The matched reassignment applied to echolocation data

Previous studies have shown that measurements of beluga whale (Delphinapterus leucas) and bottlenose dolphin (Tur-siops truncatus) echolocation signals at off-axis angles may be well modeled using a Gaussian bell function or a chirped Gaussian function as envelope. In this paper, we apply a novel te...

Full description

Bibliographic Details
Published in:ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
Main Authors: Sandsten, Maria, Brynolfsson, Johan, Reinhold, Isabella, Starkhammar, Josefin
Format: Book Part
Language:English
Published: IEEE - Institute of Electrical and Electronics Engineers Inc. 2019
Subjects:
Probability Theory and Statistics
Signal Processing
time-frequency localization
reassignment
transient
envelope model
echolocation signals
Beluga
Beluga whale
Beluga*
Delphinapterus leucas
Online Access:https://lup.lub.lu.se/record/102564a1-2044-4351-ae2c-bd2bd8f5691e
https://doi.org/10.1109/ICASSP35589.2019
Description
Summary:Previous studies have shown that measurements of beluga whale (Delphinapterus leucas) and bottlenose dolphin (Tur-siops truncatus) echolocation signals at off-axis angles may be well modeled using a Gaussian bell function or a chirped Gaussian function as envelope. In this paper, we apply a novel technique, the matched window reassignment, for investigation of a range of models of dolphin echolocation transients. Using a set of parameterized skewed envelopes and a dictionary-based estimation algorithm, it is shown that the Rényi entropy can be used as an evaluation measure of the model fit. Acoustic recordings from an array of hydrophones of a beluga's echolocation signal are investigated, where the Gaussian envelope frequency modulation function resulted in the lowest Rényi entropy mean and the two-parametric Gum-bel model showed the best observed fit.

Similar Items