• Audio
  • Live tv
  • About Us
  • Contact Us
  • Privacy Policy
  • Terms of Service
Wednesday, September 27, 2023
Morning News
No Result
View All Result
  • Login
  • Home
  • News
    • Local
    • National
    • World
  • Markets
  • Economy
  • Crypto
  • Real Estate
  • Sports
  • Entertainment
  • Health
  • Tech
    • Automotive
    • Business
    • Computer Sciences
    • Consumer & Gadgets
    • Electronics & Semiconductors
    • Energy & Green Tech
    • Engineering
    • Hi Tech & Innovation
    • Machine learning & AI
    • Security
    • Hardware
    • Internet
    • Robotics
    • Software
    • Telecom
  • Lifestyle
    • Fashion
    • Travel
    • Canadian immigration
  • App
    • audio
    • live tv
  • Home
  • News
    • Local
    • National
    • World
  • Markets
  • Economy
  • Crypto
  • Real Estate
  • Sports
  • Entertainment
  • Health
  • Tech
    • Automotive
    • Business
    • Computer Sciences
    • Consumer & Gadgets
    • Electronics & Semiconductors
    • Energy & Green Tech
    • Engineering
    • Hi Tech & Innovation
    • Machine learning & AI
    • Security
    • Hardware
    • Internet
    • Robotics
    • Software
    • Telecom
  • Lifestyle
    • Fashion
    • Travel
    • Canadian immigration
  • App
    • audio
    • live tv
No Result
View All Result
Morning News
No Result
View All Result
Home Tech Hardware

Dolphin-inspired compact sonar for enhanced underwater acoustic imaging

author by author
January 19, 2023
in Hardware, Software
Reading Time: 4 mins read
0 0
A A
0
0
SHARES
19
VIEWS
Share on FacebookShare on TwitterLinkedinReddit
Dolphin-inspired compact sonar for enhanced underwater acoustic imaging
The compact sonar comprises three sound transmitters which emit sharp, impulsive click sounds similar to a dolphin’s echolocation. Credit: National University of Singapore

Underwater imaging sonars are an essential technology for ocean exploration. Biomimetic sonars that are inspired from marine mammals such as dolphins are an emerging development in this field. A team of scientists from the National University of Singapore (NUS) Tropical Marine Science Institute (TMSI) has developed a dolphin-inspired compact sonar with a novel echo processing method that allows for clearer visual imaging underwater compared to the conventional signal processing method of visualizing sound echoes.

The sonar incorporates information on the sparsity of objects which helps interpret sound echoes better. This processing method is based on the hypothesis that dolphins use prior information about their environment, apart from broadband sound pulses, to interpret their echoes.

Compared to other sonars of similar sizes and purposes, the sonar developed by the NUS team provides a better trade-off between sonar-image clarity, the number of sensors and the size of the sensor array used. Conventional methods of processing sound echoes usually break down when sensors are too few or spread out. However, the sonar processing method developed by the NUS researchers will be able to extract information and still yield image clarity in such a scenario.

The study was published in Communications Engineering in 2022.

Dolphin-inspired sonar interpretation

The scientists observed that dolphins were able to acoustically scan objects underwater and pick matching objects visually. This demonstrated that a dolphin’s sound echoes emitted off an object contained information of the object’s shape. They then recorded dolphin echoes emitted when scanning an object underwater.

Dolphin-inspired compact sonar for enhanced underwater acoustic imaging
Sparsity-aware processing produces clearer biomimetic-sonar data visualisations (images e and f) than those produced via conventional image processing methods (images c and d). The original objects can be seen in a and b. Credit: National University of Singapore

Based on their observations, the team built a biomimetic sonar that replicated a dolphin’s sonar. The sonar, which is about 25 cm in width and around the size of a dolphin’s head, is designed to emit sharp, impulsive click sounds similar to a dolphin’s echolocation. Three transmitters are used to send sounds from different directions. The researchers then processed the sounds from both the dolphin and their sonar to visualize what the echoes revealed about the object shape.

To complement the hardware, the team came up with an innovative software that allowed the sonar to improve the visualization of the echoes. Based on the hypothesis that dolphins use prior information to process their echoes, the researchers incorporated the concept of sparsity into the sonar’s software. This assumes that out of the space scanned, only a small percentage is occupied by the object.

“Using prior information, such as the idea of sparsity, is intuitive. It is something humans do all the time—we turn our understanding of reality into expectations that can speed up our inferences and decisions. For example, in the absence of other information, the human brain and vision system tend to assume that in an image, the light on an object will be falling from above,” said Dr. Hari Vishnu, senior research fellow at NUS TMSI.

The effectiveness of the software was demonstrated when it was able to visualize information from a dolphin’s sonar echoes when scanning an object, as well as sonar signals produced by their compact sonar. A conventional approach of processing both sonar echoes resulted in noisy images. However, the novel processing approach gave better resolution and therefore sharper images. The software is also able to generate visualizations with a mere three clicks from the sonar, thus allowing it to be operationally fast.

The new sonar processing method could have potential benefits in underwater commercial or military sonars. For example, it could be used to scan the seabed to search for features that can be used to aid navigation. The sonar’s compactness also makes it suitable to be mounted on underwater robots for ocean exploration.

