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BACKGROUND: Teachers are professional voice users, and the vocal demands in the teaching profession can be considered unique. All teachers will wish to possess a voluminous, strongly-carrying voice that can be maintained for a prolonged time. This necessitated the need to understand and document the voice-acoustic characteristics of teachers. OBJECTIVES: The specific objectives were to (a) investigate the acoustic characteristics of teachers' voices, (b) compare voice acoustic characteristics between female and male teachers, and (c) compare acoustic characteristics of voice between teachers and nonteachers. PARTICIPANTS: Four hundred thirty-nine individuals congregated into two groups. Group 1 had 264 female teachers (mean age: 36.8 years) and 42 male teachers (mean age 36.8 years) with a minimum of 5 years of teaching experience. A hundred females (mean age: 37.3 years) and 33 males (mean age: 36.1 years) adults not indulging in additional, prolonged use of voice were in group 2. MATERIALS AND METHOD: Sustenance of vowel /a/ for 3 seconds at a comfortable pitch and loudness followed by a monologue on "My school" for 1 minute were audio-recorded at the locations of the participants. Multidimensional Voice Profiles and Real Time Pitch were used to analyze the phonation and monologue samples, respectively. RESULTS: Revealed that most F0 and its related measures, short- and long-term frequency perturbations were higher in female compared to the male participants. The majority of the acoustic parameters were higher in teachers compared to nonteachers of both sexes. CONCLUSION: The results, in general, confirmed a few evinced findings in females and males, strengthening the nature-controlled biophysical influence on voice. A few acoustic measures discerned voices of teachers and nonteachers and also females and males in teachers. Nonteachers of both sexes showed better acoustic characteristics of voice against teachers signifying that the extended and prolonged voice use, an occupational demand of the teaching profession, led to vocal loading affecting the acoustic characteristics of teachers' voices.
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BACKGROUND: The current study evaluated the effects of resonant voice therapy (RVT) on the long-term average spectrum (LTAS) parameters of vocally healthy trained Carnatic classical singers. The objectives of the study were i) to understand the perceptual differences and ii) to understand the change in LTAS contour parameters and the alpha ratio of the sung voice samples of the trained Carnatic classical singers before and after RVT. METHOD: The study used a quasi-experimental, pre post design and purposive-convenient sampling method. Nineteen vocally healthy singers (4 males and 15 females) aged 18-25 years (M = 23; standard deviation [SD] = 2.09) with minimum 10 years of formal Carnatic classical vocal music training volunteered to participate in the study. The audio recordings of the participants' sung aakaara (/a/ vowel singing) were obtained before and after the training. All participants were assigned to a 21-day-long RVT training program scheduled as 15-20 minutes sessions. The participants' pre-training and post-training singing samples were subjected to LTAS analysis. The spectral mean, SD, skewness, kurtosis, and alpha ratio were extracted from the sung samples. The mean and SD of the parameters were obtained using descriptive statistical methods. Wilcoxon signed-rank test was performed to evaluate significant differences in the obtained parameters across pre-training and post-training sung samples. RESULTS: Though there was an increase in perceptual vocal resonance in the post-training sung samples, the difference was observed to be statistically insignificant. The results indicated a significant difference only in the alpha ratio values, which were decreased, indicating an increase in the high-frequency energies. The descriptive statistical evaluations showed a reduction in the parameters of spectral mean, SD, skewness, and kurtosis. CONCLUSION: The observations from the current study indicated that the RVT training increased the energies of higher frequencies in the singers' voices (1-5 kHz). This high-frequency energy favored improved voice projection, imparting perceptual resonance or ringing quality of the voice.
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Aerodynamics, vital to voice production forms an important correlate of voice. The study aimed to compare subjective vocal aerodynamic measures in teachers and nonteachers and verify the effects of a few known occupational risk factors on the voice of teachers. Group 1 consisted 264 female and 42 male teachers, teaching languages and/or core subjects for a minimum of 5 years, between 30 and 45 years from the local schools of the city and surrounding nine taluks. Group 2 had 100 female and 33 male nonteachers aged 30-45 years. Audio-recordings were done individually during the midweek and in the middle of the day in a quiet environment at schools (school library) using portable digital audio recorder. Tasks: (a) Maximum Phonation time (MPT): maximum sustained productions of vowels /a/, /i/, /u/ and fricatives /s/, /z/ at comfortable pitch and loudness were noted in seconds, (b) s/z ratio computed from phonations of /s/ and /z/ sounds, and (c) Counts per Breath (CPB): counting of maximum numbers either in Kannada or English languages in a single breath. Results confirmed statistically significant increased mean values for all the measured parameters in male compared to the female participants in both groups. However, Nonteachers showed better results in almost all measured parameters compared to the teachers. Effects of known ooccupational risk factors showed mixed results and the details are discussed.
