The Journal of the Acoustical Society of America (1973)

DOI: 10.1121/1.1914435


Besides the already known low‐frequency components of the Phocoena echolocation pulse, a narrow‐band pulse of 0.1‐msec duration, with the main energy between 110 and 150 kHz and a source level of 40 dB re 1 μbar at 1 m has been found. The properties of this pulse can explain how wires below 1‐mm diam can be detected by echolocation. The results are consistent with the hypothesis that the emission is restricted to a narrow beam.