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  1. AU="Caffier, Philipp P"
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  1. Article ; Online: Acute Vocal Fold Hemorrhage While Singing.

    Caffier, Philipp P / Weikert, Sebastian / Nawka, Tadeus

    Deutsches Arzteblatt international

    2023  Volume 120, Issue 7, Page(s) 114

    MeSH term(s) Humans ; Vocal Cords ; Singing ; Hemorrhage
    Language English
    Publishing date 2023-04-17
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2406159-1
    ISSN 1866-0452 ; 1866-0452
    ISSN (online) 1866-0452
    ISSN 1866-0452
    DOI 10.3238/arztebl.m2022.0356
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Tribute to the Flute: A Literature Review of Playing-Related Problems in Flautists.

    Winkler, Silvia / Lohs, Anne / Zinn-Kirchner, Zahavah M / Alotaibi, Moonef / Caffier, Philipp P

    Journal of multidisciplinary healthcare

    2024  Volume 17, Page(s) 649–671

    Abstract: Playing musical instruments places unusually high demands on specific parts of the human body. Relative to the instruments they play, musicians may experience instrument-related symptoms, as recorded in flute players. The objective was to provide an ... ...

    Abstract Playing musical instruments places unusually high demands on specific parts of the human body. Relative to the instruments they play, musicians may experience instrument-related symptoms, as recorded in flute players. The objective was to provide an overview of the study findings addressing medical problems in flautists to better understand their complaints and pave the way for more personalized healthcare. Several electronic databases (PubMed, Embase, Cochrane Library) were systematically searched in July 2022. Furthermore, the references of all included articles were reviewed for additionally relevant sources. The resulting set of studies was summarized in a table, with quality assessment according to the SIGN grading system. From an initial 433 hits, the search yielded 95 studies with a total of 32,600 musicians, including at least 2134 flautists. Among the latter, evidence was found for musculoskeletal, neurological, dermatological, temporomandibular, and hearing complaints, overuse and reflux symptoms, velopharyngeal insufficiency, as well as upper and lower airway impairment. Other specialists may be consulted equally often and should be sensitive to the particular medical problems in flautists. Future studies would ideally contain specific outcome analyses on an international scale and consider flautists as an individual subgroup within a larger number of total participants.
    Language English
    Publishing date 2024-02-14
    Publishing country New Zealand
    Document type Journal Article ; Review
    ZDB-ID 2453343-9
    ISSN 1178-2390
    ISSN 1178-2390
    DOI 10.2147/JMDH.S448301
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: For Fiddlers on the Roof and in the Pit: Healthcare and Epidemiology of Playing-Related Problems in Violinists.

    Zinn-Kirchner, Zahavah M / Alotaibi, Moonef / Mürbe, Dirk / Caffier, Philipp P

    Journal of multidisciplinary healthcare

    2023  Volume 16, Page(s) 2485–2497

    Abstract: Musicians, specifically violinists, may experience pain or loss of function as a result of poor playing hygiene, environmental factors, and insufficient guidance from teachers, parents, conductors, and physicians. The causal occurrence of these ... ...

    Abstract Musicians, specifically violinists, may experience pain or loss of function as a result of poor playing hygiene, environmental factors, and insufficient guidance from teachers, parents, conductors, and physicians. The causal occurrence of these pathologies and the efficacy of general treatment, along with referral to other specialists for adjunct therapies and rehabilitation, were examined in this literature review. A systematic PubMed search was conducted in May 2022 to gain insight into the current state of the published literature. Inclusion criteria were cross-sectional or comparative studies that address relevant pathologies among violinists by specialty. The search resulted in 25 cross-sectional, 5 comparative studies, and 1 case review including a total of 6010 musicians, among them at least 920 violinists. Orthopedists, neurologists, dentists/orthodontists, dermatologists, and audiologists are most commonly consulted to treat violinists' complaints. Other internists and various paramedical specialists can equally be affected and should be sensitive to the complaints of musicians. In conclusion, the field of performing arts medicine is extremely wide and requires multidisciplinary specialist attention. The studies chosen highlight that violinists may suffer great discomfort at the hands of their instrument and merit adequate guidance from physicians in order to be able to continue playing in a safe, ergonomic way.
    Language English
    Publishing date 2023-08-28
    Publishing country New Zealand
    Document type Journal Article ; Review
    ZDB-ID 2453343-9
    ISSN 1178-2390
    ISSN 1178-2390
    DOI 10.2147/JMDH.S425406
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Harnessing Machine Learning in Vocal Arts Medicine: A Random Forest Application for "Fach" Classification in Opera.

