Re: db to saol

From: John Lazzaro (lazzaro@CS.Berkeley.EDU)
Date: Tue Apr 18 2000 - 17:18:07 EDT

Hi Peter,

dbamp(xsig x)

computes

90 + 20 log10(x) for x > 0

so yes, log10(1) = 0, and
so 1.0 in a SAOL variable
yields 90db. Here's a table:

  SAOL ampl dbamp

    1.0 90dB
    0.1 70dB
    0.01 50dB
    0.001 30dB
    0.0001 10dB
    0.00001 -10dB

Note that you don't want to
pass negative x values to
dbamp, only positive ...

                                --jl

This archive was generated by hypermail 2b29 : Mon Jan 28 2002 - 12:03:54 EST