
	Where results make sense

Topic: Auditory illusion

Related Topics

Optical illusion

Octave illusion

Illusory continuity of tones

Glissando illusion

Shepard tone

Psychoacoustics

High frequency limit

Subband encoding

Absolute threshold of hearing

Pitch (music)

Bark scale

Chromatically microtonal

Penrose triangle

Audio compression

Doppler effect

	CAE - Forensic Audio and Auditory Illusions
		Such illusions are triggered by certain combinations of the auditory stimuli of frequencies and rhythmic patterns, with perhaps varying pitch.
		Auditory illusions are created by a combining of frequencies and rhythms from device system noise, environmental sonic events, device playback noise, recording tape anomalies and our brain imposing an order on the sonic events presented for interpretation.
		Another factor which may create an auditory illusion is environmental resonance within the playback environment, including a resonating plastic case of a playback device such as a small standard cassette recorder, speaker enclosure resonance and wall reflections.
	www.caeaudio.com /illusion.html (1415 words)

	Acoustical Society of America - Circularity in Pitch Judgement
		One of the most widely used auditory illusions is Shepard's (1964) demonstration of pitch circularity, which has come to be known as the "Shepard Scale" demonstration.
		The result is an "ever-ascending" scale, which is a sort of auditory analog to the ever-ascending staircase visual illusion.
		I. Pollack (1977), "Continuation of auditory frequency gradients across temporal breaks," Perception and Psycophys.
	asa.aip.org /demo27.html (234 words)

	C:\Program Files\Recognita Plus 5.0\deutch.htm
		A basic task for auditory theory is to determine the relationships between elements of an ongoing sound spectrum that give rise to the perception of a single sound and those that give rise to the perception of several simultaneous sounds.
		Our auditory environment is very complex, and the assignment of sounds to their sources is rendered difficult by the presence of echoes and reverberation.
		An analogous illusion was obtained under these conditions: The subjects perceived a high tone that appeared to be coming from one speaker, which alternated with a low tone that appeared to be coming from the other speaker.
	www.zainea.com /deutch.htm (10982 words)

	The Auditory Continuity Illusion/Temporal Induction: Expanding the Discussion (Christopher Petkov )
		My impression is that the neurophysiological bases behind many processes of auditory scene analysis are not that well known, or are at least beginning to be understood.
		The discussion so far has centered specifically on auditory continuity, but streaming and continuity are just two models or descriptions of natural abilities of a working (dare we say 'normal'?) auditory system.
		Mitch Sutter has strong evidence that the > illusion is operative in macaques, and he has some accompanying > electrophysiology (that has not been published yet to the best of my > knowledge) showing correlates of induction in primary auditory cortex.
	www.auditory.org /postings/2005/937.html (1084 words)

	Stephen McAdams, Emmanuel Bigand: Introduction to Auditory Cognition (Thinking in Sound: The Cognitive Psychology of ...
		Auditory perception reveals a paradox similar to that encountered in all realms of perception: nothing seems more simple than to perceive the sound environment around us, and yet it is a phenomenon that appears to rebel against scientific analysis.
		Auditory illusions are another situation that emphasizes the interpretive work performed by the perceptual system: nevertheless, in this case, the inference realized on the basis of the available information is incorrect and results in the perception of an unreal sound object.
		According to the theory of auditory scene analysis, auditory grouping generally precedes the extraction or computation of perceptual properties or attributes; that is, attributes are the derived perceptual properties of the elements that have been grouped together.
	mediatheque.ircam.fr /articles/textes/McAdams93b/index-e.html (3567 words)

	Criminal Psychology - Part II (Site not responding. Last check: 2007-11-02)
		The study of auditory illusions is rendered especially difficult by the rarity of their repetition, which makes it impossible reliably to exclude accidents and mistakes in observation.
		Illusions of taste are of importance for us only in cases of poisoning in which we want the assistance of the victim, or desire to taste the poison in question in order to determine its nature.
		Such illusions are to be explained by the fact that many odors are in the air, that they are not very powerfully differentiated and may hence be turned by means of the imagination into that one which is likely to be most obvious.
	www.worldwideschool.org /library/books/phil/psychology/CriminalPsychology/chap39.html (5889 words)

