Navigation Links
How long does a tuning fork ring?
Date:3/9/2011

This release is available in German.

From the wooden bars in a xylophone or the head of a drum, to the strings and sound box of a guitar or violin, musical instruments are the most familiar examples of mechanical resonators. The actual mechanical vibrations of these instruments create acoustic waves that we hear as sound. The purity of the emitted tone is intimately related to the decay of the vibration amplitude, that is, the mechanical losses of the system. A figure of merit for mechanical losses is the quality factor, simply called "Q", which describes the number of oscillations before the amplitude has decayed to a minute fraction of its starting value. The larger Q, the purer the tone and the longer the system will vibrate before the sound damps out.

In addition to the aesthetic examples found in a concert hall, mechanical resonators have become increasingly important for a wide variety of advanced technological applications, with such diverse uses as filtering elements in wireless communications systems, timing oscillators for commercial electronics, and cutting-edge research tools which include advanced biological sensors and emerging quantum electro- and optomechanical devices. Rather than producing pleasing acoustics, these applications rely on very "pure" vibrations for isolating a desired signal or for monitoring minute frequency shifts in order to probe external stimuli.

For many of these applications it is necessary to minimize the mechanical loss. However, it had previously remained a challenge to make numerical predictions of the attainable Q for even relatively straightforward geometries. Researchers from Vienna and Munich have now overcome this hurdle by developing a finite-element-based numerical solver that is capable of predicting the design-limited damping of almost arbitrary mechanical resonators. "We calculate how elemen
'/>"/>

Contact: Dr. Andreas Battenberg
battenberg@zv.tum.de
49-892-891-0510
Technische Universitaet Muenchen
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. Tuning graphene film so it sheds water
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
How long does a tuning fork ring?
(Date:1/14/2014)... NY (PRWEB) January 14, 2014 EquitiesIQ, ... Alliqua, Inc. (OTCQB: ALQA). Alliqua is an emerging biomedical ... serve the wound care market. , Free report download: ... restructured with a seasoned management team and Board, which ...
(Date:1/14/2014)... Canada (PRWEB) January 14, 2014 In ... its motives and methods in product development and promotion ... the industry. This mistrust, fueled by concerns about the ... fed by reports of spectacular fines to the world’s ...
(Date:1/14/2014)... 13, 2014 Bob Hainsey, a semiconductor ... 20 years in the industry, has joined SPIE, ... will serve as the society’s Science and Technology Strategist. ... SPIE as our Technology Strategist, further strengthening the technical ...
(Date:1/14/2014)... Research Triangle Park, NC (PRWEB) January 14, 2014 ... diagnostic company focusing on ultra-sensitive POC diagnostic platforms and novel ... on their first round of financing netting a total of ... first outside equity capital in the company. This group of ...
Breaking Biology Technology:EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 3Photonics R&D Leader Bob Hainsey Joins SPIE Technical Staff 2BioMedomics, Inc. Closes $690K Round of Financing 2
... 29 Reportlinker.com announces that a ... in its catalogue. , ... Broadening Market , ... diagnostic applications in the areas of ...
... Zealand, Oct. 29 ZyGEM Corp. Ltd., a provider ... life sciences applications, today announced it has entered into ... DNA extraction products to the Japanese market. This ... recent major distribution agreements for ZyGEM,s DNA extraction kits ...
... 29 Cell Therapeutics, Inc. (CTI) (Nasdaq and MTA: CTIC) management ... Thursday, October 29 at 10:00 a.m. Pacific Time. , The conference is being ... presentation will be webcast live with slides and available for replay afterwards. The ... ...
Cached Biology Technology:Reportlinker Adds Molecular Diagnostics: A Dynamic and Rapidly Broadening Market 2Reportlinker Adds Molecular Diagnostics: A Dynamic and Rapidly Broadening Market 3Reportlinker Adds Molecular Diagnostics: A Dynamic and Rapidly Broadening Market 4Reportlinker Adds Molecular Diagnostics: A Dynamic and Rapidly Broadening Market 5Reportlinker Adds Molecular Diagnostics: A Dynamic and Rapidly Broadening Market 6ZyGEM Strengthens its Worldwide Presence With New Distribution Agreement for Japan 2ZyGEM Strengthens its Worldwide Presence With New Distribution Agreement for Japan 3ZyGEM Strengthens its Worldwide Presence With New Distribution Agreement for Japan 4
(Date:4/18/2014)... researchers have published soil organic carbon sequestration rates. ... organic carbon can be sequestered by simply switching from ... there is a growing body of research with evidence ... cover crops, small grains, and forages may not be ... , "Some studies have shown that both moldboard and ...
(Date:4/17/2014)... April 17 In the most densely forested and ... reflect two centuries of human needs, values and practices. ... clearing forests for agriculture and development, have set the ... U.S. Forest Service study reports. , The report ... and management needs in the Northern United States ...
(Date:4/17/2014)... West Orange, NJ. April 16, 2014. Kessler Foundation ... for $1.8 million from the Department of Defense ... PhD, is principal investigator for the randomized, double-blinded, ... to improve bone and muscle strength after spinal ... Human Performance & Engineering Research at Kessler Foundation. ...
Breaking Biology News(10 mins):Researchers question published no-till soil organic carbon sequestration rates 2Researchers question published no-till soil organic carbon sequestration rates 3Researchers question published no-till soil organic carbon sequestration rates 4Five anthropogenic factors that will radically alter northern forests in 50 years 2Five anthropogenic factors that will radically alter northern forests in 50 years 3Kessler Foundation awarded Department of Defense grant for spinal cord injury research 2
... more about a tumor,s underlying biology, personalized medicine ... This year, the American Association for ... in Cancer Therapeutic Development: Challenges and Horizons conference ... Colo. This meeting regularly draws representatives from academia ...
... Pancreatic cancers use the sugar fructose, very common in ... drives cell division, helping the cancer to grow more quickly, ... has found. Although it,s widely known that cancers use ... the first time a link has been shown between fructose ...
... August 3rd, as part of the Ecological Society ... of scientists will discuss the environmental impacts of ... some of the most diverse habitats on the ... altered by mountaintop removal and valley fill mining. ...
Cached Biology News:Pancreatic cancers use fructose, common in the Western diet, to fuel their growth 2Pancreatic cancers use fructose, common in the Western diet, to fuel their growth 3Ecologists to discuss impacts of mountaintop mining at special ESA symposium 2Ecologists to discuss impacts of mountaintop mining at special ESA symposium 3
... Probes EnzChek Pyrophosphate Detection Kit,provides a ... measuring the inorganic pyrophosphate (PPi ) ... such as DNA and,RNA polymerizations, cyclic ... and the enzymatic activation of fatty ...
... is an intracellular marker normally present at ... subpopulation of bone marrow prelymphocytes. Elevated levels ... TdT cells are found to be associated ... of TdT thus provides a useful adjunct ...
... NOT FREEZE. Nuclear matrix proteins (NMPs) make up ... are associated with such functions as DNA replication, ... nuclear matrix has been shown to be highly ... known that cell death releases soluble nuclear matrix ...
Recombinant Cat Interferon Alpha Activity: 2.7 x 10 7 u/mg...
Biology Products: