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Lloyd's mirror effect in fin whale calls and its use to infer the depth of vocalizing animals

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Lloyd's mirror effect in fin whale calls and its use to infer the depth of vocalizing animals. / Pereira, Andreia; Harris, Danielle; Tyack, Peter; Matias, Luis.

Proceedings of Meetings on Acoustics. Vol. 27 Acoustical Society of America, 2017. (Proceedings of Meetings on Acoustics).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Harvard

Pereira, A, Harris, D, Tyack, P & Matias, L 2017, Lloyd's mirror effect in fin whale calls and its use to infer the depth of vocalizing animals. in Proceedings of Meetings on Acoustics. vol. 27, Proceedings of Meetings on Acoustics, Acoustical Society of America, 4th International Conference on the Effects of Noise on Aquatic Life 2016, Dublin, Ireland, 10/07/16. https://doi.org/10.1121/2.0000249

APA

Pereira, A., Harris, D., Tyack, P., & Matias, L. (2017). Lloyd's mirror effect in fin whale calls and its use to infer the depth of vocalizing animals. In Proceedings of Meetings on Acoustics (Vol. 27). (Proceedings of Meetings on Acoustics). Acoustical Society of America. https://doi.org/10.1121/2.0000249

Vancouver

Pereira A, Harris D, Tyack P, Matias L. Lloyd's mirror effect in fin whale calls and its use to infer the depth of vocalizing animals. In Proceedings of Meetings on Acoustics. Vol. 27. Acoustical Society of America. 2017. (Proceedings of Meetings on Acoustics). https://doi.org/10.1121/2.0000249

Author

Pereira, Andreia ; Harris, Danielle ; Tyack, Peter ; Matias, Luis. / Lloyd's mirror effect in fin whale calls and its use to infer the depth of vocalizing animals. Proceedings of Meetings on Acoustics. Vol. 27 Acoustical Society of America, 2017. (Proceedings of Meetings on Acoustics).

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@inproceedings{48e3bd9b006e4b4aa528ddf9d5d639e1,
title = "Lloyd's mirror effect in fin whale calls and its use to infer the depth of vocalizing animals",
abstract = "The ocean acoustic Lloyd's Mirror effect (LME) is produced by interference between the direct-path and the sea surface phase-reversed reflection of a sound as observed at a receiver. It results in a frequencydependent interference pattern that can be observed in a spectrogram. Many studies have found variations of spectral characteristics of the 20 Hz 'regular' fin whale call, which seem to reflect geographic differences. However, variability of spectral measurements may occur due to the LME. Using a bout of regular calls with estimated ranges, our study aimed to: 1) show and analyze differences of call features due to the LME; and 2) estimate the depth of the vocalizing whale. The composite spectrogram showed that different spectral characteristics of the calls could be identified within the same bout. We developed transmission loss models considering the LME for a fin whale call generated close to the surface and recorded at the sea bottom by an instrument. Our results suggested that some differences measured in fin whale calls could be related to the LME. Inference of depths of calling whale was not straightforward and needed to be assessed at a finer temporal scale than the full bout of calls.",
author = "Andreia Pereira and Danielle Harris and Peter Tyack and Luis Matias",
year = "2017",
doi = "10.1121/2.0000249",
language = "English",
volume = "27",
series = "Proceedings of Meetings on Acoustics",
publisher = "Acoustical Society of America",
booktitle = "Proceedings of Meetings on Acoustics",
address = "United States",

}

RIS (suitable for import to EndNote) - Download

TY - GEN

T1 - Lloyd's mirror effect in fin whale calls and its use to infer the depth of vocalizing animals

AU - Pereira, Andreia

AU - Harris, Danielle

AU - Tyack, Peter

AU - Matias, Luis

PY - 2017

Y1 - 2017

N2 - The ocean acoustic Lloyd's Mirror effect (LME) is produced by interference between the direct-path and the sea surface phase-reversed reflection of a sound as observed at a receiver. It results in a frequencydependent interference pattern that can be observed in a spectrogram. Many studies have found variations of spectral characteristics of the 20 Hz 'regular' fin whale call, which seem to reflect geographic differences. However, variability of spectral measurements may occur due to the LME. Using a bout of regular calls with estimated ranges, our study aimed to: 1) show and analyze differences of call features due to the LME; and 2) estimate the depth of the vocalizing whale. The composite spectrogram showed that different spectral characteristics of the calls could be identified within the same bout. We developed transmission loss models considering the LME for a fin whale call generated close to the surface and recorded at the sea bottom by an instrument. Our results suggested that some differences measured in fin whale calls could be related to the LME. Inference of depths of calling whale was not straightforward and needed to be assessed at a finer temporal scale than the full bout of calls.

AB - The ocean acoustic Lloyd's Mirror effect (LME) is produced by interference between the direct-path and the sea surface phase-reversed reflection of a sound as observed at a receiver. It results in a frequencydependent interference pattern that can be observed in a spectrogram. Many studies have found variations of spectral characteristics of the 20 Hz 'regular' fin whale call, which seem to reflect geographic differences. However, variability of spectral measurements may occur due to the LME. Using a bout of regular calls with estimated ranges, our study aimed to: 1) show and analyze differences of call features due to the LME; and 2) estimate the depth of the vocalizing whale. The composite spectrogram showed that different spectral characteristics of the calls could be identified within the same bout. We developed transmission loss models considering the LME for a fin whale call generated close to the surface and recorded at the sea bottom by an instrument. Our results suggested that some differences measured in fin whale calls could be related to the LME. Inference of depths of calling whale was not straightforward and needed to be assessed at a finer temporal scale than the full bout of calls.

U2 - 10.1121/2.0000249

DO - 10.1121/2.0000249

M3 - Conference contribution

VL - 27

T3 - Proceedings of Meetings on Acoustics

BT - Proceedings of Meetings on Acoustics

PB - Acoustical Society of America

ER -

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