Navigation Links
'Orca ears' inspire Stanford researchers to develop ultrasensitive undersea microphone
Date:6/23/2011

For most people, listening to the ocean means contemplating the soothing sound of waves breaking gently on a sandy beach.

But for researchers studying everything from whale migration to fisheries populations, and from underwater mapping to guiding robots trying to repair leaking undersea oil wells, listening to the ocean from the other side underwater can reveal volumes of valuable data.

Stanford researchers have developed a highly sensitive underwater microphone that can capture the whole range of ocean sounds, from the equivalent of a soft whisper in a library to an explosion of a ton of TNT just 60 feet away a range of approximately 160 decibels and do so accurately at any depth, no matter how crushing the pressure. It also can hear sound frequencies across a span of 17 octaves, spanning pitches far higher than the whine of a mosquito and far lower than a rumbling foghorn.

Existing underwater microphones called hydrophones have much more limited ranges of sensitivity and do not perform well at depth, where the ambient pressure can be extremely large, making it difficult to detect faint sounds.

Sonar using sound to locate and map is critical to underwater communication and exploration, because radio signals can travel only a centimeter or two before they dissipate in seawater and light can't penetrate the depths below about 100 meters.

In approaching the challenge of designing the new hydrophone, the researchers first examined some existing listening devices that work well underwater the ears of marine mammals, particularly orcas.

"Orcas had millions of years to optimize their sonar and it shows," said Onur Kilic, a postdoctoral researcher in electrical engineering. "They can sense sounds over a tremendous range of frequencies and that was what we wanted to do."

Kilic is the lead author of a paper about the research published in the Journal of the Acoustic Society of America earlie
'/>"/>

Contact: Louis Bergeron
louisb3@stanford.edu
650-725-1944
Stanford University
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Where will grizzly bears roam?
2. Restoring the European Beaver: 50 Years of Experience by G. Sjoberg and J.P. Ball
3. Poisonous tears
4. Alzheimers risk gene disrupts brains wiring 50 years before disease hits
5. Beware of predatory male black bears
6. University of Tennessee scientist: Flowers rapid growth rate can be traced back 65 million years
7. Drug-resistance fears for deadly fungal disease
8. Port Valdez invertebrates stabilized 26 years after quake
9. Green toad inhabited Iberian Peninsula 1 million years ago
10. Pollen also appears outside flowering season
11. Neuropsychologist proves that some blind people see with their ears
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/10/2014)... , Dec. 8, 2014 You,ve been here before: ... but can,t remember your password, site key or the answer ... your first grade teacher? Today, Hoyos ... app that will finally put an end to the ... 1U TM . 1U leverages a user,s smartphone to ...
(Date:12/10/2014)... --Research and Markets ( http://www.researchandmarkets.com/research/xclcvw/biometrics_market ) ... Market in Japan 2014-2018" report to their ... The integration of biometrics and smart ... upgradation of the driver,s license is one of ... the aforementioned projects, biometrics is being used as ...
(Date:12/4/2014)... PALM BEACH GARDENS, Fla. , Dec. 3, ... identity management solutions, today announced that its DigitalPersona ... 4500 fingerprint readers have been deployed throughout ... Carolina , South Carolina ... network headquartered in Southern Pines, North ...
Breaking Biology News(10 mins):The Password is Finally Dead: Launch of 1U Mobile App Eliminates Need for All Usernames and Passwords 2The Password is Finally Dead: Launch of 1U Mobile App Eliminates Need for All Usernames and Passwords 3Biometrics Market in Japan 2014-2018: Key Vendors are DDS, Fujitsu, Hitachi and NEC 2First Bank Partners with Crossmatch to Increase Log In Security 2First Bank Partners with Crossmatch to Increase Log In Security 3
... of us cringe at the sound of the words "parasitic ... actually good for us. , At Michigan State University, researcher ... investigating the role that parasites can play in treating inflammatory ... part of a more than $10 million National Institutes of ...
... A faster magnetic resonance imaging (MRI) data-acquisition technique will ... magnetic resonance scanner, yet deliver more precise 3-D images ... Wisconsin-Madison, the faster technique will enable clinics to image ... adults with osteoarthritis-related knee problems - and can help ...
... "dead zone" has formed off the Oregon Coast for the ... State University. , A fundamental new trend in atmospheric and ... begun, scientists say, and apparently is expanding its scope beyond ... effect of the low-oxygen zone is also being seen in ...
Cached Biology News:Parasitic worms used to fight bowel disease 2New MRI technique quickly builds 3-D images of knees 2Marine 'dead zone' off Oregon is spreading 2Marine 'dead zone' off Oregon is spreading 3
(Date:12/22/2014)... Dec. 22, 2014  ( www.competitivehealth.com ) — Competitive ... medical bill review and advocacy service, has signed an ... WellCard Savings discount health services marketplace. 63% ... more than they expected to pay. As part of ... costs, WellCard Savings is pleased to offer medical bill ...
(Date:12/22/2014)... 22, 2014 Fertility Associates of Memphis ... Bank USA , a network of more than 20 ... partnership, patients have fast access to a national pool ... IVF . Fertility Associates of Memphis is the only ... treatment option. , Dr. William Kutteh , director ...
(Date:12/19/2014)... BioPlus Specialty Pharmacy (BioPlus), one ... of Nick Maroulis, Pharm.D. to the newly created position ... In this position, Dr. Maroulis will continue to manage ... of our multi-site pharmacies as the company expands. Dr. ... that time he has served in many different capacities ...
(Date:12/19/2014)... Dec. 19, 2014 Bina Technologies, Inc. (Bina, ... that they have been acquired by Roche (SIX: RO, ... privately held company that provides a big data platform ... (NGS) data for the academic and translational research markets. ... and will continue to focus on development of their ...
Breaking Biology Technology:WellCard Savings Announces CoPatient Medical Bill Review Service for Members 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 3BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2Bina Technologies is acquired by Roche. 2Bina Technologies is acquired by Roche. 3
... Lead Discovery, COPENHAGEN, June 18 Nuevolution ... drug discovery collaboration with Merck & Co.,Inc., ... to identify novel small molecule leads against several ... uses innovative DNA,labeling to allow fragment-based drug screening ...
... HARTFORD, Conn., June 17 The Connecticut,Technology Council (CTC) ... in,partnership with accounting firm UHY LLP this November, to ... will be,recognized on the basis of revenue growth over ... and minimum revenues of $3 million in,the fourth year., ...
... Edwards Lifesciences,Corporation (NYSE: EW ), a world ... disease, is scheduled to participate in the,18th Annual ... in Nantucket, Massachusetts on Tuesday, June 24, 2008., ... president, chief,financial officer & treasurer, is scheduled to ...
Cached Biology Technology:Nuevolution Announces Research and Development Collaboration with Merck & Co. Inc. 2Connecticut Technology Council to Recognize Fast Growing Technology Companies 2Edwards Lifesciences to Present at the 18th Annual Wachovia Nantucket Equity Conference 2
Several Pichia pastoris strains are available to allow you to optimize expression and recovery of your protein of interest. Table 1 provides information to help you choose the appropriate strain....
Standard 2" or 3" Plastic can be ordered with 81 or 100 cell dividers. Mini 2" Plastics Boxes come standard with 25 cell dividers. Plastic boxes can also be ordered with corresponding freezer racks...
Request Info...
5-bromouridine 5'-triphosphate (BrUTP) *10 mM in TE buffer*...
Biology Products: