DEMON Acoustic Ship Signature Measurements in an Urban Harbor
Figure 7
(a) The dependence of the DEMON spectra (DEMON frequency is the vertical axis, spectral amplitude shown by color) from the carrier frequency (the horizontal axis), (b) dependence of the amplitude of DEMON frequency component 63.6 Hz on the carrier frequency, (c) SNR dependence on frequency at various measurement distances, and (d) DEMON spectrum at optimized frequency band (25–30 kHz) at short distance.
