![]() ![]() Sharp low-and high-frequency limits on musical chord recognition. Restorative Neurology and Neuroscience, 25(3–4), 399–410.īiasutti, M. Influence of musical expertise and musical training on pitch processing in music and language. The American journal of psychology, 147–166.īesson, M., Schön, D., Moreno, S., Santos, A., & Magne, C. Pitch as a medium: a new approach to psychophysical scaling. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.Īttneave, F., & Olson, R. Furthermore, these results support the model proposed by Deutsch where pitch perception is one of the central frameworks of illusion perception. These results support past studies who investigated pitch perception. Results from this study revealed that the illusion perception differs significantly at the low and high limits of the musical spectrum where reduced accuracy of pitch perception is known to occur. When using pairs of stimuli towards the upper and lower boundaries of the selected range: (1) distributions of percepts significantly differ from the classic 400-800 Hz, (2) the octave percept was reported less frequently, particularly at very low frequencies. Participants were presented with 7 pairs of frequencies from 40-80 Hz to 2000-4000 Hz and had to select a choice (octave, simple, complex) corresponding to their perception. The present study aimed to investigate how the relative frequency distribution of percepts changes across a greater proportion of the musical scale to better understand the influence of pitch on illusion perception. ![]() However, these studies did not cover part of that spectrum where musical pitch perception decreases (below 200 and above 1600 Hz). Previous studies used central frequencies of the useful musical spectrum to elicit the illusion. This illusion engages an important mechanism of auditory perception, which is pitch perception. ![]() After around five or six repetitions, the brain begins to interpret it in a musical way – something that audiologists still can’t really explain.The octave illusion (Deutsch, 1974) is a well-known auditory illusion elicited by presenting a dichotic sequence of two tones separated by an octave during which the high and low tones alternate between both ears. Apparently, it needs to be a phrase that has been taken from a longer sentence, and then immediately repeated. In this case, the brain seems to turn ordinary speech into a form of song if a phrase is repeated often enough. Another fascinating illusion is the “Speech to Song” effect. What results shouldn’t make sense, but in experiments, people have heard “phantom” words emerging as their brains struggle to understand what they are hearing. Deutsch rigged up a pair of stereo speakers and played a two-word phrase through them, with one offset so that the first word is overlaid constantly by the second. For example, Diana Deutsch also looked into what is known as “pareidolia” – the perception of words or images which make sense from a chaotic, disorganized backdrop. There are plenty of other remarkable auditory illusions beside the Tritone Paradox, the McGurk Effect and the Shepard Tone, and more are being discovered all the time. However, according to Deutsch, the language you speak and the culture you grew up in plays a major role.īelow you can see an example of the Tritone Paradox: Why is this? It’s still not exactly clear. But here’s the interesting part: when you listen to them as a group, you’ll probably come up with different interpretations of which note was high, and which was low. According to British musicologist Diana Deutsch, these two tones can either be heard as ascending or descending notes. As you might have guessed, they are a pair of Shepard Tones, and have the same magical properties as their ascending compatriots. But with the Triton Paradox, you’ll hear a pair of notes played directly after each other, with a small gap in between called a “tritone.”īut these aren’t ordinary notes. In the normal Shepard Tone, a scale ascends seemingly forever. The Tritone Paradox is one of the most well-known variants of the Shepard Illusion, and it’s an auditory illusion that works best when you try it out on friends. The Tritone Paradox: Everyone hears something a little bit different ![]()
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