	NationMaster - Encyclopedia: Auditory illusion
		An auditory illusion is an illusion of hearing (sense), the sound equivalent of an optical illusion: the listener hears either sounds which are not present in the stimulus, or "impossible" sounds.
		Auditory illusions are created by a combining of frequencies and rhythms from device system noise, environmental sonic events, device playback noise, recording tape anomalies and our brain imposing an order on the sonic events presented for interpretation.
		Paradox illusions offer objects that are paradoxical or impossible, such as the Penrose triangle or impossible staircases seen, for example, in the work of M. Fiction illusions are the perception of objects that are genuinely not there to all but a single observer, such as those induced by schizophrenia or hallucinogenic drugs.
	www.nationmaster.com /encyclopedia/Auditory-illusion (354 words)

	Highbeam Encyclopedia - Search Results for illusion
		A visual illusion that causes the moon to appear relatively larger when it is near the horizon than when it is at its zenith, although in both cases it subtends the same visual angle of about one-half of a degree or 30 minutes of arc, and although it does not necessarily appear any...
		A powerful cognitive illusion that causes approximately 98 per cent of people to judge an object to be heavier than another object of the same weight but much larger size when the two are lifted by hand.
		An illusion in the cognitive domain, one of the best known examples being the size-weight illusion, although it is also a tactile illusion.
	www.encyclopedia.com /SearchResults.aspx?Q=illusion&StartAt=1 (773 words)

	Auditory illusion - Encyclopedia, History, Geography and Biography
		An auditory illusion is an illusion of hearing, the sound equivalent of an optical illusion: the listener hears either sounds which are not present in the stimulus, or "impossible" sounds.
		Demonstrations of various auditory illusions at Kyushu Institute of Design
		Auditory illusion, See also, External links and Auditory illusions.
	www.arikah.com /encyclopedia/Auditory_illusion (165 words)

	Auditory (Site not responding. Last check: 2007-11-02)
		Hearing, is the auditory sense, the sense by which sound is perceived.
		Auditory illusion, sound trick analogous to an optical illusion.
		Primary auditory cortex, the part of the higher-level of the brain that serves hearing.
	www.buzznet.com /tags/auditory (102 words)

	Illusion - Psychology Wiki (Site not responding. Last check: 2007-11-02)
		An illusion is a distortion of a sensory perception.
		Unlike an hallucination, which is a sensory experience in the absence of a stimulus, an illusion describes a distortion of a perception so it is understood and interpreted differently.
		These "illusionations" are not hallucinations in the strict sense of the word since they are not novel fabrications of the mind but rather a distortion of what is seen and heard.
	psychology.wikia.com /wiki/Illusion (419 words)

	glossary.htm (Site not responding. Last check: 2007-11-02)
		Apparent-distance theory Theory of the moon illusion in which the moon seems to be farther from the viewer when it is on the horizon than when it is at the zenith.
		Induced movement Illusion of movement that occurs when a visual frame of reference moves in one direction and produces the illusion that a stationary target is moving in the opposite direction.
		Ponzo illusion Illusion in which two parallel lines the same length appear to be different lengths because of the presence of depth cues.
	www.skidmore.edu /~hfoley/glossary.htm (11551 words)

	JSMF - Bridging Brain, Mind, and Behavior: 2003 Research Awards
		Studying illusions such as fill-in is scientifically valuable because of the incongruity between the physical stimulus and the percept.
		We propose to identify the neuronal contribution to perception, specifically to auditory fill-in, by investigating perception and single unit responses from auditory cortex.
		By using an auditory illusion we can identify what parts of the brain are involved in creating percepts that deviate significantly from the world, and therefore how the brain creates unique perceptions.
	www.jsmf.org /grants/bmb/essays/2003/sutter.htm (990 words)

