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:10/31/2014)... 2014  Tavistock Development Co. (TDC), a diversified ... groundbreaking of the GuideWell Innovation Center ... The 92,000-square-foot, three-story facility is the first multi-tenant ... designed specifically for life sciences, health innovation, and ... 650-acre Lake Nona Medical City, near the Sanford-Burnham ...
(Date:10/30/2014)... , October 30, 2014 Investor-Edge ... Inc. (NYSE MKT: ONVO), Medivation Inc. (NASDAQ: ... Synthetic Biologics Inc. (NYSE MKT: SYN), and Ironwood Pharmaceuticals ... can be accessed at: http://investor-edge.com/register . ... at 4,549.23, down 0.33%, the Dow Jones Industrial Average ...
(Date:10/30/2014)... October 30, 2014 2014 Deep ... Industryā€¯ is a professional and in-depth research report ... basic Naltrexone HCL information, including its definition, classification, ... industry overview. This research covers the international market ... global industry analysis covering macroeconomic environment & economic ...
(Date:10/30/2014)... Diego, CA (PRWEB) October 30, 2014 ... announced today that they have manually curated public data ... and non profit customers. the data is now ... manually curates and unifies public and internal data sources ... value and knowledge out of the data that becomes ...
Breaking Biology Technology:GuideWell Innovation Center Groundbreaking Hosted by Tavistock Development Company at Lake Nona Medical City 2GuideWell Innovation Center Groundbreaking Hosted by Tavistock Development Company at Lake Nona Medical City 3Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 2Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 3Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 4Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 5Naltrexone HCL Market & Nalbuphine HCL Industry Analysis for Global, China Regions Now at DeepResearchReports.com 2Naltrexone HCL Market & Nalbuphine HCL Industry Analysis for Global, China Regions Now at DeepResearchReports.com 3Rancho BioSciences Manually Curated TCGA Data Sets Available 2
... Phytomedics Inc., a clinical,stage biopharmaceutical company developing ... it will present at the,Wachovia 2008 Healthcare Conference ... p.m. ET., Among the topics of the ... and business developments, including Phase III development,activities related ...
... (OTC:,NNLX - News) a nano-biotechnology company is pleased ... development at a,Welch,s juice plant in Pennsylvania has ... Allegheny Front" - Environmental Radio for Western,Pennsylvania". The ... aired,January 23rd on WYEP- FM, a listener-supported public ...
... Corporation today,announces that Mr. Mark Ostrowski has joined ... Mr. Ostrowski will be responsible for overseeing,the growth ... and,marketing efforts in support of the substantial momentum ... has more than 17 years experience in biotechnology ...
Cached Biology Technology:NanoLogix's Hydrogen-From-Waste Technology at Welch's Foods Featured on Environmental Radio Program 2Mark Ostrowski Joins GenVault as Vice President of Sales and Marketing 2
(Date:10/30/2014)... news release is available in German . ... as individuals prompt our fellow humans to behave socially? ... social dilemmas in game theory. Previous studies assumed that ... groups. Nonetheless, scientists from the Max Planck Institute for ... can exert an influence on the cooperative behaviour of ...
(Date:10/30/2014)... New York | Heidelberg, 30 October 2014 Biological ... a better understanding of adsorption of solution ions ... biological cells. Now, a new study provides a ... and surrounding solution ions. Joanna Kotyńska and Zbigniew ... the authors of a study describing these findings, ...
(Date:10/29/2014)... date, researchers have used DNA sequencing to uncover dozens ... Buxbaum, Ph.D., Icahn School of Medicine at Mount Sinai, ... Harvard and MIT, and their colleagues examined more than ... people. They identified changes in 107 genes that are ... disorder (ASD) – a jump from the nine genes ...
Breaking Biology News(10 mins):Together we are strong -- or insufferable 2Together we are strong -- or insufferable 3Together we are strong -- or insufferable 4Ion adsorption matter in biology 2
... when combined, could be involved in the earliest stages ... targeted therapies aimed at slowing or preventing the onset ... normal gene in a tumor cell a gene ... reactivated," says David Jones, Ph.D., professor of oncological sciences ...
... TV knows that forensic scientists can use DNA profiling ... scene, establish a paternity link or help free an ... known but rapidly growing application of DNA profiling is ... genealogy. The laboratories performing this testing often differ in ...
... team at the Stowers Institute has discovered how the expression ... in a specific segment of the developing brain. The findings ... some of its unique and important structures. The ... Proceedings of the National Academy of Science today. ...
Cached Biology News:Newly found enzymes may play early role in cancer 2NIST guides genetic genealogy labs toward improved accuracy 2Krumlauf Lab demonstrates modulation of gene expression by protein coding regions 2
... System (Ruggedized Advanced Pathogen Identification Device) ... designed for field hospitals, mobile laboratories ... to its ruggedness, it is designed ... as the LightCycler instrument. By taking ...
... cDNA Library Panels were designed for full-length ... of PCRs to identify the desired cDNA ... in a 96-well "Master Plate," where each ... Having identified the positive well(s) by gel ...
... for its amino acid acceptor activity using aminoacyl-tRNA ... Asp, Gly, Ile, Lys, Pro, Thr, Val, Arg, ... Definition: One unit will yield an A 260 ... (1 cm light path). Physical Form: ...
... Unique, compact measuring instrument for calibrating ... compact design and the robust carrying case, ... both in the laboratory and on-site at ... easy to use because the individual channels ...
Biology Products: