| 1. |
- Krantz, Göran, et al.
(författare)
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Melodic intervalls as reflected in body movement
- 2006
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Ingår i: 9th International Conference on Music Perception and Cognition. - 8873951554 ; , s. 265-268
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 2. |
- Krantz, Göran, et al.
(författare)
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Melodic intervals and body movement
- 2003
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Ingår i: Dance and Education. Proceedings of the 17th International Congress on Dance Research. - Athens, Greece : IOAFA. ; , s. 141-148
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Konferensbidrag (refereegranskat)
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| 3. |
- Lindestad, Per Å, et al.
(författare)
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Voice source characteristics in mongolian throat singing studied with high-speed imaging technique, acoustic spectra, and inverse filtering
- 2001
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Ingår i: Journal of Voice. - 0892-1997 .- 1873-4588. ; 15:1, s. 78-85
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Tidskriftsartikel (refereegranskat)abstract
- Mongolian “throat singing” can be performed in different modes. In Mongolia, the bass-type is called Kargyraa. The voice source in bass-type throat singing was studied in one male singer. The subject alternated between modal voice and the throat singing mode. Vocal fold vibrations were observed with high-speed photography, using a computerized recording system. The spectral characteristics of the sound signal were analyzed. Kymographic image data were compared to the sound signal and flow inverse filtering data from the same singer were obtained on a separate occasion. It was found that the vocal folds vibrated at the same frequency throughout both modes of singing. During throat singing the ventricular folds vibrated with complete but short closures at half the frequency of the true vocal folds, covering every second vocal fold closure. Kymographic data confirmed the findings. The spectrum contained added subharmonics compared to modal voice. In the inverse filtered signal the amplitude of every second airflow pulse was considerably lowered. The ventricular folds appeared to modulate the sound by reducing the glottal flow of every other vocal fold vibratory cycle.
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| 4. |
- Loáisiga Caballero, Carlos Henry, et al.
(författare)
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Genetic diversity in seven populations of Nicaraguan teosinte (Zea nicaraguensis Iltis et Benz) as estimated by microsatellite variation
- 2011
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Ingår i: Genetic Resources and Crop Evolution. - : Springer Science and Business Media LLC. - 0925-9864 .- 1573-5109. ; 58, s. 1021-1028
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Tidskriftsartikel (refereegranskat)abstract
- Teosintes are the closest relatives to modern maize, Zea mays L. ssp. mays. They are wild grasses with a native distribution area from Mexico to Nicaragua and represent an important genetic resource. However, the genetic diversity of Nicaraguan teosinte (Zea nicaraguensis Iltis et Benz) has not yet been determined. This teosinte species has decreased in the last 25 years and now must be regarded as an endangered species. An analysis of the genetic diversity of Zea nicaraguensis was carried out in a total of 240 individuals from seven populations. Eleven Simple Sequences Repeat (SSR) primer pairs were used. A total of 42 alleles were found, the range of alleles per locus was 2-5 (mean 3.8) and the numbers of genotypes varied between primers. The primer Bnlg 1538 showed the highest value, with 45 genotypes through all populations. The genetic diversity observed (Ho) between all populations varied from 0.51 to 0.63, with an average of 0.563. One of the populations had as many as 40 alleles. Analysis of molecular variance (AMOVA) revealed that most of the variation was within population, at a significantly high level (P < 0.001). Rare alleles were detected in all populations, but unique alleles were only found in four populations. These results are highly relevant when developing conservation strategies and show that preserving populations in their natural habits is highly important.
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| 5. |
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| 6. |
- Madison, Guy, 1961-, et al.
(författare)
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Consistency in listeners’ ratings as a function of listening time
- 2003
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Ingår i: Proceedings of the Stockholm music acoustics conference. - Stockholm : Royal College of Technology. ; , s. 639-642
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Konferensbidrag (refereegranskat)abstract
- We examined the consistency and similarity of adjective ratings of 10 music examples (ME) across 7 different example durations. Although the effect of ME was generally statistically significant for all 14 adjectives and all durations from 0.5 to 16s, the agreement between the relative ratings of MEs was poor for some adjectives. Consistency, in terms of F ratios, did not increase with duration, which seems to contradict the hypothesis that more information entails better judgements. We discuss possible explanations for these results, and conclude that further examination of the validity of adjective ratings is warranted.
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| 7. |
- Madison, Guy, et al.
(författare)
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Human sensorimotor tracking of continuous subliminal deviations from isochrony
- 2004
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Ingår i: Neuroscience Letters. - : Elsevier BV. - 0304-3940. ; 370, s. 69-73
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Tidskriftsartikel (populärvet., debatt m.m.)abstract
- We show that people continuously react to time perturbations in the range 3-96 ms in otherwise isochronous sound sequences. Musically trained and untrained participants were asked to synchronise with a sequence of sounds, and these two groups performed almost equally below the threshold for conscious detection of the deviations. Above this threshold the motor reactions accounted for a larger proportion of the stimulus deviations for musically trained participants.
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| 8. |
- Madison, Guy, et al.
(författare)
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Metrically structured time and entrainment
- 2017
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Ingår i: The Routledge companion to embodied music interaction. - London : Routledge. - 9781138657403 - 9781315621364 ; , s. 22-30
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Bokkapitel (refereegranskat)abstract
- This chapter focuses on the perceptual mechanisms that enable and facilitate entrainment to the temporally regular sounds of music. It discusses possible unifying principles underlying functions of entrainment in the action range for human movement, where entrainment occurs most readily and with greatest precision. The chapter reviews timing constraints imposed by our biology and describes the metrical organization of time that is employed by music as well as our perceptual system. It argues that one main function of metrical structure is to circumvent temporal constraints inherent in the neural system. The chapter considers the function of metrical structure from the point of view of its efficacy at inducing the volitional underpinnings of entrainment, or groove. Although empirical studies do not support an association between groove and microtiming, the notion that temporal patterning might in fact facilitate entrainment is consistent with our functional perspective.
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| 9. |
- Madison, Guy, 1961-, et al.
(författare)
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On the limits of anisochrony in pulse attribution
- 2002
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Ingår i: Psychological Research. - : Springer Science and Business Media LLC. - 0340-0727 .- 1430-2772. ; 66:3, s. 201-207
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Tidskriftsartikel (refereegranskat)abstract
- Pulse is the subjective experience of isochrony, which is typically elicited by series of sensory events with close to isochronous spacing, as is common in music and poetry. We measured the amount of anisochrony in a 10-event sequence with 570-630 ms nominal inter onset intervals (IOI) that corresponded to the threshold for pulse attribution. This threshold was 8.6% of the IOI across 28 participants with a wide range of musical training, as compared with 3.5% for detection of anisochrony in the same kind of sequence. Musical training led to lower thresholds for detection of irregularity but had no effect on pulse attribution. The relatively larger amount of anisochrony in pulse attribution may reflect the limit for predicting and synchronising with future events. We suggest that this limit reflects a compromise between tolerance for naturally occurring deviations and the need for precision in timing.
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| 10. |
- Madison, Guy, 1961-, et al.
(författare)
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Timing of action during and after synchronization with linearly changing intervals
- 2005
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Ingår i: Music perception. - : University of California Press. - 0730-7829 .- 1533-8312. ; 22:3, s. 441-459
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Tidskriftsartikel (refereegranskat)abstract
- Musicians and nonmusicians synchronized to sound sequences in which each of 90 successive intervals increased or decreased by the same amount of time. After this they continued to produce 30 beats without interruption. Synchronization appeared both efficient and effortless for all levels of tempo change, as indicated by equal dispersion among the asynchronies. For up to 1 ms change per interval asynchronies between sounds and responses during synchronization were negative for increasing intervals and positive for decreasing intervals. We discuss the bearing of these results on listeners' ability to create and sustain an internal non-isochronous periodic process.
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