Filters
Results 1 - 10 of 1382
Results 1 - 10 of 1382.
Search took: 0.02 seconds
Sort by: date | relevance |
AbstractAbstract
[en] In this device the ambient background noise is unceasingly measured by means of piezoelectric pick-ups and is compared against a reference voltage in a comparator that controls the measuring instrument
[fr]
Ce dispositif mesure en permanence le bruit de fond ambiant par le moyen de capteurs piezoelectriques, le compare a une tension de reference dans un comparateur qui commande l'appareil de mesureOriginal Title
Dispositif d'activation d'un appareil de mesure d'emission acoustique par detection du bruit de fond
Primary Subject
Source
15 Jan 1982; 7 p; FR PATENT DOCUMENT 2486654/A/; Available from Institut National de la Propriete Industrielle, Paris (France)
Record Type
Patent
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Basic terms of acoustic emission analysis are discussed. Some primary noise sources are mentioned, some aspects of application considered. (author)
Original Title
Grundlagen der Schallemissionsanalyse zur zerstoerungsfreien Werkstoffpruefung und Ueberwachung
Primary Subject
Record Type
Journal Article
Journal
Kernenergie (Berlin); ISSN 0023-0642;
; v. 27(8); p. 350-351

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Primary Subject
Source
Available from http://dx.doi.org/10.3367/UFNe.0181.201111m.1228; Abstract only; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Physics Uspekhi; ISSN 1063-7869;
; v. 54(11); p. 1186-1192

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] In the Arctic, warming and concomitant reductions in sea ice will affect the underwater soundscape, with the greatest changes likely being linked to anthropogenic activities. In this study, an acoustic recorder deployed on an oceanographic mooring in western Fram Strait documented the soundscape of this area, which is important habitat for the Critically Endangered Spitsbergen bowhead whale population. The soundscape was quasi-pristine much of the year, with low numbers of ships traversing the area. However, during summer/autumn, signals from airgun surveys were detected > 12 h/day. Mean received peak-to-peak SPLs for loud airgun pulses reached 160.46 ± 0.48 dB 1 μPa when seismic-survey ships were close (at ~ 57 km). Bowhead whales were present almost daily October–April in all years, with singing occurring in almost every hour November–March. Currently, loud anthropogenic sound sources do not temporally overlap the peak period of bowhead singing. This study provides important baseline data for future monitoring. - Highlights: • At present, underwater sound levels in western Fram Strait are low to moderate (< 60 dB). • Shipping activity is low, but seismic surveys occur nearby in summer/autumn. • Critically endangered bowhead whales are present in the area throughout most of the year. • Currently, little human activity overlaps with bowhead winter occurrence.
Primary Subject
Source
S0025-326X(17)30754-3; Available from http://dx.doi.org/10.1016/j.marpolbul.2017.09.019; Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The application of statistical pattern recognition methods in Liquid Metal Fast Breeder Reactors surveillance is investigated. The study of the acoustic behavior of the sodium gives encouraging results as well in ''in situ'' experiment as in simulation test loop. 5 refs
Primary Subject
Source
Anon; p. 121-123; 1980; p. 121-123; Institute of Electrical and Electronic Engineers; Piscataway, NJ; 5. international conference on pattern recognition; Miami, FL, USA; 1 - 4 Dec 1980
Record Type
Book
Literature Type
Conference
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Scientific measurements of sound generation and radiation by musical instruments are surprisingly hard to correlate with the subtle and complex judgments of instrumental quality made by expert musicians
Primary Subject
Source
(c) 2014 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
AbstractAbstract
No abstract available
Primary Subject
Source
(c) 2014 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
AbstractAbstract
[en] During the latest expedition, one part of a three-leg international scientific cruise conducted earlier this year in waters about 480 km north of San Juan, Puerto Rico, Sandia engineers deployed 17 instrument packages - one of which was a wireless data communications system that successfully transmitted signals through 30 m of ocean-floor sediment and nearly 8 km of seawater. The wireless data system was contained in missile-shaped penetrators that fell to the ocean floor so they could gather information during the scientific expedition to help determine the feasibility of burying high-level radioactive wastes beneath the seafloor. Advantages of the new system are discussed
Primary Subject
Record Type
Journal Article
Journal
Sea Technology; ISSN 0093-3651;
; v. 25(11); p. 40-42

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Coulter, R. L.
Argonne National Lab., IL (United States). Funding organisation: US Department of Energy (United States)2002
Argonne National Lab., IL (United States). Funding organisation: US Department of Energy (United States)2002
AbstractAbstract
[en] This overview of the uses of sodars in meteorological applications categorizes the applications by signal source, specifically amplitude, frequency, or ''visualization'' for example, of vertical time sections of signal amplitude. Examples are shown of data derived from each category. A final section presents the potential for using groups of sodars in networks with other instruments to estimate quantities such as divergence
Primary Subject
Source
15 May 2002; [vp.]; W-31-109-ENG-38; Available from www.osti.gov/servlets/purl/795843-yny9xN/native/
Record Type
Miscellaneous
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The results of sounding of the atmospheric boundary layer (ABL) at a height of 240...700 m through an acoustic generator of a hail suppression system are presented. The spatial-temporal variability of the thin-layered structure of the ABL is shown
Original Title
Zondirovaniye atmosfernogo pogranichnogo sloya s pomoshyu protivogradovogo akusticheskogo generatora
Primary Subject
Source
Available from National Academy of Sciences of Armenia, also available online from: http://tech.asj-oa.am/4252/
Record Type
Journal Article
Journal
Izvestiya Akademii Nauk Armyanskoj SSR, Seriya Tekhnicheskikh Nauk; ISSN 0002-306X;
; CODEN IATNAK; v. 71(4); p. 442-449

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
1 | 2 | 3 | Next |