public EnergyNormaliser(double energyFactor){
  this.amplitudeFactor=Math.sqrt(energyFactor);
  this.referencePower=-1;
}

public EnergyNormaliser ( double energyFactor ) { this . amplitudeFactor = Math . sqrt ( energyFactor ) ; this . referencePower = - 1 ; }
adapt the amplitudes of a signal such that the energy changes by the given factor .
