Department of Biology

Aarhus University Seal / Aarhus Universitets segl

Professor Peter Teglberg Madsen

Biosonar adjustments to noise in echolocating Daubenton's bats

Research output: Contribution to conferencePosterResearch

Standard

Biosonar adjustments to noise in echolocating Daubenton's bats. / Foskolos, Ilias; Pedersen, Michael; Stidsholt, Laura; Uebel, Astrid Særmark; Brinkløv, Signe Marie Mygind; Beedholm, Kristian; Madsen, Peter Teglberg.

2020. Poster session presented at German Bat Research Meeting, Chiemsee, Germany.

Research output: Contribution to conferencePosterResearch

Harvard

Foskolos, I, Pedersen, M, Stidsholt, L, Uebel, AS, Brinkløv, SMM, Beedholm, K & Madsen, PT 2020, 'Biosonar adjustments to noise in echolocating Daubenton's bats', German Bat Research Meeting, Chiemsee, Germany, 10/01/2020 - 12/01/2020.

APA

Foskolos, I., Pedersen, M., Stidsholt, L., Uebel, A. S., Brinkløv, S. M. M., Beedholm, K., & Madsen, P. T. (2020). Biosonar adjustments to noise in echolocating Daubenton's bats. Poster session presented at German Bat Research Meeting, Chiemsee, Germany.

CBE

Foskolos I, Pedersen M, Stidsholt L, Uebel AS, Brinkløv SMM, Beedholm K, Madsen PT. 2020. Biosonar adjustments to noise in echolocating Daubenton's bats. Poster session presented at German Bat Research Meeting, Chiemsee, Germany.

MLA

Foskolos, Ilias et al. Biosonar adjustments to noise in echolocating Daubenton's bats. German Bat Research Meeting, 10 Jan 2020, Chiemsee, Germany, Poster, 2020.

Vancouver

Foskolos I, Pedersen M, Stidsholt L, Uebel AS, Brinkløv SMM, Beedholm K et al. Biosonar adjustments to noise in echolocating Daubenton's bats. 2020. Poster session presented at German Bat Research Meeting, Chiemsee, Germany.

Author

Foskolos, Ilias ; Pedersen, Michael ; Stidsholt, Laura ; Uebel, Astrid Særmark ; Brinkløv, Signe Marie Mygind ; Beedholm, Kristian ; Madsen, Peter Teglberg. / Biosonar adjustments to noise in echolocating Daubenton's bats. Poster session presented at German Bat Research Meeting, Chiemsee, Germany.

Bibtex

@conference{98540f563e7a4a379d7bd4f2d527a3da,
title = "Biosonar adjustments to noise in echolocating Daubenton's bats",
abstract = "Echolocating bats navigate and track their prey for capture via active sensing. To do so, they need to operate on a favorable echo-to-noise ratio (ENR) that allows them to discern target echoes from background noise and clutter. Early studies using wire experiments have demonstrated high resilience to masking in free-flying bats, but whether this is explained by spatial release from masking or complex auditory signal detection in noise remains unresolved. To test the hypothesis that bats in masking noise defend a certain ENR by increasing source levels, we trained four Daubenton{\textquoteright}s bats to approach and land on a spherical hydrophone (TS of approx. -15 dB) that also acted as an omnidirectional noisesource at four different noise levels (NL, white noise from 20-90 kHz, 60-90 dB re: 20 μPa in 10 dB steps). Behind the hydrophone, an array of seven microphones was used to localize the bats during the approach and to estimate source level (SL) from received level (RL) and range. Compared to the no-noise treatment, bats substantially increased their SL by 6 dB at a NL of 60 dB re: 20 μPa, and more so at higher noise levels, ending up with a SL around 130dB re: 20 µPa at NLs of 90 dB. We show that bats are sensitive to masking when they cannot employ spectral, temporal or spatial means to reduce such auditory interference and that they can produce very high source levels in the lab to defend ENRs good enough to perform echo-guided landings.",
keywords = "bat, echolocation, biosonar, masking",
author = "Ilias Foskolos and Michael Pedersen and Laura Stidsholt and Uebel, {Astrid S{\ae}rmark} and Brinkl{\o}v, {Signe Marie Mygind} and Kristian Beedholm and Madsen, {Peter Teglberg}",
year = "2020",
language = "English",
note = "German Bat Research Meeting ; Conference date: 10-01-2020 Through 12-01-2020",
url = "https://www.orn.mpg.de/TDFF",

}

RIS

TY - CONF

T1 - Biosonar adjustments to noise in echolocating Daubenton's bats

AU - Foskolos, Ilias

AU - Pedersen, Michael

AU - Stidsholt, Laura

AU - Uebel, Astrid Særmark

AU - Brinkløv, Signe Marie Mygind

AU - Beedholm, Kristian

AU - Madsen, Peter Teglberg

PY - 2020

Y1 - 2020

N2 - Echolocating bats navigate and track their prey for capture via active sensing. To do so, they need to operate on a favorable echo-to-noise ratio (ENR) that allows them to discern target echoes from background noise and clutter. Early studies using wire experiments have demonstrated high resilience to masking in free-flying bats, but whether this is explained by spatial release from masking or complex auditory signal detection in noise remains unresolved. To test the hypothesis that bats in masking noise defend a certain ENR by increasing source levels, we trained four Daubenton’s bats to approach and land on a spherical hydrophone (TS of approx. -15 dB) that also acted as an omnidirectional noisesource at four different noise levels (NL, white noise from 20-90 kHz, 60-90 dB re: 20 μPa in 10 dB steps). Behind the hydrophone, an array of seven microphones was used to localize the bats during the approach and to estimate source level (SL) from received level (RL) and range. Compared to the no-noise treatment, bats substantially increased their SL by 6 dB at a NL of 60 dB re: 20 μPa, and more so at higher noise levels, ending up with a SL around 130dB re: 20 µPa at NLs of 90 dB. We show that bats are sensitive to masking when they cannot employ spectral, temporal or spatial means to reduce such auditory interference and that they can produce very high source levels in the lab to defend ENRs good enough to perform echo-guided landings.

AB - Echolocating bats navigate and track their prey for capture via active sensing. To do so, they need to operate on a favorable echo-to-noise ratio (ENR) that allows them to discern target echoes from background noise and clutter. Early studies using wire experiments have demonstrated high resilience to masking in free-flying bats, but whether this is explained by spatial release from masking or complex auditory signal detection in noise remains unresolved. To test the hypothesis that bats in masking noise defend a certain ENR by increasing source levels, we trained four Daubenton’s bats to approach and land on a spherical hydrophone (TS of approx. -15 dB) that also acted as an omnidirectional noisesource at four different noise levels (NL, white noise from 20-90 kHz, 60-90 dB re: 20 μPa in 10 dB steps). Behind the hydrophone, an array of seven microphones was used to localize the bats during the approach and to estimate source level (SL) from received level (RL) and range. Compared to the no-noise treatment, bats substantially increased their SL by 6 dB at a NL of 60 dB re: 20 μPa, and more so at higher noise levels, ending up with a SL around 130dB re: 20 µPa at NLs of 90 dB. We show that bats are sensitive to masking when they cannot employ spectral, temporal or spatial means to reduce such auditory interference and that they can produce very high source levels in the lab to defend ENRs good enough to perform echo-guided landings.

KW - bat

KW - echolocation

KW - biosonar

KW - masking

M3 - Poster

T2 - German Bat Research Meeting

Y2 - 10 January 2020 through 12 January 2020

ER -