| 1. |
- Bresin, Roberto, et al.
(author)
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Sound and Music Computing at KTH
- 2012
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In: Trita-TMH. - Stockholm : KTH Royal Institute of Technology. - 1104-5787. ; 52:1, s. 33-35
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Journal article (other academic/artistic)abstract
- The SMC Sound and Music Computing group at KTH (formerly the Music Acoustics group) is part of the Department of Speech Music and Hearing, School of Computer Science and Communication. In this short report we present the current status of the group mainly focusing on its research.
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| 2. |
- Bresin, Roberto, et al.
(author)
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Sound and Music Computing at KTH
- 2012
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In: SMC Sweden 2012 Sound and Music Computing, Understanding and Practicing in Sweden. - Stockholm : Department of Speech, Music and Hearing, Royal Institute of Technology. ; , s. 33-35
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Conference paper (peer-reviewed)
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| 3. |
- Enflo, Laura, 1980-
(author)
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Alternative Measures of Phonation: Collision Threshold Pressure and Electroglottographic Spectral Tilt : Extra: Perception of Swedish Accents
- 2010
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Licentiate thesis (other academic/artistic)abstract
- The collision threshold pressure (CTP), i.e. the smallest amount of subglottal pressure needed for vocal fold collision, has been explored as a possible complement or alternative to the now commonly used phonation threshold pressure (PTP), i.e. the smallest amount of subglottal pressure needed to initiate and sustain vocal fold oscillation. In addition, the effects of vocal warm-up (Paper 1) and vocal loading (Paper 2) on the CTP and the PTP have been investigated. Results confirm previous findings that PTP increases with an increase in fundamental frequency (F0) of phonation and this is true also for CTP, which on average is about 4 cm H2O higher than the PTP. Statistically significant increases of the CTP and PTP after vocal loading were confirmed and after the vocal warm-up, the threshold pressures were generally lowered although these results were significant only for the females. The vocal loading effect was minor for the two singer subjects who participated in the experiment of Paper 2. In Paper 3, the now commonly used audio spectral tilt (AST) is measured on the vowels of a large database (5277 sentences) containing speech of one male Swedish actor. Moreover, the new measure electroglottographic spectral tilt (EST) is calculated from the derivatives of the electroglottographic signals (DEGG) of the same database. Both AST and EST were checked for vowel dependency and the results show that while AST is vowel dependent, EST is not. Paper 4 reports the findings from a perception experiment on Swedish accents performed on 47 Swedish native speakers from the three main parts of Sweden. Speech consisting of one sentence chosen for its prosodically interesting properties and spoken by 72 speakers was played in headphones. The subjects would then try to locate the origin of every speaker on a map of Sweden. Results showed for example that the accents of the capital of Sweden (Stockholm), Gotland and southern Sweden were the ones placed correctly to the highest degree.
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| 4. |
- Ericsdotter, Christine, et al.
(author)
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Swedish
- 2012
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In: The Use of the International Phonetic Alphabet in the Choral Rehearsal. - : Scarecrow Press. - 9780810881693 ; , s. 245-251
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Book chapter (other academic/artistic)
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| 5. |
- Guasch, O., et al.
(author)
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Unified numerical simulation of the physics of voice : The EUNISON project
- 2013
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Conference paper (other academic/artistic)abstract
- In this demo we will briefly outline the scope of the European EUNISON project, which aims at a unified numerical simulation of the physics of voice by resorting to supercomputer facilities, and present some of its preliminary results obtained to date.
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| 6. |
- Lamarche, Anick, 1977-, et al.
(author)
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The Singer’s Voice Range Profile : Female Professional Opera Soloists
- 2010
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In: Journal of Voice. - : Elsevier BV. - 0892-1997 .- 1873-4588. ; 24:4, s. 410-426
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Journal article (peer-reviewed)abstract
- This work concerns the collection of 30 Voice Range Profiles (VRPs) of female operatic voice . Objectives: We address the questions: Is there a need for a singer’s protocol in VRP aquisition? Are physiological measurements sufficient or should the measurement of performance capabilities also be included? Can we address the female singing voice in general or is there a case for categorizing voices when studying phonetographic data? Method: Subjects performed a series of structured tasks involving both standard speech voice protocols and additional singing tasks. Singers also completed an extensive questionnaire. Results: Physiological VRPs differ from performance VRPs. Two new VRP metrics: the voice area above a defined level threshold, and the dynamic range independent from F0, were found to be useful in the analysis of singer VRP’s. Task design had no effect on performance VRP outcomes. Voice category differences were mainly attributable to phonation frequency based information. Conclusion: Results support the clinical importance of addressing the vocal instrument as it is used in performance. Equally important is the elaboration of a protocol suitable for the singing voice. The given context and instructions can be more important than task design for performance VRPs. Yet, for physiological VRP recordings, task design remains critical. Both types of VRPs are suggested for a singer’s voice evaluation.
