  The technique of muon mean energy determination in multilayer detectors is
developed. The mean energy is measured by means of average small bursts $m$
i.e. the number of electrons and positrons generated by muons in the detecting
layers of device via three basic processes --- creation of $e^+e^-$ pairs,
$\delta$-electrons and bremsestrahlung. The accuracy of the method is
considered.
  Key words: muon energy, multilayer detectors.
