
	Where results make sense

Topic: Acoustic fingerprint

Related Topics

DNA fingerprinting

The Myth of Fingerprints

Fingerprints of the Gods

In the News (Sun 27 May 12)

EXECUTIVE POWER

Iran

ANALYSIS

Pakistan

Family compact

	Acoustic - Wikipedia, the free encyclopedia
		Musical acoustics, the study of the physics of music.
		Acoustic instrument, as opposed to an electric instrument.
		Acoustic Control Corporation, a company which produced instrument amplifiers using Acoustic as a brand name.
	en.wikipedia.org /wiki/Acoustic (111 words)

	SCIENTIFIC & TECHNICAL
		These acoustic analysts concluded that: the motorcycle with the open microphone was in the President’s motorcade (one of 18); that sounds as loud as gunshots are on the recording; and that these included a sound pattern that might be attributed to a gunshot originating from the Grassy Knoll [5].
		The validity of acoustic evidence for a gunshot from the ‘Grassy Knoll’ was challenged on statistical grounds and on the basis of an anomaly on the Dallas police recordings.
		The order in the data, that is, the congruence between the acoustic evidence and the sequence of events derived from a reconstruction of the crime from video evidence is the major factor that led acoustic experts to conclude that there was a gunshot from the Grassy Knoll during the assassination.
	www.geocities.com /jfkdocs/thomas.html (7355 words)

	United States Patent Application: 0040218789
		The deformation of the piezoelectric substrate that occurs from the fingerprint ridges and the piezoelectric pattern generates a distorted print signal which allows identification and access control to be performed.
		Acoustic absorbers maybe formed on the ends of the substrate to dampen surface waves and prevent reflections.
		The combined deformation that occurs from the surface wave displacement and the fingerprint ridges produces an electrical signal having a unique spectral signature which is influenced by the sensor transfer function.
	appft1.uspto.gov /netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=/netahtml/PTO/srchnum.html&r=1&f=G&l=50&s1="20040218789".PGNR.&OS=DN/20040218789&RS=DN/20040218789 (5683 words)

	[No title] (Site not responding. Last check: 2007-10-17)
		a set of reference fingerprints of which the fingerprint is likely to be a member and being based on the rarity of the feature vectors of the reference fingerprints, and determining if the fingerprint matches one of the reference fingerprints in the subset.
		Fingerprints are built off a sound stream, which may be sourced from a compressed audio file, a CD, a radio broadcast, or any of the available digital audio sources.
		Fingerprint recognition is preferably performed by a Manhattan distance calculation between a nearest neighbor set of feature vectors (or alternatively, via a multi-resolution distance calculation), from a reference database of feature vectors, and a given unknown fingerprint vector.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=02/73520.020919&ELEMENT_SET=DECL (6305 words)

	Relatable \| Tech
		TRM is an audio fingerprinting technology that generates a unique fingerprint for an audio file based on an analysis of the acoustic properties of the audio itself.
		Each audio fingerprint is unique and can be used to identify a track precisely, regardless of whether any associated text identifiers are present or accurate.
		Once the fingerprint is created, it is sent to the TRM server, which matches the fingerprint to an existing song in a customer's music database.
	www.relatable.com /tech/trm.html (370 words)

	[No title] (Site not responding. Last check: 2007-10-17)
		To predict the acoustic behaviour with frequency, it is necessary to use the impedance formula for the coil to determine the consequence of a radiation resistance, that appears at the acoustic resonance frequency.
		For acoustic generation across many frequencies, the following conditions must be satisfied: (1) sufficient current must be available in the windings of the spiral coil (2) the resulting electrical fields must be predominantly perpendicular to the plane of the disk (AT piezoelectric crystal only) (3) the acoustic loss needs to be minimal.
		The fact that an acoustic resonance had been detected was supported by the measured Q factor, which was consistent with the rest of the family of shear wave resonances observed.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=04/109272.041216&ELEMENT_SET=DECL (3503 words)

