4 Assessing spectral coefficient

Question 1

A finite signal?

Answer 1

Any finite signal x_n (n = 0, 1, 2, … N-1) can be described exactly
with a finite sum of sinusoids

Question 2

Analysis?

Answer 2

The process of retrieving the parameters of the underlying sinusoid for an sound recording of a microphone for example, measured in V.

Includes pre determined mathmatical operations

Question 3

The aims of analysis?

Answer 3

Question 4

How can the rotating phasor be used to speed up analysis?

Answer 4

Question 5

The equation for spectral coefficients?

Answer 5

Question 6

The scaling factor for the spectral coefficients equation?

Answer 6

the scaling factor 2/N is a suitable scaling factor to easily calculate
the amplitude of a sinusoid. It results in the scaling factor for the
spectrum representation. Matlab requires multiplication with 2/N.

Question 7

The amplitude and phase need to be calculated from each
complex spectral coefficient

Answer 7