    Wang, Zehui / Müller, Matthias / Caffier, Felix / Caffier, Philipp P

    Diagnostics (Basel, Switzerland)

    2023  Volume 13, Issue 18

    Abstract: Vocal arts medicine provides care and prevention strategies for professional voice disorders in performing artists. The issue of correct "Fach" determination depending on the presence of a lyric or dramatic voice structure is of crucial importance for ... ...

    Abstract Vocal arts medicine provides care and prevention strategies for professional voice disorders in performing artists. The issue of correct "Fach" determination depending on the presence of a lyric or dramatic voice structure is of crucial importance for opera singers, as chronic overuse often leads to vocal fold damage. To avoid phonomicrosurgery or prevent a premature career end, our aim is to offer singers an improved, objective fach counseling using digital sound analyses and machine learning procedures. For this purpose, a large database of 2004 sound samples from professional opera singers was compiled. Building on this dataset, we employed a classic ensemble learning method, namely the Random Forest algorithm, to construct an efficient fach classifier. This model was trained to learn from features embedded within the sound samples, subsequently enabling voice classification as either lyric or dramatic. As a result, the developed system can decide with an accuracy of about 80% in most examined voice types whether a sound sample has a lyric or dramatic character. To advance diagnostic tools and health in vocal arts medicine and singing voice pedagogy, further machine learning methods will be applied to find the best and most efficient classification method based on artificial intelligence approaches.
    Language English
    Publishing date 2023-09-06
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662336-5
    ISSN 2075-4418
    ISSN 2075-4418
    DOI 10.3390/diagnostics13182870
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: New objective timbre parameters for classification of voice type and fach in professional opera singers.

    Müller, Matthias / Wang, Zehui / Caffier, Felix / Caffier, Philipp P

    Scientific reports

    2022  Volume 12, Issue 1, Page(s) 17921

    Abstract: Voice timbre is defined as sound color independent of pitch and volume, based on a broad frequency band between 2 and 4 kHz. Since there are no specific timbre parameters, previous studies have come to the very general conclusion that the center ... ...

    Abstract Voice timbre is defined as sound color independent of pitch and volume, based on a broad frequency band between 2 and 4 kHz. Since there are no specific timbre parameters, previous studies have come to the very general conclusion that the center frequencies of the singer's formants are somewhat higher in the higher voice types than in the lower ones. For specification, a database was created containing 1723 sound examples of various voice types. The energy distribution in the frequency bands of the singer's formants was extracted for quantitative analysis. When the energy distribution function reached 50%, the corresponding absolute frequency in Hz was defined as Frequency of Half Energy (FHE). This new parameter quantifies the timbre of a singing voice as a concrete measure, independent of fundamental frequency, vowel color and volume. The database allows assigning FHE means ± SD as characteristic or comparative values for sopranos (3092 ± 284 Hz), tenors (2705 ± 221 Hz), baritones (2454 ± 206 Hz) and basses (2384 ± 164 Hz). In addition to vibrato, specific timbre parameters provide another valuable feature in vocal pedagogy for classification of voice type and fach according to the lyric or dramatic character of the voice.
    MeSH term(s) Humans ; Singing ; Voice Quality ; Voice ; Occupations ; Sound
    Language English
    Publishing date 2022-10-26
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-022-22821-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Validation and Classification of the 9-Item Voice Handicap Index (VHI-9i).

    Caffier, Felix / Nawka, Tadeus / Neumann, Konrad / Seipelt, Matthias / Caffier, Philipp P

    Journal of clinical medicine

    2021  Volume 10, Issue 15

    Abstract: The international nine-item Voice Handicap Index (VHI-9i) is a clinically established short-scale version of the original VHI, quantifying the patients' self-assessed vocal handicap. However, the current vocal impairment classification is based on ... ...