	ASA 145th Meeting Lay Language Papers -Acoustic Communication in Panthera tigris: A Study of Tiger Vocalization and ...
		Although the utterance contains a large amount of acoustic energy in the low frequency band - the intense, "yellow hot" band at the lower boundary of the spectrogram - it is notable that this communication signal contains significant acoustic energy in higher frequency bands as well.
		Examination of the associated spectrum of the roar relative to the background noise in the recording environment (see "spectral analysis") shows that the peak acoustic power of that utterance is contained in a band around 300 Hertz, similar to the frequency range that tigers appear to be most sensitive to acoustic events.
		Note that while each of the utterances considered here is distinctive, all tend to contain acoustic energy in the low frequency bands, confirming, as it were, the importance of this portion of the audible spectrum.
	www.acoustics.org /press/145th/Walsh.htm (1210 words)

	SECURIPORT (Site not responding. Last check: 2007-10-17)
		Currently, many airports have been testing iris, fingerprint and hand-reader devices to run background checks on employees and to control or restrict employees' access to secured areas.
		Acoustic Fingerprint Scan: captures the fingerprint image by acoustic means.
		Because of the bulk of fingerprint databases belonging to security authorities and other agencies, fingerprint scanning and comparison gives this technology an intrinsic advantage over all others.
	www.securiport.com /technology.asp (865 words)

	Pressemitteilungen - Nordex startet erfolgreich ins neue Geschäftsjahr
		The principle of condition monitoring systems is based on the recording of acoustic frequencies created by the rotational and friction forces of the gearwheels within the components during operation.
		This acoustic fingerprint of the gearbox, the bearing and the generator is created over a period of three months in normal operation in the wind park.
		If the actual acoustic data differ from the reference range, accurate information can be obtained on the basis of experience collected over years on the degree of wear, the expected service life of the components and their timely replacement.
	www.nordex-online.com /_e/presse_und_messen/pressemitteilungen/2003/03_01_14.html (1008 words)

	Brandenburg (Site not responding. Last check: 2007-10-17)
		This is the largest acoustic monitoring of cranes (and probably of birds) worldwide.
		4 pairs, in which one of the mates is ring banded have been recorded and taken the acoustic fingerprint of parallel to the identification of the bands.
		In one case we were able to make an acoustic sex determination: the mate of "Rosa" started another unison call - after we had recorded the first one - his mate however did not join him, which we observed; now we know, the calling partner was a male, hence "Rosa" is truely a female.
	home.nikocity.de /craneworld/Brandenburg_en.html (303 words)

	MusicBrainz Blog: Acoustic fingerprints: Is closed source OK?
		Posted by: dhess at November 30, 2005 12:04 PM While I don't have a problem with a closed-source fingerprint server, a closed-source fingerprint client is, I think, not really something that MusicBrainz can use effectively.
		Is there any way that they can split up the fingerprinting algorithm in a way that moves some of the functionality to the MB server; i.e.
		Nothing would please me more than for MB to have a good relationship with a company developing it's acoustic fingerprinting software, so long as as much of the code as possible is open source.
	blog.musicbrainz.org /archives/2005/11/acoustic_finger_1.html (3767 words)

	Martin Schleske Master Studio for Violinmaking - Munich, Germany
		This step is intended to determine the individual "acoustic fingerprint" of the reference instrument.
		The characteristics that are revealed in this process are used as an ongoing acoustic reference for comparison purposes during the creation of the new instrument.
		Another article entitled "Tonal color and the resonance profile" describes an experiment with very visual results and includes audio examples demonstrating the relevance of the resonance profile (based on the example of a violin by "Guarneri del Gesù") in terms of the perceived tonal color.
	www.schleske.de /05musiker/en_neu1phil2akukon.shtml (470 words)

	creativepro.com - MOTU Altiverb Takes Advantage of 'Velocity Engine'
		Altiverb is a sampled acoustics processor that offers one-, two- and four-channel sampled acoustics of real halls, churches, forests, bathrooms, virtually any acoustic environment.
		Sampled acoustics processing takes an enormous amount of DSP bandwidth, and there are only a few pieces of outboard gear currently on the market that can do it, stated Jim Cooper, MOTU marketing director.
		Using a process called deconvolution, the dry source signal is then extracted from the audio file, leaving behind the exact acoustic fingerprint of the space.
	www.creativepro.com /story/news/12133.html (607 words)

	Napster To Use Acoustic 'Fingerprints' - - (Site not responding. Last check: 2007-10-17)
		Napster announced that it licensed the acoustic fingerprinting technology, known as TRM for "This Recognizes Music", from Virginia-based Relatable at the end of April.
		According to Napster, an acoustic fingerprint is a small amount of data that represents the unique sound recording of a file.
		Using complex algorithms, different files can be identified as the same song by matching the acoustic fingerprint of the file being swapped with the fingerprint in an existing database.
	www.wirelessnewsfactor.com /perl/story/9559.html (695 words)

