Quantcast
Latest Stories

Echoes can reveal the shape of a room



A handful of scattered microphones can create an accurate three-dimensional map of a room, Swiss and US researchers said Monday, June 17, 2013. “Our software can build a 3D map of a simple, convex room with a precision of a few millimeters,” said lead author Ivan Dokmanic, a PhD student at Switzerland’s Ecole Polytechnique Federale de Lausanne. PHOTO FROM FACEBOOK ACCOUNT OF IVAN DOKMANIC

WASHINGTON—A snap of a finger, a handful of scattered microphones and a computer algorithm are all it takes to create an accurate three-dimensional map of a room, Swiss and US researchers said Monday.

The method, described in the US journal the Proceedings of the National Academy of Sciences, measured the distance between echoes to create maps of both a university lecture room and a cathedral alcove.

With more refinement, the technique could someday lead to better ways of designing concert halls for specific acoustics, aid investigations and even help with crime-scene reconstruction, researchers said.

“Our software can build a 3D map of a simple, convex room with a precision of a few millimeters,” said lead author Ivan Dokmanic, a PhD student at Switzerland’s Ecole Polytechnique Federale de Lausanne.

The microphones did not need to be placed in precise locations in order to pick up the original sound and its echoes.

The lags between the sounds and the echoes were used by the algorithm to calculate the distance from the microphones, walls and sound source, and re-create the digital 3D shape of the room.

“Architects could use this to design rooms—for example concert halls or auditoriums—based upon the specific acoustics they would like to create,” said Dokmanic.

Forensic science could use the approach to re-create details about a room that cannot be seen, or to identify the whereabouts of a person calling from inside a room.

Some people, including the blind, can naturally detect the general shape of a room by hearing sounds within it. The same process, known as echolocation, is used by bats and dolphins to navigate in the environment.

Co-authors on the study came from Harvard University’s school of engineering.


Follow us on Facebook Follow on Twitter Follow on Twitter




Recent Stories:

Afghan hospital guard kills 3 American doctors 48 mins elapsed Ukraine FM: We are ready to fight Russia 1 hour elapsed Sharapova advances to Stuttgart quarterfinals 1 hour elapsed Career diplomat is new PH consul general in Los Angeles 2 hours elapsed Complex health care system for California’s elderly and poor explained 2 hours elapsed Kristoffer Martin: from thug to gay teen 3 hours elapsed More concessions, but still no direct hires for PBA expansion teams 3 hours elapsed Power Pinays lose to Vietnam, try to salvage 7th place 3 hours elapsed
Complete stories on our Digital Edition newsstand for tablets, netbooks and mobile phones; 14-issue free trial. About to step out? Get breaking alerts on your mobile.phone. Text ON INQ BREAKING to 4467, for Globe, Smart and Sun subscribers in the Philippines.

Tags: echoes , Science , Switzerland , technology , US

  • WeAry_Bat

    This reminds me of next next gen GPS not only based on satellites but uses the environment to locate e.g. lightning strike… but that was the only mention. Hm.



Copyright © 2014,
.
To subscribe to the Philippine Daily Inquirer newspaper in the Philippines, call +63 2 896-6000 for Metro Manila and Metro Cebu or email your subscription request here.
Factual errors? Contact the Philippine Daily Inquirer's day desk. Believe this article violates journalistic ethics? Contact the Inquirer's Reader's Advocate. Or write The Readers' Advocate:
c/o Philippine Daily Inquirer Chino Roces Avenue corner Yague and Mascardo Streets, Makati City, Metro Manila, Philippines Or fax nos. +63 2 8974793 to 94
Advertisement Advertisement
  1. Mark Caguioa lambasts Ginebra teammates on Twitter
  2. ‘Unlimited’ Internet promos not really limitless; lawmakers call for probe
  3. No truth to viral no-visa ‘chronicles’
  4. Nokia to be named Microsoft Mobile
  5. Senator wants to probe PH slow Internet connection
  6. Bam Aquino becomes Master Splinter’s son after Wiki hack
  7. Viber releases new design for iPhone, comes to Blackberry 10 for the first time
  8. New York police Twitter campaign backfires badly
  9. PH has slowest internet in Southeast Asia
  10. Did Deniece Cornejo lambast Vhong Navarro on social media?
  1. Mark Caguioa lambasts Ginebra teammates on Twitter
  2. PH has slowest internet in Southeast Asia
  3. Senator wants to probe PH slow Internet connection
  4. Enrile in Masters of the Universe, Lord of the Rings?
  5. Nokia to be named Microsoft Mobile
  6. Did Deniece Cornejo lambast Vhong Navarro on social media?
  7. Netizens seethe over Aquino’s ‘sacrifice’ message
  8. ‘Unlimited’ Internet promos not really limitless; lawmakers call for probe
  9. Facebook rolls out ‘nearby friends’ feature
  10. Nasa’s moon-orbiting robot crashes down
  1. #RejectedBbPilipinas2014Questions flood Twitter
  2. Did Deniece Cornejo lambast Vhong Navarro on social media?
  3. Netizens fall in love with Crimea prosecutor Natalia Poklonskaya
  4. Mommy Dionisia Pacquiao scores, takes over social media
  5. Nude and so dangerous
  6. Mark Caguioa lambasts Ginebra teammates on Twitter
  7. Mommy Dionisia sings ‘Riking Bull,’sends netizens ablaze
  8. PH has slowest internet in Southeast Asia
  9. Russia tries to curb Crimean prosecutor’s Internet fame
  10. Memes flourish after Pacquiao victory

News

  • Ukraine FM: We are ready to fight Russia
  • Slain officer’s ‘diagram’ rocks PNP
  • 2 contractors fined P25,000 for delays in Edsa rehab
  • Luisita beneficiaries take over renters
  • 5 years of hard work pay off for top UP grad
  • Sports

  • Sharapova advances to Stuttgart quarterfinals
  • Galedo caps ride of redemption
  • Beermen, Express dispute second semis slot today
  • Lady Agilas upset Lady Bulldogs in four sets
  • NLEX roars to 7th D-League win
  • Lifestyle

  • A brand for life
  • Wear a rainbow on your wrist
  • Wearing Kate Moss
  • Sail into summer
  • Life lessons from the Ultimate Warrior
  • Entertainment

  • Kristoffer Martin: from thug to gay teen
  • Has Ai Ai fallen deeply with ‘sireno?’
  • California court won’t review Jackson doctor case
  • Cris Villonco on play adapted from different medium
  • OMB exec’s assurance: We work 24/7
  • Business

  • Gaming stocks gain, PSEi eases on profit-taking
  • Cebu Pacific flew 3.74M passengers as of March
  • Corporate bonds sweeteners
  • Professionals in the family business
  • Foreign funds flowed out in Q1, says BSP
  • Technology

  • Vatican announces hashtag for April 27 canonizations
  • Enrile in Masters of the Universe, Lord of the Rings?
  • Top Traits of Digital Marketers
  • No truth to viral no-visa ‘chronicles’
  • ‘Unlimited’ Internet promos not really limitless; lawmakers call for probe
  • Opinion

  • Editorial Cartoon, April 25, 2014
  • No deal, Janet
  • Like making Al Capone a witness vs his gang
  • MERS-CoV and mothers
  • A graduation story
  • Global Nation

  • Afghan hospital guard kills 3 American doctors
  • Career diplomat is new PH consul general in Los Angeles
  • US4GG: Aquino should ask Obama for TPS approval, drone technology
  • Complex health care system for California’s elderly and poor explained
  • Tiff with HK over Luneta hostage fiasco finally over
  • Advertisement
    Marketplace