	Octave Illusion
		The use of the octave in this illusion is due to the fact the higher note of the octave has twice the frequency of the lower note in the octave.
		There was a difference in the perception of the illusion by people who were right-handed, compared to people who were left-handed Right-handers tend to hear the pattern as the high tone on the right side and the low tone on the left side, regardless of the position of the headphones.
		The Octave Illusion will be played for the participant two or three times, they will then communicate to whoever is running the experiment and they will record how the participant perceives the notes being played into their ear.
	www.alma.edu /departments/psychology/sp2006/octave/octave.htm (2208 words)

	auditory \| \| Dictionary & Translation by Babylon
		Auditory means of or relating to the process of hearing:Auditory system, the neurological structures and pathways of sound perception.
		Hearing (sense), is the auditory sense, the sense by which sound is perceived.
		Primary auditory cortex, the part of the higher-level of the brain that serves hearing.External auditory meatus, the ear canalAuditory phonetics, the science of the sounds of languageAuditory imagery, hearing in head in the absense of sound
	www.babylon.com /definition/auditory/All (147 words)

	Visual and Auditory Illusions
		Illusions, by definition, are phenomena that we perceive in a way that differs from their actual nature.
		If we can recreate such an illusion on a computer, then we know that the computer display itself is capable of operating at the limits of our perceptual abilities, at least in the respects relevant to the particular illusion.
		Although illusions should not generally be considered a precise diagnostic tool, they can nevertheless be helpful in a coarse evaluation of a display environment.
	www.cs.ubc.ca /nest/imager/contributions/flinn/Illusions/Illusions.html (1017 words)

	Human Perception: Illusions and hallucinations: TYPES OF ILLUSORY EXPERIENCE: Stimulus-distortion illusions.: Auditory ...
		A common phenomenon is the auditory impression that a blowing automobile horn changes its pitch as it passes an observer on a highway.
		Another auditory illusion was described in 1928 by P.T. Young, an American psychologist, who tested the process of sound localization (the direction from which sound seems to come).
		When such auditory beats occur too rapidly to be discriminated, the resulting experience may be that of a harsh, continuous noise.
	karws.gso.uri.edu /Marsh/Jfk-conspiracy/Perception.html (334 words)

	MuSICA Research Notes: V I, I 1, Spring 1994
		The auditory receptors in the inner ear (cochlea) break down musical and other complex sounds into their component frequencies which are then forwarded separately into the auditory system.
		It seems when the auditory system is given a harmonic series, the brain computes the frequency that would give rise to this series and then produces the "correct" perception.
		Should the auditory cortex be malfunctioning, as in the case of a stroke, then animals no longer perceive pitch but can only react to individual pure tone frequencies (2).This type of animal research has important implications for understanding how neurological problems in humans affect their perceptions.
	www.musica.uci.edu /mrn/V1I1S94.html (3798 words)

	Dent Projects
		Mislocalization errors: A less well-studied auditory phenomenon that is related to the precedence effect is known as the Franssen Effect.
		Other auditory illusions: Although a great deal of information is known about visual illusions in both humans and other animals, much less is known about auditory illusions (with the exception of the precedence effect).
		We are looking into other auditory illusions such as the perceptual ‘filling-in’ of auditory stimuli disrupted by noise, the perception of auditory movement, and auditory stream segregation.
	www.acsu.buffalo.edu /~mdent/projects.htm (583 words)

	Pion abstract (Site not responding. Last check: 2007-11-02)
		Two tapes of triplets of words spoken at 5 s intervals separated by a longer gap were played synchronously through the same speaker, such that the words on the two tapes coincided exactly.
		The speaker was displaced from a television monitor showing the lip movements of one of the streams.
		Driver found that the auditory stream corresponding to the lip movements appeared to be mislocated on the lips (the ventriloquist effect) and the non-corresponding stream appeared to be located at its visible speaker.
	www.perceptionweb.com /perception/ecvp01/0114.html (204 words)

