Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Echo

Echo

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, then the...

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...

You might also read

Related Articles

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

Sort by

Same author

Directional and amplitude characteristics of pulsed call sequences in captive free-swimming Pacific white-sided dolphins (Lagenorhynchus obliquidens).

The Journal of the Acoustical Society of America·2023

Same author

Erratum: Intelligibility of chimeric locally time-reversed speech: Relative contribution of four frequency bands [ JASA Express Lett. 1(6), 065201 (2021)].

JASA express letters·2022

Same author

Intelligibility of chimeric locally time-reversed speech: Relative contribution of four frequency bands.

JASA express letters·2022

Same author

Intelligibility of chimeric locally time-reversed speech.

The Journal of the Acoustical Society of America·2020

Same author

Echolocating Big Brown Bats, Eptesicus fuscus, Modulate Pulse Intervals to Overcome Range Ambiguity in Cluttered Surroundings.

Frontiers in behavioral neuroscience·2016

Same author

Individuality embedded in the isolation calls of captive beluga whales (Delphinapterus leucas).

Zoological letters·2015

Search research articles

Related Experiment Video

Updated: May 29, 2026

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

Published on: March 1, 2022

Evaluation of the echolocation model for range estimation of multiple closely spaced objects.

¹Department of Information Science, Tohoku Gakuin University, Sendai, Japan. matsuo@cs.tohoku-gakuin.ac.jp

The Journal of the Acoustical Society of America

|September 1, 2011

Summary

Bats use precise echolocation to detect objects. New methods using Gaussian chirplets improve delay time estimation for multiple objects, enhancing range resolution in bat biosonar.

More Related Videos

Using the Race Model Inequality to Quantify Behavioral Multisensory Integration Effects

Using the Race Model Inequality to Quantify Behavioral Multisensory Integration Effects

Published on: May 10, 2019

Related Experiment Videos

Last Updated: May 29, 2026

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

Published on: March 1, 2022

Using the Race Model Inequality to Quantify Behavioral Multisensory Integration Effects

Using the Race Model Inequality to Quantify Behavioral Multisensory Integration Effects

Published on: May 10, 2019

Area of Science:

Bioacoustics
Animal Sensory Systems
Signal Processing

Background:

Bats utilize frequency-modulated (FM) echolocation for object identification with sub-microsecond accuracy.
Modeling FM echolocation faces challenges in resolving delay times of closely spaced objects due to complex echo interference patterns.

Purpose of the Study:

To develop a method for accurately estimating delay times of multiple, closely spaced objects using bat echolocation.
To extract temporal changes in echo interference patterns for improved object localization.

Main Methods:

Introduction of Gaussian chirplets with carrier frequencies matching bat echolocation sweep rates.
Estimation of object delay times (T(1), T(2), etc.) by analyzing echo spectra and interference patterns.
Measurement of echoes from single and multiple objects under low signal-to-noise conditions.

Main Results:

Accurate estimation of delay time for a single object (approx. 1.3 μs).
Range accuracy achieved below 6 μs with a frequency bandwidth under 10 kHz.
Successful estimation of delay times for multiple closely spaced objects, demonstrating high range resolution.

Conclusions:

Gaussian chirplets effectively extract temporal echo information for improved bat echolocation modeling.
The proposed method enhances the ability to resolve multiple targets in complex acoustic environments.
This technique offers a significant advancement in understanding and replicating bat biosonar capabilities.