noise_table question

Section 4.5.4.3 on noise_table specifies that linear interpolation
is used (presumably for frequencies inside the range of frequencies
specified in the vector).

What happens outside the vector?
1) value is zero
2) if the first pair is (fmin,val1), then for frequencies < fmin,
   the value is val1; similarly if (fmax,valn) is the last pair,
   then the value is valn for frequencies > fmax.

I propose (2).


Also, the LRM does not specify what a "vector" is.

-Geoffrey