My office is next to manufacturing machinery that makes a continuous noise all day long. The monotonous tone is very distracting while trying to talk on the phone to customers or even thinking by myself. I need a noise canceling circuit. Something to do with inverting op-amps I suppose. I think the input mic level should be adjustable as well as the output speaker level for tuning. Can anyone help a simple circuit design? My electronics experience is probably antiquated therefore simple is better for me.
Thanks
Thanks