Another good one... I was just giving a guitar lesson to a girl (I know, there are worse jobs), and I asked her to use a metronome application on her computer. No problem, the software launches correctly. No sound. She did the good thing and switched the speakers on. So the metronome was working, but there was a weird loud buzzing noise on the background. And it was not random, it was a reapeating pattern. Very disturbing when using a metronome.
So I ask her : "what's that funny noise ?" "Oh, it always does that", she replies. "It's even worse with cell phones".
Cell phones.
I looked at the desktop where lays the computer and the speaker. Next to the main speaker (the one with volume control), were sitting, on 20 centimeters : a modem, a wire-less networking device, and a wire-less phone support (the phone was taken in another room not to disturb the lesson).
I innocently told her "huh, did you ever try to move your telephone-stuff away from the loudspeaker ?". She did'nt understood, but tried on. Moving the wireless-phone device from 10 centimeters suppressed the noise on the speakers.
She had been searching the cause of the noise for several months :facepalm:
So I ask her : "what's that funny noise ?" "Oh, it always does that", she replies. "It's even worse with cell phones".
Cell phones.
I looked at the desktop where lays the computer and the speaker. Next to the main speaker (the one with volume control), were sitting, on 20 centimeters : a modem, a wire-less networking device, and a wire-less phone support (the phone was taken in another room not to disturb the lesson).
I innocently told her "huh, did you ever try to move your telephone-stuff away from the loudspeaker ?". She did'nt understood, but tried on. Moving the wireless-phone device from 10 centimeters suppressed the noise on the speakers.
She had been searching the cause of the noise for several months :facepalm: