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clarification in signals and systems

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Bhuvanesh Nick

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In some notes i got example for aperiodic signal as speech . like in that way i need an example for deterministic and random signal
 

A "conceptually"-deterministic signal might be a signal that is defined by an exact equation (e.g. sin(t), for all real numbers t), which has no random/stochastic/probabilistic component.

IF I am using the correct definition of "deterministic" (i.e. "not stochastic"), then I believe that all "real world" signals would not be deterministic, and would be stochastic (i.e. random).

A good example of a random signal is noise, such as the "static" noise that comes from the speaker of an AM radio when the receiver is not tuned to any station.

But music and speech would also both be considered to be stochastic, if you don't know what they will be, in advance.

And I guess you could just define random_signal_example(t) = true_random(t)! :)

Anything that you don't know in advance, the value of which is a random variable at any instant, is "stochastic"; i.e. a "random process".
 
Person above gave the right answer. All you need to know that any signal that can be defined by an equation is a Deterministic signal. Any signal that cannot be defined by an equation is a Random signal. If you want a random signal, try recording the sound of road traffic and display it as a waveform, thats a random (audio) signal for you.
 
tgootee said:
A "conceptually"-deterministic signal might be a signal that is defined by an exact equation (e.g. sin(t), for all real numbers t), which has no random/stochastic/probabilistic component.

IF I am using the correct definition of "deterministic" (i.e. "not stochastic"), then I believe that all "real world" signals would not be deterministic, and would be stochastic (i.e. random).

A good example of a random signal is noise, such as the "static" noise that comes from the speaker of an AM radio when the receiver is not tuned to any station.

But music and speech would also both be considered to be stochastic, if you don't know what they will be, in advance.

And I guess you could just define random_signal_example(t) = true_random(t)! :)

Anything that you don't know in advance, the value of which is a random variable at any instant, is "stochastic"; i.e. a "random process".
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Thank you so much sir
 

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