Hello just purchased a DMM-6, installed REW and loaded calibration file all good. When I'm running measurements I'm getting a spike at 50hz of over 130dB and then lower spikes further up the spectrum. I have tried another computer, one of them is a laptop which is on battery/unplugged. I've turned the power off to the whole apartment and it reduces but doesn't go away.
I've attached a graph, orange is loud, green was disturbingly loud, blue is with the speakers muted in a quiet room, mic in the same place.
Second image with quiet room and smoothing turned off.
Any insight appreciated.
Thank you.
I've attached a graph, orange is loud, green was disturbingly loud, blue is with the speakers muted in a quiet room, mic in the same place.
Second image with quiet room and smoothing turned off.
Any insight appreciated.
Thank you.