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Results tagged with noise
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user 59771
Noise is an unwanted disturbance in an electrical signal. This tag is for questions about sources of noise, noise types, issues caused by electrical noise, or improving the signal-to-noise ratio of an analog circuit.
2
votes
1
answer
88
views
Can electrical noise cancel itself out?
If two independent noise sources are added together, their noise adds up like so:
$$RMS_{sum} = \sqrt{RMS_1^2 + RMS_2^2}$$
Am I correct to assume that this only holds if the noise sources are independent … In this case, the noise of R1 should not appear at the output, correct? …
- 209
2
votes
3
answers
1k
views
Mains hum without ground loop
When I hook a device to the monitor input of my digital piano, I get a very noticable 50Hz hum.
I understand that the monitor input doesn't have to be particuarly good quality, but it really is annoy …
- 209
2
votes
Accepted
Mains hum without ground loop
It was the cable after all.
It has a loose connection. Unless manipulated, it connects and sound gets through. That is why I didn't notice initally. Even then, I ruled it out as the cause for the hu …
- 209