Odd idea about noise

[Roobin]

Just wondering, could it be possible to detect which type of noise was in a device, by hooking it up to a tuner. I usually hook up the lineout of my amp to a tuner, and it reads G1. Just an idea.

Also, is it possible to detect the source of noise using the audio probe? Or is that not possible.

[petemoore]

  Also, is it possible to detect the source of noise using the audio probe?
  By following and AProbing through the successive stages of a circuit, a noisy stage can easily be recognized by the increase in noise from before/after that stage.
  High gain stages tend to be more 'inherently' noisy.

[Ge_Whiz]

Your 'G1' reading is 50Hz mains hum. That's about all you can distinguish. True 'noise' has no frequency.

When I was a poverty-stricken teenager I used to tune my bass to the 50Hz buzz from my mains electric shaver.

[birt]

Your 'G1' reading is 50Hz mains hum. That's about all you can distinguish. True 'noise' has no frequency.

wrong, true noise has every frequency in it


cool little trick: take some small bits out of an audio clip (any song or tune will be fine) and listen to the clip, you will definatly notice those moments of silence, even if they are really really short.
now fill those gaps with 'true noise'. when you listen to the song you will hardly notice there are small parts missing because your brain will make you hear the song in those gaps. since the noise has all the frequencies of the normal song in it, your brain will recreate the missing bits of the song.

[aankrom]

cool little trick: take some small bits out of an audio clip (any song or tune will be fine) and listen to the clip, you will definatly notice those moments of silence, even if they are really really short.
now fill those gaps with 'true noise'. when you listen to the song you will hardly notice there are small parts missing because your brain will make you hear the song in those gaps. since the noise has all the frequencies of the normal song in it, your brain will recreate the missing bits of the song.

I think this is an example of what is called stochastic resonance.

[Roobin]

The audio probe sounds cool - ill give it a go sometime.

Also, the stochastic resonance can also be applied to eye (obviously not called the same). Your eye, actually makes up pictures based on things you've seen in the past. Not all the time, but some of the time, like when you look at a distant tree, theoretically, some of the branches arent there... odd but true (I do GCSE Biology).