	McGurk Description (Site not responding. Last check: 2007-11-02)
		To produce the effect, the talker was recorded saying the syllable "ma", and videotaped while saying the word "ka." The spoken utterance was carefully aligned with the video, resulting in the clip you just saw.
		Not everyone experiences the McGurk illusion, though the "ma" + "ka" = "na" form is one of the strongest combinations to produce the effect.
		Another form that will produce the illusion, at least for some people, is "ba" (auditory) + "ga" (visual) = "da." Again, "ba" is produced with closed lips, while "da" and "ga" are produced with open lips.
	epsych.msstate.edu /descriptive/Hearing/mcgurk/mcgurk_desc.html (549 words)

	Visual Illusions
		After one octave has been played the notes are the same pitch as they were at the start of the octave.
		The illusion is an auditory equivalent of the apparently ever rising lines on a rotating barber's pole or
		The illusion is created because each sound is really composed of many pitch frequencies that are crafted to create this illusion.
	www.gla.ac.uk /philosophy/CSPE/illusions/illusions.html (444 words)

	Auditory illusion
		An auditory illusion is an illusion of hearing (sense), the
		sound equivalent of an optical illusion: the listener hears either sounds which are not present in the stimulus, or "impossible" sounds.
		In short, audio illusions highlight areas where the human ear and brain, as organic, makeshift tools, differ from perfect audio receptors (for better or for worse).
	www.mp3.fm /Auditory_illusion.htm (115 words)

	Tom Yin, Department of Physiology, UW-Madison
		The ability to localize the source of a sound is an important function of the auditory system.
		To study the anatomical and physiological circuits that are important, we record from single cells in various auditory nuclei in the brainstem of anesthetized animals while delivering simple or complex acoustic stimuli that contain various localization cues.
		We have studied the interaction of visual and auditory stimuli in the superior colliculus as well as responses of cells in the inferior colliculus to stimuli that mimic the precedence effect, a well-known psychophysical illusion that allows us to localize sounds in a reverberant acoustic environment.
	www.physiology.wisc.edu /faculty/yin.html (571 words)

	A paradox of musical pitch
		University of California, San Diego, psychologist Diana Deutsch, PhD, and her colleagues have created an auditory illusion called the tritone paradox, and have found that a person's linguistic history has a lot to do with how the illusion is heard.
		Deutsch's auditory illusion is rooted in the concept of pitch, which can be thought of in two dimensions--height and class.
		Twenty years later, Deutsch added another dimension to Shepard's illusion by giving participants pairs of ambiguous tones, one played after the other, that were related by a tritone (for example, C followed by F#).
	www.apa.org /monitor/julaug01/musicpitch.html (1443 words)

	Publications- John G. Neuhoff
		An adaptive bias in the perception of looming auditory motion.
		Neuhoff, J. Bias for auditory looming is diminished with increasing velocity.
		Neuhoff, J. Ghazanfar, A. A., and Logothetis N. Auditory looming perception in rhesus monkeys.
	jneuhoff.com /page2.htm (1490 words)

	Optical Illusions Etc: free, scary, word & picture optical illusions
		Whether these optical illusions are conveyed through fractals, photographs, architecture, art, or old fashioned pen and ink, they are bound to remind you that "seeing is not believing."
		Some of the optical illusions on this blog may cause dizziness or possibly epileptic seizures.
		The animation develops through illusions caused by concurrent different perspectives of simple lines and surfaces.
	illusionsetc.blogspot.com (917 words)

	Turntable Illusions: Links to Optical Illusions Sites
		Auditory Illusion — A great auditory illusion from CBC Radio's Quirks and Quarks program.
		An illusion brought to you by the Exploratorium.
		Visual Illusions Gallery — This site features lots of wonderful illusions, from the old woman/young woman ambiguous drawing to Escher cubes, to impossible stairways, to the face/vase illusion, color blends, and more.
	www.celebratetoday.com /illo2.html (294 words)

Try your search on: Qwika (all wikis)