	EFF: Audible Magic - No Silver Bullet for P2P Infringement (Site not responding. Last check: 2007-10-17)
		While we at EFF support universities taking steps to educate staff and students about copyright law and to control excessive bandwidth usage, it is important that universities are not sold expensive, ineffective solutions simply to appease the public relations needs of the RIAA.
		It is also important that policymakers not be misled by the bullish pronouncements of the RIAA and Audible Magic regarding the effectiveness of "acoustic filtering" technologies.
		It examines only a small portion of the content, extracting an "acoustic fingerprint." This fingerprint is then matched against the fingerprints of copyrighted musical works in a pre-compiled database.
	www.eff.org /share/audible_magic.php (856 words)

	Artificial ear for better quality : Solutions : Institute of Applied Systems Technology : Joanneum Research (Site not responding. Last check: 2007-10-17)
		It all started with noise measurements in the interior of cars: The SOURCE recording system specially developed in cooperation with engine specialist AVL is now used by car manufacturers all over the world in order to optimise the sound of their cars.
		With highly sensitive acoustic sensors and new signal processing methods, even the tiniest deviation from this "acoustic fingerprint" can be detected, classified and used to assess the quality of the product.
		Following the successful development of material testing systems, the experts are now concentrating on integrating automatic noise classification in other potential applications such as the diagnosis of lung diseases or the improvement of tunnel safety.
	www.joanneum.ac.at /en/elektronik_sensorik/loesungen_detail.php?p_iid=IAS&p_oid=LOESUNG_126 (167 words)

	MusicBrainz: WindowsTaggerFAQ - MusicBrainz.org
		A TRM collision occurs if two different tracks have the same TRM id. Acoustic fingerprinting is not an exact science and thus we have to expect a certain number of duplicates and collisions.
		As mentioned above, acoustic fingerprinting is not an exact science and sometimes the same track encoded with two different encoders or bitrates will yield different TRM ids (in an ideal world the TRMs would be the same).
		the acoustic fingerprint (about 500 bytes) is calculated locally and then sent to the TRM signature server.
	musicbrainz.org /wd/WindowsTaggerFAQ (746 words)

	Stereophile: A Matter Of Diffusion
		The goal of room makeovers is generally to remove the room's characteristic small acoustic "fingerprint" and replace it with the space, warmth, envelopment, and liveness of a very good concert hall.
		The ideal diffusor takes broad-range acoustical energy and scatters it in a non-frequency and non-temporally related way throughout the room, regardless of the angle at which the energy initially impinges on it.
		These reflections are acoustically dissimilar, whereas in wide, low halls the first reflections will be from the ceiling, and will be acoustically similar---actually, nearly monophonic.
	www.stereophile.com /features/28/index7.html (930 words)

	Article: A Matter of Diffusion (Site not responding. Last check: 2007-10-17)
		Without wishing to deny the aforementioned trailblazers their due, it is my lot to report that a peculiar-looking device called a "quadratic residue diffusor" leaves little doubt that what largely separates the listening room from the concert hall is the acoustic "fingerprint" of the listening room itself.
		This is not an easy task, for physical structures generally operate, acoustically, only on narrow slices of the frequency band and within a restricted range of incidence angles, making them effective only for a small percentage of the total sound energy impinging on them.
		The specificity of acoustic images the speakers suspended in the room (always a forte with Quads) was complemented by a wider, deeper soundstage, a decidedly less dry-sounding acoustic, and an addicting sensation of being in the middle of the action.
	www.keithyates.com /matterofdiffusion.htm (5945 words)

	Napster software will identify sounds not names... - CD Freaks.com (Site not responding. Last check: 2007-10-17)
		Yesterday we already reported about the new beta 10 of napster including the acoustic fingerprint system.
		A: An acoustic fingerprint is a small amount of data that represents the unique sound recording of a file.
		A: We are collecting acoustic fingerprints to help us build a system that more accurately identifies the music files that our users are sharing.
	www.cdfreaks.com /news/1834 (627 words)

