Is it possible exctract sinusoids from non periodic signal?

1. Can we use Fourier series for non-periodic signals?
2. How do you find the frequency of a non-periodic signal?
3. What can be used for periodic and non-periodic signals?
4. Can we say whether a signal is periodic or nonperiodic?

Can we use Fourier series for non-periodic signals?

Fourier series is defined for periodic signals and the Fourier transform can be applied to aperiodic (occurring without periodicity) signals.

How do you find the frequency of a non-periodic signal?

A truly non-periodic signal doesn't have a repeating pattern and as a result the signal only occurs once over any stretch of time. So its frequency is 1 occurence/infinite time or practically 0 Hz.

What can be used for periodic and non-periodic signals?

Examples of periodic signals include the sinusoidal signals and periodically repeated non-sinusoidal signals, such as the rectangular pulse sequences used in radar. Non-periodic signals include speech waveforms and random signals arising from unpredictable disturbances of all kinds.

Can we say whether a signal is periodic or nonperiodic?

A signal is said to be periodic signal if it has a definite pattern and repeats itself at a regular interval of time. Whereas, the signal which does not at the regular interval of time is known as an aperiodic signal or non-periodic signal.