More information:
Hari Vishnu et al, A dolphin-inspired compact sonar for underwater acoustic imaging, Communications Engineering (2022). DOI: 10.1038/s44172-022-00010-x

Provided by
National University of Singapore

Citation:
Dolphin-inspired compact sonar for enhanced underwater acoustic imaging (2023, January 19)
retrieved 19 January 2023
from https://techxplore.com/news/2023-01-dolphin-inspired-compact-sonar-underwater-acoustic.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.
Tags: dolphinshuman brainpotential benefitssonar
Previous Post

Alec Baldwin To Be Charged With Involuntary Manslaughter Over ‘Rust’ Shooting That Killed Halyna Hutchins

Next Post

Chris Evans And Alba Baptista Are In A ‘Serious’ Relationship, Source Says

Related Posts

Machine learning & AI

Study: Machine learning models cannot be trusted with absolute certainty

September 19, 2023
11
Hardware

Team designs four-legged robotic system that can walk a balance beam

September 18, 2023
12
Next Post
Chris Evans, Alba Baptista.

Chris Evans And Alba Baptista Are In A ‘Serious’ Relationship, Source Says

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

POPULAR TODAY

A nurse puts a blood pressure cuff on a woman.
Health

High Blood Pressure at 18 Puts You at Higher Risk for Heart Attack at Midlife

by author
September 26, 2023
0
15

Share on PinterestMaskot/Getty Images 1188431815 health clinic, high blood pressure Maskot/Getty ImagesAdolescents and young adults with high blood pressure had...

The peak of the Matterhorn is pictured during sunrise, Tuesday, July 14, 2015. (Dominic Steinmann/Keystone via AP)

DNA tests confirm the body found on a Swiss glacier is of a German mountaineer missing since 1986

September 26, 2023
15
A person holding the drug Mounjaro.

Mounjaro Superior to Ozempic for Blood Sugar and Weight Loss, Study Finds

September 26, 2023
15

He rescued her when she was 3 in 1944, now, the two meet in Ottawa for the first time since then

September 26, 2023
15

9 people injured in Florida beach boardwalk shooting

September 26, 2023
14

POPULAR NEWS

Wildfire battles continue as heat, air quality alerts affect most of Canada

July 9, 2023
578

This chart went viral in response to news that credit-card debt hit $1 trillion

September 22, 2023
38

Scientists point the way to a sustainable circular economy for plastics

September 21, 2023
17

Drones navigate unseen environments with liquid neural networks

September 22, 2023
16

Akwesasne police detain 13 people suspected of trying to cross illegally into U.S.

September 23, 2023
16

EDITOR'S PICK

A box of Wegovy medication seen in close up.
Health

Wegovy Reduced Heart Failure Symptoms, New Study Finds

by author
August 29, 2023
0
15

Share on PinterestA new study found that Wegovy helped reduce heart failure symptoms. The study was funded by Novo Nordisk....

Read more

Bill Hader Refuses To Sign ‘Star Wars’ Merch: ‘Autograph People Hate Me’

Travelers to UK face long waits amid systems problem affecting electronic gates

Gold prices notch their best week since April after U.S. inflation reports

Ontario professor part of NASA’s geology team for Artemis III moon mission

Morning News

Welcome to our Ads

Create ads focused on the objectives most important to your business Please contact us info@morns.ca

End Homelessness.

you can give to funds under our care to End Homelessness and to support a cause, a current event, a remembrance for a fundraising initiative.

Please Support Us

Recent Comments

    Most Comments

    Economy

    .Biden targets ‘surprise fees’ from airlines: ‘You should know the full cost of your ticket right when you’re comparison shopping’.

    September 27, 2022
    13
    Economy

    .Fed’s Mester says inflation is going to remain hard to predict.

    September 27, 2022
    11
    Economy

    .Congress faces Friday deadline for averting government shutdown, as senators grapple with Manchin’s permitting plan.

    September 27, 2022
    14
    Economy

    .Biden’s plan to cancel student loans will cost $400 billion, CBO estimates.

    September 27, 2022
    11
    Economy

    .Michigan Democratic lawmaker’s staff has become first U.S. congressional office to form union.

    September 27, 2022
    12
    Load More
    • Home
    • Audio
    • Live tv
    • About Us
    • Contact Us
    • Privacy Policy
    • Terms of Service

    © 2022 Morning News - morns.ca by morns.ca.

    No Result
    View All Result
    • Home
    • News
      • Local
      • National
      • World
    • Markets
    • Economy
    • Crypto
    • Real Estate
    • Sports
    • Entertainment
    • Health
    • Tech
      • Automotive
      • Business
      • Computer Sciences
      • Consumer & Gadgets
      • Electronics & Semiconductors
      • Energy & Green Tech
      • Engineering
      • Hi Tech & Innovation
      • Machine learning & AI
      • Security
      • Hardware
      • Internet
      • Robotics
      • Software
      • Telecom
    • Lifestyle
      • Fashion
      • Travel
      • Canadian immigration
    • App
      • audio
      • live tv
    • Login

    © 2022 Morning News - morns.ca by morns.ca.

    Welcome Back!

    Sign In with Facebook
    Sign In with Google
    Sign In with Linked In
    OR

    Login to your account below

    Forgotten Password?

    Retrieve your password

    Please enter your username or email address to reset your password.

    Log In