	Mike Linksvayer » MusicBrainz Discovery (II)
		Acoustic fingerprinting is fragile in three ways — it is subject to false positives and false negatives, there is no open source implementation of the concept, and the technology MusicBrainz uses, Relatable TRM, is proprietary and requires a centralized server.
		Indeed, many of the technology questions at Tuesday’s music metadata panel concerned acoustic fingerprints.
		It is important to understand that while MusicBrainz uses acoustic fingerprints, it does not rely on them.
	gondwanaland.com /mlog/2004/10/15/musicbrainz-discovery-ii (658 words)

	Relatable
		Relatable’s TRM identifies music based purely on acoustical features in the recording itself, and does not rely on inserting watermarks, text or other inserted identifiers.
		TRM acoustic fingerprint technology has been integrated into the Neuros system, which synchronizes to a consumer’s PC for identification and management of music on the device and allows recording from an integrated FM tuner and through a microphone.
		TRM identifies audio content based on acoustical features and is accurate across the widest range of audio sources, from analog sources such as radio broadcast or over a microphone to digitally encoded music files.
	www.relatable.com /news/pressreleases/030109.release2.html (600 words)

	Q&A on Acoustic Fingerprinting Technology (Napster) - Pressi.com (Site not responding. Last check: 2007-10-17)
		Using complex matching algorithms and acoustic fingerprints, different versions of a single recording can be identified as the same recording.
		A: Every once in a while, the Napster server will request that a Napster application generate a fingerprint of a file you are sharing and send it to the server.
		A: With Beta 10, we are introducing fingerprinting technology into Napster so that we may begin collecting fingerprints to form the foundation for a database that we will soon begin to use to identify files and more accurately block those files that rights holders have asked us to exclude from the Napster Community.
	www.pressi.com /us/release/30500.html (497 words)

	Play it again RAM (Site not responding. Last check: 2007-10-17)
		Working at the Massachusetts Institute of Technology, Brown and her colleagues at the Paris-based Institute for Musical and Acoustic analysed the timbre-- or sound quality—of the clarinet, flute, oboe, and saxophone.
		This resonance, which is a function of the instrument's construction, amplities certain frequencies giving the instrument an "acoustic fingerprint".
		They then used statistical pattern-recognition software to compare the acoustic fingerprints from these samples with other recordings of solo woodwind instruments.
	www.wellesley.edu /Physics/brown/pubs/nsarticle.htm (411 words)

	Loudspeaker Imaging Theorem (Site not responding. Last check: 2007-10-17)
		All localization cues, phase and path length relationships, and the "fingerprint" of the original acoustic space (as long as the recording is not mixed in such a way as to destroy this information) exist on the recording in progressive fractal levels and can be retrieved if these veils are stripped away.
		Dipole cancellation occurs at 90 degrees from the front and rear axis and as a result there is almost no acoustic energy at the baffle edges to diffract, hence diffraction is almost entirely eliminated in a dipole speaker.
		But when you work with multi-way speaker the physical offsets, resulting path lengths, the acoustic roll-offs of the drivers, their different phase responses, and the crossover used all alter this combined system phase response making it no longer minimum phase.
	diyaudiocorner.tripod.com /imaging.htm (3810 words)

	creativepro.com - Audio Ease Altiverb Plug-in for MAS Uses Power Macintosh Velocity Engine
		Altiverb is a sampled acoustics processor that offers realistic one-, two- and four-channel sampled acoustics of real halls, churches, forests, bathrooms - and virtually any acoustic environment.
		The result is a native reverb plug-in for Digital Performer that exceeds the performance of recently introduced outboard sampled acoustics processors that cost as much as $10,000.
		The result is a true reproduction of the sound of the acoustic space.
	www.creativepro.com /printerfriendly/story/12132.html (596 words)

	New Scientist Breaking News - Tigers use infrasound to warn off rivals (Site not responding. Last check: 2007-10-17)
		When the researchers analysed the frequency spectrum of the roar of a Siberian tiger, they found that the peak power was around 300 hertz and that it included components that stretched down into the infrasound range, below 20 hertz.
		The long-term aim of the project is to discover whether the sounds made by individual tigers are distinctive enough to act as an "acoustic fingerprint".
		The new research was presented at the Acoustical Society of America's annual conference in Nashville, Tennessee.
	www.newscientist.com /article.ns?id=dn3680 (517 words)

Try your search on: Qwika (all wikis)