    Abstract The international nine-item Voice Handicap Index (VHI-9i) is a clinically established short-scale version of the original VHI, quantifying the patients' self-assessed vocal handicap. However, the current vocal impairment classification is based on percentiles. The main goals of this study were to establish test-retest reliability and a sound statistical basis for VHI-9i severity levels. Between 2009 and 2021, 17,660 consecutive cases were documented. A total of 416 test-retest pairs and 3661 unique cases with complete multidimensional voice diagnostics were statistically analyzed. Classification candidates were the overall self-assessed vocal impairment (VHIs) on a four-point Likert scale, the dysphonia severity index (DSI), the vocal extent measure (VEM), and the auditory-perceptual evaluation (GRB scale). The test-retest correlation of VHI-9i total scores was very high (r = 0.919,
    Language English
    Publishing date 2021-07-28
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662592-1
    ISSN 2077-0383
    ISSN 2077-0383
    DOI 10.3390/jcm10153325
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Quantifizierung des Outcomes phonochirurgischer Interventionen bei benignen Stimmlippenläsionen

    Salmen, Tatjana / Caffier, Philipp P.

    Sprache · Stimme · Gehör

    2018  Volume 42, Issue 04, Page(s) 168–174

    Keywords phonochirurgischer Outcome ; gutartige Stimmlippenläsionen ; Stimmdiagnostik ; Stimmumfangsmaß (SUM) ; Stimmfeldquantifizierung ; phonosurgical outcome ; benign vocal fold lesions ; voice diagnostics ; vocal extent measure (VEM) ; voice range profile quantification
    Language German
    Publishing date 2018-12-01
    Publisher © Georg Thieme Verlag KG
    Publishing place Stuttgart ; New York
    Document type Article
    ZDB-ID 538321-3
    ISSN 1439-1260 ; 0342-0477
    ISSN (online) 1439-1260
    ISSN 0342-0477
    DOI 10.1055/a-0682-1469
    Database Thieme publisher's database

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  8. Conference proceedings: Validierung und Klassifizierung des 9-item Voice Handicap Index (VHI-9i)

    Caffier, Philipp P. / Caffier, Felix / Neumann, Konrad / Seipelt, Matthias / Nawka, Tadeus

    2022  , Page(s) V12

    Abstract: Hintergrund: Zur diagnostischen Erfassung der subjektiven Stimmbeeinträchtigung werden der Voice Handicap Index (VHI) und seine Kurzformen eingesetzt. Die bisherige 4-stufige Schweregradeinteilung des VHI-9i, der 9-item Kurzform des Voice Handicap Index, ...

    Event/congress 38. Wissenschaftliche Jahrestagung der Deutschen Gesellschaft für Phoniatrie und Pädaudiologie (DGPP); Leipzig; Deutsche Gesellschaft für Phoniatrie und Pädaudiologie; 2022
    Abstract Hintergrund: Zur diagnostischen Erfassung der subjektiven Stimmbeeinträchtigung werden der Voice Handicap Index (VHI) und seine Kurzformen eingesetzt. Die bisherige 4-stufige Schweregradeinteilung des VHI-9i, der 9-item Kurzform des Voice Handicap Index, beruht dabei auf den Perzentilen einer repräsentativen Untersuchung von 718 Patienten. Hauptziel unserer Studie war es, die Einteilung der Schweregrade anhand einer deutlich größeren Anzahl Untersuchter zu validieren sowie die Grenzwerte der einzelnen Schweregradklassen durch statistische Berechnungen zu bestätigen oder anzupassen.
    Material und Methoden: In der DiVAS-Datenbank (XION GmbH) der Klinik für Audiologie und Phoniatrie der Charité – Universitätsmedizin Berlin wurden zwischen 2009 und 2021 insgesamt 17.660 aufeinanderfolgende Fälle dokumentiert, von denen nach Anwendung der Ausschluss- (Jitter >5%) bzw. Einschlusskriterien (nur Erstuntersuchungen, komplette multidimensionale Stimmfunktionsdiagnostik nach ELS-Standard) 3.661 vollständige und eindeutige Fälle übrig blieben. Statistisch analysiert wurden u.a. die Reliabilität des VHI-9i-Fragebogens (Test-Retest), Korrelationen (Pearsons r), sowie die Abhängigkeit von Alter (Regressionsanalyse), Geschlecht (t-Test) und beruflichem Stimmgebrauch (Kruskal-Wallis H-Test).
    Ergebnisse: Der VHI-9i erwies sich als äußerst reliabel, ohne relevanten Einfluss von Geschlecht, beruflicher Stimmbelastung und Alter. Durch die Korrelation mit anderen etablierten Stimmfunktionsparametern und die Klassifikation mittels statistischer Verfahren konnte der VHI-9i erfolgreich validiert werden. Die Selbsteinschätzung der aktuellen Stimmbeeinträchtigung (VHIs) zeigte sich prädestiniert für eine Klassifizierung.
    Fazit: Aufgrund unserer Untersuchungsergebnisse empfehlen wir folgende VHI-9i-Klassifikation: Schweregrad 0 (keine Stimmstörung): 0≤7 Punkte; Schweregrad 1 (geringgradige Stimmstörung): 8≤16 Punkte; Schweregrad 2 (mittelgradige Stimmstörung): 17≤26 Punkte; Schweregrad 3 (hochgradige Stimmstörung): 27≤36 Punkte.
    Keywords Medizin, Gesundheit
    Publishing date 2022-09-26
    Publisher German Medical Science GMS Publishing House; Düsseldorf
    Document type Conference proceedings
    DOI 10.3205/22dgpp16
    Database German Medical Science

