Beluga echolocation click spectra and beam pattern for on-axis clicks.

• Main Authors: Marie J. Zahn (11414012), Kristin L. Laidre (3227658), Peter Stilz (43450), Marianne H. Rasmussen (3340494), Jens C. Koblitz (11414015)
• Format: Still Image
• Language: unknown
• Published: 2021
• Subjects: Cell Biology; Neuroscience; Physiology; Ecology; Inorganic Chemistry; wider ventral beam; narrow beam width; high source levels; div >< p; calculate sonar parameters; 212 db pp; 120 meters distance; monodon monoceros </; delphinapterus leucas </; ranging animals using; acoustic programs throughout; 4 °; showing; wild belugas (<; situ </; narwhals (<; acoustic classification; 2013 using; wild belugas; west greenland; vertically scan; two locations; sea ice; scanning behavior; results provide; results indicate; recording equipment; pack ice; may differ; linear 16; findings support; evolutionary adaptation; effectively navigate; echolocation signals; clicks centered; captive contexts; captive belugas; baffin bay; axis clicks; 42 minutes; 04 hours; Baffin Bay; Greenland; Black Peak; Yellow Point; Baffin; Beluga; Beluga*; Delphinapterus leucas; Monodon monoceros; narwhal*; Sea ice
• Online Access: https://doi.org/10.1371/journal.pone.0257054.g005

(A) Beluga spectra and (B) vertical beam pattern for 12 on-axis clicks in both the vertical and horizontal planes. (C) Beluga spectra and (D) vertical beam pattern for 133 on-axis clicks in only the vertical plane. Spectra in (A) and (C) show raw spectra in gray, mean spectrum in black, peak frequency with a yellow point, and -10 dB bandwidth in red. Vertical beam patterns in (B) and (D) show raw beam patterns in gray, mean beam pattern in black, and the smoothed and normalized beam pattern in blue; negative angle values correspond to the dorsal vertical beam and positive values refer to the ventral beam.