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- Pabon, Peter, et al.
(författare)
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Effects on Vocal Range and Voice Quality of Singing Voice Training : The Classically Trained Female Voice
- 2014
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Ingår i: Journal of Voice. - : Elsevier. - 0892-1997 .- 1873-4588. ; 28:1, s. 36-51
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Tidskriftsartikel (refereegranskat)abstract
- ObjectivesA longitudinal study was performed on the acoustical effects of singing voice training under a given study programme, using the Voice Range Profile (VRP). Study DesignPre- and post-training recordings were made of students that participated in a 3-year bachelor singing study programme. A questionnaire that included questions on optimal range, register use, classification, vocal health and hygiene, mixing technique, and training goals, was used to rate and categorize self-assessed voice changes. Based on the responses, a sub-group of 10 classically trained female voices was selected, that was homogeneous enough for effects of training to be identified. MethodsThe VRP perimeter contour was analyzed for effects of voice training. Also, a mapping within the VRP of voice quality, as expressed by the crest factor, was used to indicate the register boundaries and to monitor the acoustical consequences of the newly learned vocal technique of ‘mixed voice.’ VRP’s were averaged across subjects. Findings were compared to the self-assessed vocal changes. ResultsPre-post comparison of the average VRPs showed, in the midrange, (1) a decrease in the VRP area that was associated with the loud chest voice, (2) a reduction of the crest factor values, and (3) a reduction of maximum SPL values. The students’ self-evaluations of the voice changes appeared in some cases to contradict the VRP findings. ConclusionsVRP’s of individual voices were seen to change over the course of a singing education. These changes were manifest also in the group average. High resolution computerized recording, complemented with an acoustic register marker, allows a meaningful assessment of some effects of training, on an individual basis as well as for groups comprised of singers of a specific genre. It is argued that this kind of investigation is possible only within a focussed training programme, given by a faculty that has agreed on the goals.
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- Schalling, E., et al.
(författare)
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Effects of tactile biofeedback by a portable voice accumulator on voice intensity in speakers with Parkinson’s disease
- 2013
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Ingår i: Journal of Voice. - : Elsevier BV. - 0892-1997 .- 1873-4588. ; 27:6, s. 729-737
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Tidskriftsartikel (refereegranskat)abstract
- Objectives: To study the effects of biofeedback on voice sound level (SL) in subjects with reduced voice SL, secondary to Parkinson disease (PD), using a portable voice accumulator. Study Design: Prospective intervention study. Methods: Voice SL, phonation time, and level of background noise were registered with a portable voice accumulator during three consecutive registration periods. Six subjects with reduced voice SL secondary to PD participated. Biofeedback, in the form of a vibration signal when voice SL went below an individually set threshold level, was administered during the second registration period only. Mean voice SL was calculated for registration periods with and without feedback. Data on phonation time and level of background noise was also collected. Field registrations with the portable voice accumulator were also compared with registrations made in a recording studio. In addition, subjects were asked about subjective experiences of using the portable voice accumulator for up to 15 days. Results: There was a statistically significant increase in voice SL during the period when biofeedback of voice SL was administered. Subjects reported that using the portable voice accumulator was a positive experience. Several participants wished to continue using the device. In general, subjects handled the device independently with no major problems and did not report any negative experiences. Conclusions: Although this study was a first trial including six subjects with reduced voice SL secondary to PD, the findings indicate that biofeedback of voice SL administered via a portable voice accumulator may be a useful treatment tool for this group of patients and that further studies are needed.
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- Sjölinder, Marie, et al.
(författare)
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User involvement of patients with eating disorder – the design process from user needs to prototype
- 2010
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Ingår i: ICEHST 2010 - International Conference on e-Health Services and Technologies. - University of Piraeus, Athens, Greece.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The aim of this work was to investigate different methods for involving patients with eating disorders in the design process. According to the specific needs of this group of patients four main design goals were set up for the system. These were: Providing an artificial case manager able of answering questions and of interacting with the patient; Enhancing motivation to get well; Providing distraction from the disease; Providing an appealing environment that the patients find interesting enough to use for a longer period of time. To meet these requirements several methods for involving end-users were used including “Cultural Probes”, “Repertory Grid Technique” and ”Wizard of Oz”. This paper describes our experiences of using these methods when developing a system for patients with eating disorders. The methods and the tasks used in the different studies also turned out to be a distraction away from the disease, which shows the potential of making the development process a part of the actual usage. The patients’ enthusiasm regarding the tasks in the studies also showed the importance of using methods suitable with respect to the symptoms of the disease and tasks that the specific group of patients find interesting and meaningful.
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