## VRfAmpldB

#### Routine

void VRfAmpldB (const float ampl[], float dB[], int N)

#### Purpose

Convert each value in an array of amplitudes to a decibel value

#### Description

This routine converts the elements of an array of amplitudes to decibels.

      dB[i] = 20 * log10(ampl[i]),  0 <= i < N.

The value ampl[i] must be non-negative.

#### Parameters

-> const float ampl[]
  Input amplitude array (N elements). This values must be non-negative.
<- float y[]
  Output array of decibel values (N elements). The output array can be the same as the input array.
-> int N
  Number of elements in the arrays (may be zero)

#### Author / revision

P. Kabal / Revision 1.9 2003/05/09

#### See Also

VRfLog10

Main Index libtsp