Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Echo01:06

Echo

1.0K
The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...
1.0K
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

789
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
789
Interference: Path Lengths01:10

Interference: Path Lengths

2.3K
Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
2.3K
Sound Waves: Interference00:53

Sound Waves: Interference

4.8K
Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure waves. When two identical waves from the same source superimpose on each other, the combination of two crests or two troughs results in amplitude reinforcement known as constructive interference. If two identical waves, that are initially in phase, become out of phase because of different path lengths, the combination of crests with troughs...
4.8K
Parallel Resonance01:23

Parallel Resonance

618
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
618
Convergent Evolution01:54

Convergent Evolution

33.2K
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
33.2K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Theory of Acoustic Emission From Phase Transformations.

Journal of research of the National Bureau of Standards (1977)·2021
Same author

Direct visualization of particle attachment to a pendant drop.

Soft matter·2017
Same author

Further comments on the induction of lung tumors by plutonium dioxide in beagles.

Health physics·2012
Same author

A microdosimetric reassessment of new data on the effects of plutonium dioxide inhalation by beagle dogs.

Radiation research·2010
Same author

Response to 'More on the risk of cancer among nuclear workers'.

Journal of radiological protection : official journal of the Society for Radiological Protection·2009
Same author

Response to "Commentary: what can epidemiology tell us about risks at low doses?".

Radiation research·2008

Related Experiment Video

Updated: Feb 17, 2026

Multiplexing Focused Ultrasound Stimulation with Fluorescence Microscopy
08:39

Multiplexing Focused Ultrasound Stimulation with Fluorescence Microscopy

Published on: January 7, 2019

8.7K

Noise interference with echo delay discrimination in bat biosonar.

J A Simmons1

  • 1Department of Neuroscience, Brown University, 185 Meeting Street, Providence, Rhode Island 02912, USA.

The Journal of the Acoustical Society of America
|December 3, 2017
PubMed
Summary
This summary is machine-generated.

Big brown bats use echolocation to detect objects. These bats can compensate for background noise by increasing their vocalizations, allowing them to maintain performance in challenging acoustic environments.

More Related Videos

Determining Ultrasonic Vocalization Preferences in Mice using a Two-choice Playback Test
08:16

Determining Ultrasonic Vocalization Preferences in Mice using a Two-choice Playback Test

Published on: September 3, 2015

12.0K
Wideband Optical Detector of Ultrasound for Medical Imaging Applications
08:21

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Published on: May 11, 2014

11.8K

Related Experiment Videos

Last Updated: Feb 17, 2026

Multiplexing Focused Ultrasound Stimulation with Fluorescence Microscopy
08:39

Multiplexing Focused Ultrasound Stimulation with Fluorescence Microscopy

Published on: January 7, 2019

8.7K
Determining Ultrasonic Vocalization Preferences in Mice using a Two-choice Playback Test
08:16

Determining Ultrasonic Vocalization Preferences in Mice using a Two-choice Playback Test

Published on: September 3, 2015

12.0K
Wideband Optical Detector of Ultrasound for Medical Imaging Applications
08:21

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Published on: May 11, 2014

11.8K

Area of Science:

  • Bioacoustics
  • Animal Behavior
  • Sensory Neuroscience

Background:

  • Echolocating bats navigate and hunt using self-generated sound pulses and their returning echoes.
  • Discrimination of echo delay is crucial for determining range and detecting objects.

Purpose of the Study:

  • To investigate the impact of noise on the echo-delay discrimination abilities of big brown bats (Eptesicus fuscus).
  • To determine the bats' compensatory strategies in response to increasing noise levels.

Main Methods:

  • Bats were trained in a two-choice task to discriminate echo delay differences.
  • Noise was introduced at increasing amplitudes to assess performance thresholds.
  • Bat vocalization amplitude and duration were monitored during noise exposure.

Main Results:

  • Bats could discriminate echo delays with thresholds comparable to previous studies.
  • Bats increased broadcast amplitude and duration to compensate for noise, extending performance to higher noise levels.
  • At low signal-to-noise ratios, performance was limited by side-peak ambiguity in delay accuracy.

Conclusions:

  • Big brown bats exhibit robust echo-delay discrimination capabilities.
  • Vocalization compensation is a key strategy enabling bats to maintain echolocation performance in noisy environments.
  • Side-peak ambiguity significantly impacts echo-delay accuracy at low signal-to-noise ratios.