Strategies for an echolocating FM bat, Pipistrellus abramus, to listen to weak echoes

2015 ◽  
Vol 138 (3) ◽  
pp. 1740-1740
Author(s):  
Hiroshi Riquimaroux
Keyword(s):  
Fm Bat

Recovery Cycle of Inferior Collicular Neurons Determine Pulse Following Rate in CF-FM Bat*

2010 ◽  
Vol 37 (7) ◽  
pp. 801-808 ◽  
Author(s):  
Jia TANG ◽  
Zi-Ying FU ◽  
PHILIP H.-S. JEN ◽  
Qi-Cai CHEN
Keyword(s):  
Recovery Cycle ◽  
Fm Bat ◽  
Inferior Collicular

Coding of directional information by single neurones in the S-segment of the FM bat, Myotis lucifugus

1980 ◽  
Vol 87 (1) ◽  
pp. 203-216
Author(s):  
P. H. Jen
Keyword(s):  
Single Unit ◽  
Median Plane ◽  
Myotis Lucifugus ◽  
Directional Information ◽  
Stimulus Pulse ◽  
Fm Bat ◽  
Single Neurones ◽  
The Relationship ◽  
Correct Level ◽  
Stimulus Direction

1. Response parameters of S-segment neurones of the FM bat Myotis lucifugus were measured as a sound was delivered from different azimuthal angles around the animal's head. 2. The response parameters investigated were the amplitude and threshold of the evoked potential (N3) of the S-segment, together with the threshold, latency and number of impulses (per stimulus pulse) of single units. 3. All the neurones studied had their lowest thresholds either at 20-40 degrees contralateral, or 20-40 degrees ipsilateral or at the front (0 degrees). 4. The amplitude of the sound affected the relationship between stimulus direction and the amplitude of a non-monotonic N3, and the relationship between stimulus direction and the number of impulses of a non-monotonic single unit. It had so such effects with a monotonic N3 and a monotonic single unit. 5. From a study of N3 amplitudes and numbers of impulses of single neurones, it appeared that an azimuthal difference as small as 3 degrees could be easily coded at a 95% correct level with stimuli presented at around 20 degrees ipsilateral, 20 degrees contralateral, and at the front. 6. The inter-aural pressure difference (IPD), which is considered an essential cue for echolocation in Myotis (Shimozawa et al. 1974), changed linearly with angle from 0 to 40 degrees lateral at a rate of 0.4 dB/degree for sounds between 33.5 and 49.0 kHz. 7. Assuming the just-detectable IPD to be 0.5 dB (as in man), the minimum detectable azimuthal difference of Myotis around the median plane would be 1.25 degrees.

scholarly journals Rapid frequency control of sonar sounds by the FM bat, Miniopterus fuliginosus, in response to spectral overlap

2016 ◽  
Vol 128 ◽  
pp. 126-133 ◽  
Author(s):  
Kazuma Hase ◽  
Takara Miyamoto ◽  
Kohta I. Kobayasi ◽  
Shizuko Hiryu
Keyword(s):  
Frequency Control ◽  
Spectral Overlap ◽  
Fm Bat ◽  
Miniopterus Fuliginosus

Jamming Signals for FM Bat Echolocation

1974 ◽  
Vol 55 (2) ◽  
pp. 479-479
Author(s):  
James A. Simmons ◽  
W. A. Lavender ◽  
B. A. Lavender
Keyword(s):  
Fm Bat
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