got right after i read an article about noise. Do you think it is possible to make an noise cancelling headphones by using the LM741. Except, i wont be amplifying the signal from the inputs (i can if choose to by just adjusting the varistor) but by using this op amp, im able to invert the signal and somehow broadcast it back to the listener. The concept of destructive waveform is what i have in my mind. Havent done much research yet but suspect there might be some trouble in between such as the delay that might have occur during the inversion and amplification. legit?