Figure S1. Received levels and calculated source levels of walrus claps from Walruses produce intense impulse sounds by clap-induced cavitation during breeding displays

Received level of 158 clap impulses as a function of recording distance d (panel a), and source level of the same clap impulses following calculation based on propagation loss of 20 log d (panel b), a conservative measure of propagation loss in this environment. Mean back-calculated source level (at...

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Bibliographic Details
Main Authors: Ole Næsbye Larsen (11016009), Colleen Reichmuth (11016012)
Format: Other Non-Article Part of Journal/Newspaper
Language:unknown
Published: 2021
Subjects:
Ecology
Biomechanics
Animal Behaviour
sound production
acoustic impulse
amplitude
marine mammal
Odobenus rosmarus
walrus*
Online Access:https://doi.org/10.6084/m9.figshare.14832888.v1
Description
Summary:Received level of 158 clap impulses as a function of recording distance d (panel a), and source level of the same clap impulses following calculation based on propagation loss of 20 log d (panel b), a conservative measure of propagation loss in this environment. Mean back-calculated source level (at 1 m) of clap impulses is 203 dB peak-to-peak re. 1 μPa. An independent analysis showed that animal orientation (0° towards hydrophone, 90° towards window, 180° away from hydrophone) did not influence received level of clap impulses (ANOVA, F(2,153)=2.004, p=0.14); thus, the apparent source levels measured at body orientations of 0° to 180° approximate the true source levels of these signals.

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