9/14/2011 Echo Intensity in Echolocation in Bats (Pipistrellus - - PDF document

9/14/2011 1

Frequency and Amplitude Compensation in the Echolocation of Bats

Lydia Hoffstaetter and Taylor Baird September 14th, 2011 BioNB 4240

Echo Intensity in Echolocation in Bats (Pipistrellus abramus) during Flight Measured by Telemetry Microphone

• Journal of Acoustical Society of America
• Impact factor 1.587

On- board Telemetry of Emitted Sounds from Free-Flying Bats: Compensation for Velocity and Distance Stabilizes Echo Frequency and Amplitude

• Journal of Comparative Physiology A
• Impact Factor 2.0

Authors

• Shizuko Hiryu
• Yu Shiori
• Tatsuro Hosokawa
• Hiroshi Riquimaroux
• Yoshiaki Watanabe
• Tomotaka Hagino

Doshisha University, Kyotanabe, Japan

Echolocation Calls

Frequency Modulated Pulses Constant Frequency Pulses

Images from Simmons and Young, 2010

Species of Bats used in Studies

Japanese House Bat (2006) (Pipistrellus abramus) Japanese Horseshoe Bat (2008) (Rhinolophus ferrumquinum nippon)

http://www-3.unipv.it/webcib/rhino1.au

http://yokohamayomama.blogspot.com/2011/0 5/friday-field-notes-keep-your-eyes-open.html http://www.bio.bris.ac.uk/research/bats/China%20bats /rhinolophusferrumequinum.htm

http://en.wikipedia.org/wiki/Animal_echolocation

Typical Echolocation Pulse

• Pipistrellus abramus

Hiryu et. al 2006

9/14/2011 2

Typical Echolocation Patterns

• Rhinolophus ferrumequinum nippon

Hiryu, et, al 2008

Doppler Shift

http://science.howstuffworks.com/radar2.htm

Experiment Setup

8 M 3 M 2 M

Experiment Setup

• Telemike System
• Telemetry microphone

Hiryu et. al 2006

Echo Delay

Hiryu et. al 2006

Echo Delay

Hiryu et. al 2008

9/14/2011 3 Echo DelayE

Hiryu et. al 2006

Interpulse Intervals

Hiryu, et. al 2008

Amplitude Compensation

Hiryu, et. al. 2008

Amplitude Compensation

Hiryu, et. al. 2006

Amplitude Compensation

Amplitude Compensation

Hiryu et, al. 2006

Amplitude Compensation

Hiryu et. al 2006

9/14/2011 4 Frequency Compensation

Hiryu et. al 2008

Frequency Compensation Frequency Compensation

Combined Amplitude and Frequency

Hiryu et. al 2008

The U-turn

Hiryu et. al 2008

Works Cited

• Archive Greater horseshoe bat (Rhinolophus ferrumequinum). Wildscreen 2003-2011. http://www.arkive.org/greater-

horseshoe-bat/rhinolophus-ferrumequinum/

• Accessed September 13th, 2011
• Background picture from: Publications Internatonal, Ltd. http://animals.howstuffworks.com/mammals/13-incredible-bat-facts.htm
• Hiryu, S. Hagino, T. Riquimaroux, H. Wantanabe, Y. Echo-intensity compensation in echolocating bats (Pipistrellus abramus)

during flight measured by a telemetry microphone. Journal of the Acoustical Society of America. 1747-1757

• Hiryu, S. Shiori, Y. Hosokawa, T. Riquimaroux, H. Wantanabe, Y. On Board Telemetry of Emitted Sounds from free-flying bats:

Compensation for velocity and distance stabalize echo frequency. Journal of Comparative Physiology A 2008. 194: 841-851

• Information for authors found at Doshisa University, ReaD

http://read.jst.go.jp/public/cs_ksh_008EventAction.do?action4=event&lang_act4=E&judge_act4=2&knkysh_name_code=60000105 21, and Research Gate http://www.researchgate.net/researcher/39310937_Shizuko_Hiryu

• Riquimaroux, H. Personal Information. Doshisha University 2005.

http://kenkyudb.doshisha.ac.jp/rd/search/researcher/195002/index-e.html

• Simmons, Nancy Rhinolophus ferrumequinum, Greater Horseshoe Bat. Digital Morphology.

http://www.digimorph.org/specimens/Rhinolophus_ferrumequinum/whole/ Accessed Sept. 13th, 2011.

• Simmons, P. and Young, D. Nerve Cells and Animal Behaviour. 3rd Edition. Cambridge University Press. The Edinburgh

University Building, Cambridge. 2010.