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| 7. |
- Lamarche, Anick, 1977-, et al.
(author)
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The Swedish version of the Voice Handicap Index adapted for singers
- 2010
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In: Logopedics, Phoniatrics, Vocology. - : Informa UK Limited. - 1401-5439 .- 1651-2022. ; 35:3, s. 129-137
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Journal article (peer-reviewed)abstract
- This study evaluates a Swedish version of the Voice Handicap Index adapted for singers. A total of 96 healthy singers and 30 singer-patients completed the questionnaire. Validity and reliability, internal coherence, and group differences were assessed. The singer- patient group had significantly higher scores than the control group. Reliability was confirmed by high Cronbach's (> 0.78) for test-retest scores, and for each of the sub-scales. Test-retest stability in both groups was confirmed by high correlation values alpha (> 0.8). Overall scores compared closely to those from previous reports. The Swedish translation of the adapted VHI for singers (RHI-s) is valid and reliable and shows sensitivity to the singer's concerns. It can be considered a useful tool in the clinical assessment of Swedish healthy or pathological singers.
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| 8. |
- Lindström, Fredric, 1974, et al.
(author)
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Observations of the Relationship Between Noise Exposure and Preschool Teacher Voice Usage in Day-Care Center Environments
- 2011
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In: Journal of Voice. - : Elsevier BV. - 0892-1997 .- 1873-4588. ; 25:2, s. 166-172
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Journal article (peer-reviewed)abstract
- Although the relationship between noise exposure and vocal behavior (the Lombard effect) is well established, actual vocal behavior in the workplace is still relatively unexamined. The first purpose of this study was to investigate correlations between noise level and both voice level and voice average fundamental frequency (F-0) for a population of preschool teachers in their normal workplace. The second purpose was to study the vocal behavior of each teacher to investigate whether individual vocal behaviors or certain patterns could be identified. Voice and noise data were obtained for female preschool teachers (n = 13) in their workplace, using wearable measurement equipment. Correlations between noise level and voice level, and between voice level and F-0, were calculated for each participant and ranged from 0.07 to 0.87 for voice level and from 0.11 to 0.78 for F-0. The large spread of the correlation coefficients indicates that the teachers react individually to the noise exposure. For example, some teachers increase their voice-to-noise level ratio when the noise is reduced, whereas others do not.
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| 9. |
- Monson, B., et al.
(author)
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Detection of high-frequency energy changes in sustained vowels produced by singers
- 2011
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In: Journal of the Acoustical Society of America. - : Acoustical Society of America (ASA). - 0001-4966. ; 129:4, s. 2263-2268
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Journal article (peer-reviewed)abstract
- The human voice spectrum above 5 kHz receives little attention. However, there are reasons to believe that this high-frequency energy (HFE) may play a role in perceived quality of voice in singing and speech. To fulfill this role, differences in HFE must first be detectable. To determine human ability to detect differences in HFE, the levels of the 8- and 16-kHz center-frequency octave bands were individually attenuated in sustained vowel sounds produced by singers and presented to listeners. Relatively small changes in HFE were in fact detectable, suggesting that this frequency range potentially contributes to the perception of especially the singing voice. Detection ability was greater in the 8-kHz octave than in the 16-kHz octave and varied with band energy level.
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| 10. |
- Morris, R.J., et al.
(author)
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Long-Term Average Spectra From a Youth Choir Singing in Three Vocal Registers and Two Dynamic Levels
- 2012
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In: Journal of Voice. - : Elsevier BV. - 0892-1997 .- 1873-4588. ; 26:1, s. 30-36
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Journal article (peer-reviewed)abstract
- Objectives/HypothesisFew studies have reported the acoustic characteristics of youth choirs. In addition, scant data are available on youth choruses making the adjustments needed to sing at different dynamic levels in different registers. Therefore, the purpose of this study was to acoustically analyze the singing of a youth chorus to observe the evidence of the adjustments that they made to sing at two dynamic levels in three singing registers.Study DesignSingle-group observational study.MethodsThe participants were 47 members of the Brooklyn Youth Chorus who sang the same song sample in head, mixed, and chest voice at piano and forte dynamic levels. The song samples were recorded and analyzed using long-term average spectra and related spectral measures.ResultsThe spectra revealed different patterns among the registers. These differences imply that the singers were making glottal adjustments to sing the different register and dynamic level versions of the song. The duration of the closed phase, as estimated from the amplitudes of the first two harmonics, differed between the chest and head register singing at both dynamic levels. In addition, the spectral slopes differed among all three registers at both dynamic levels.ConclusionsThese choristers were able to change registers and dynamic levels quickly and with minimal prompting. Also, these acoustic measures may be a useful tool for evaluating some singing skills of young choristers.
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