Apparatus and associated method for identifying defects on objects provide
for--under computer driving--the AC voltage energization of at least one
transmitting coil to be simultaneously effected by a carrier signal, and
for an essentially amplitude-modulated received signal to be received by
means of at least one receiving coil; what is carried out, furthermore,
is a demodulation not only of the carrier signal contained in the
received signal by means of magnitude and phase formation, but also a
demodulation of the harmonics of the carrier which are contained in the
received signal, likewise by means of respectively associated magnitude
and phase formation, to be precise preferably by using a Fourier or
wavelet transformation method.