# difference between disturbance and noise

Discussion in 'General Electronics Chat' started by baby_1, Mar 27, 2012.

Jun 3, 2011
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2. ### vpoko Active Member

Jan 5, 2012
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When I'm walking through a mall and they're playing Justin Bieber, that's noise. When I'm walking through a mall and Justin Bieber is actually there, that's a disturbance.

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3. ### baby_1 Thread Starter Member

Jun 3, 2011
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Could you explain more with a electronic signal and the wave form after and before noise and disturbance?

4. ### MrChips Moderator

Oct 2, 2009
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Noise is random variation in the signal.

White noise has flat frequency content, equal amplitudes at all frequencies. Pink noise amplitude decreases with frequency (1/f).

A disturbance is a temporary deviation from the norm.

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5. ### baby_1 Thread Starter Member

Jun 3, 2011
39
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could you show me a picture or image that shows diffrence between noise and dirturbance?

6. ### bountyhunter Well-Known Member

Sep 7, 2009
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When is your homework paper due?

A disturbance can look like ANYTHING, it's a deviation in the signal. Noise is random deviations that keep persisting.

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7. ### Papabravo Expert

Feb 24, 2006
12,279
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A disturbance is like a transient that decays arbitrarily close to zero in finite time.

Noise has an infinite time span.

In DSP terms an FIR filter will respond to a disturbance and the output will disappear in finite time. An IIR filter will have an output that does not decay to zero with a disturbance on the input.

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