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  9. Article ; Online: Pathology-Related Influences on the VEM: Three Years' Experience since Implementation of a New Parameter in Phoniatric Voice Diagnostics.

    Müller, Constanze / Caffier, Felix / Nawka, Tadeus / Müller, Matthias / Caffier, Philipp P

    BioMed research international

    2020  Volume 2020, Page(s) 5309508

    Abstract: The vocal extent measure (VEM) represents a new diagnostic tool to express vocal capacity by quantifying the dynamic performance and frequency range of voice range profiles (VRPs). For VEM calculation, the VRP area is multiplied by the quotient of the ... ...

    Abstract The vocal extent measure (VEM) represents a new diagnostic tool to express vocal capacity by quantifying the dynamic performance and frequency range of voice range profiles (VRPs). For VEM calculation, the VRP area is multiplied by the quotient of the theoretical perimeter of a circle with equal VRP area and the actual VRP perimeter. Since different diseases affect voice function to varying degrees, pathology-related influences on the VEM should be investigated more detailed in this retrospective study, three years after VEM implementation. Data was obtained in a standardized voice assessment comprising videolaryngostroboscopy, voice handicap index (VHI-9i), and acoustic-aerodynamic analysis with automatic calculation of VEM and dysphonia severity index (DSI). The complete dataset comprised 1030 subjects, from which 994 adults (376 male, 618 female; 18-86 years) were analyzed more detailed. The VEM differed significantly between pathology subgroups (
    MeSH term(s) Adolescent ; Adult ; Age Distribution ; Aged ; Aged, 80 and over ; Cohort Studies ; Dysphonia/physiopathology ; Female ; Humans ; Male ; Middle Aged ; Phonetics ; Regression Analysis ; Speech Acoustics ; Voice ; Voice Disorders/physiopathology ; Young Adult
    Language English
    Publishing date 2020-12-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2698540-8
    ISSN 2314-6141 ; 2314-6133
    ISSN (online) 2314-6141
    ISSN 2314-6133
    DOI 10.1155/2020/5309508
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Monitoring the Outcome of Phonosurgery and Vocal Exercises with Established and New Diagnostic Tools.

    Seipelt, Matthias / Möller, Andreas / Nawka, Tadeus / Gonnermann, Ute / Caffier, Felix / Caffier, Philipp P

    BioMed research international

    2020  Volume 2020, Page(s) 4208189

    Abstract: Instrument-assisted measuring procedures expand the options within phoniatric diagnostics by quantifying the condition of the voice. The aim of this study was to examine objective treatment-associated changes of the recently developed vocal extent ... ...

    Abstract Instrument-assisted measuring procedures expand the options within phoniatric diagnostics by quantifying the condition of the voice. The aim of this study was to examine objective treatment-associated changes of the recently developed vocal extent measure (VEM) and the established dysphonia severity index (DSI) in relation to subjective tools, i.e., self-evaluation via voice handicap index (VHI-12) and external evaluation via auditory-perceptual assessment of hoarseness (
    MeSH term(s) Acoustics ; Adolescent ; Adult ; Aged ; Diagnostic Techniques and Procedures ; Dysphonia/diagnosis ; Dysphonia/physiopathology ; Female ; Humans ; Larynx/physiopathology ; Larynx/surgery ; Male ; Middle Aged ; Monitoring, Physiologic ; Severity of Illness Index ; Treatment Outcome ; Vocal Cords/physiopathology ; Vocal Cords/surgery ; Voice/physiology ; Young Adult
    Language English
    Publishing date 2020-01-23
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2698540-8
    ISSN 2314-6141 ; 2314-6133
    ISSN (online) 2314-6141
    ISSN 2314-6133
    DOI 10.1155/2020/4208189
    Database MEDical Literature Analysis and Retrieval System OnLINE

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