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Precautionary measures such as physical distancing, wearing a mask, and hand hygiene to suppress virus transmission necessitated a shift in the communication paradigm.The study aimed to check the effects of wearing masks (N95, surgical, and cloth) due to the COVID-19 pandemic on interpersonal communication in audiology-speech-language pathology clinical setup from a clinician perspective. A total of 105 participants, 17 males, and 88 females, in the age range of 19 to 29 years (Mean age = 21.41 years; S.D = 1.6), participated in the study. A questionnaire consisting of 15 close-ended questions grouped into five major categories, Communication Effectiveness (3 questions), Visual Cues (5 questions), Physiological Effect (4 questions), Palliative Effect (1 question), and Environment Effect (2 questions) was framed. Procedure: Participants rated the questions using a binary forced-choice as either Yes or No adapted into a google form. Results showed that most questions in all five categories received an above-average "yes" response. A significant association between questions in communication effectiveness with visual cues and physiological effects was noticed, leading to the conclusion that wearing face masks impacted overall communication by affecting various parameters of speech, majorly, the voice. It was also seen that of all the participants, 60% used N95, 32.4% used cloth, and only 7.6% used surgical face masks. Speech-language pathologists have a significant role in facilitating oral/ verbal communication when such barriers are encountered in clients with communication disorders and fellow professionals with strategies to strengthen oral/ verbal communication.
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PURPOSE: The aim of the study was to examine the effects of resonant voice therapy (RVT) on the vocal resonance of trained Carnatic singers. The specific objectives were to evaluate the effects of resonant voice therapy on the auditory perceptual judgments and acoustic source and tract parameters before and after RVT on phonation and sung voice samples. METHOD: Six vocally healthy trained Carnatic singers, three males and three females aged 18-25 years (M = 23; S.D = 2.09) participated in the study. All the participants were assigned to a 21-days-long Resonance Voice Therapy (RVT) training program. The participants' pre and post training phonation and sung samples were subjected to auditory perceptual analysis and acoustic analysis. RESULTS: The results revealed that the post training auditory perceptual ratings of the phonation task showed a statistically significant difference from the pre training scores (Z= 2.35; P = 0.019). While for the singing task, the post training perceptual ratings were not significantly different from the pre training perceptual rating scores (Z= 2.66; P = 0.08). A significant difference was observed between the pre and post training values for all the measured acoustic parameters of the phonation task. In singing task, though the fundamental frequency, third and fourth formant frequencies showed no significant difference in the pre and post training conditions (P > 0.05), the parameter of- difference between the first formant frequency and the fundamental frequency showed a significant decrease (P = 0.028). CONCLUSION: The effects of resonant voice production led to a high vocal economy, as evidenced from the improved source and filter acoustic parameters. Indication for formant tuning through vocal tract modifications, probably an enlarged pharyngeal area resulting in increased resonant voice quality in both phonation and singing tasks, is inferred from these results.
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PURPOSE: Human beatbox is a developing hip-hop branch of music wherein impersonations of the percussion drum are done using manipulations of the oro-laryngopharyngeal structures. This study presents a preliminary attempt of exploration and documentation of the spectral and temporal measures of beatbox sounds produced by a single beatbox performer. METHOD: An analytical observational study design was adopted wherein; audio recordings were taken from a professional beatboxer. The participant produced five different types of beatbox sequences consisting of classic kick, inward Ph snare with /Ê/, throat bass, and uvular oscillation sounds. The recorded beatbox sounds were segmented into preburst and postburst events and were analyzed acoustically. RESULTS: The scrutiny of the results revealed that the beatbox productions shared characteristic features of linguistic sounds , namely, the following manners of productions, stops, fricatives, and affricates, and further, oro- and laryngopharyngeal regions of the vocal tract as the places of articulation. CONCLUSION: It is interesting to note that, the art of betboxing involves wide variety of articulatory configurations and also, the use of resonatory sub-system in the vocal tract.. This knowledge could expand the professional realm of Speech-Language Pathology necessitating the professionals to equip themselves with vocal demands of this relatively budding vocal art form called the beatboxing.
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PURPOSE: The study aimed to test effect of training on the perception of speech stress in children with severe to profound hearing impairment. The first objective was to compare the speech stress perception scores of children with hearing impairment and language age-matched children with normal hearing sensitivity after short term prosody training and the second objective was to correlate between the speech stress perception scores and the language age of the children with hearing impairment. METHOD: Thirty children with normal hearing (CWNH) in the age range of 3-7 years and thirty children with hearing impairment (CWHI) who had a language age of 3-7 years participated in the study. The authors formulated 24 concrete Malayalam sentences and their picture cognate pairs (stressed and unstressed) for each sentence. The stressed and unstressed version for each sentence was audio recorded separately.The study was carried out in two phases; phase 1 included the training on acoustic cues of speech stress followed by testing in phase 2. Both the phases were attended by all the participants. RESULTS: There was a significant difference between the CWNH and CWHI wherein, children with hearing impairment had lower speech stress perception scores. However, improvements in speech stress perception were observed in children with hearing impairment after the training phase. Also, a positive correlation between the language age and the perception of speech stress scores in CWHI was found indicating that as the language age increased there was an increase in the speech stress perception scores. CONCLUSION: The pre and post training speech stress perception scores were significantly different, with higher scores on the post-training test, indicating that the short term speech stress training for the children with hearing impairment was beneficial. The positive strong correlation between stress perception scores and language age shows that, prosody perception and language learning facilitate each other. Thereby, the conventional speech-language and auditory training should expand and include prosody training from an early age for children with hearing impairment.
Subject(s)
Hearing Loss , Speech Perception , Child , Child, Preschool , Hearing , Hearing Loss/diagnosis , Humans , Language , SpeechABSTRACT
PURPOSE: The study aimed at testing the effect of supra segmental training on vocal emotional prosody perception of children with hearing impairment. The objectives of the study were to compare the perception of vocal emotional prosody (happy, sad, and neutral) in children with hearing impairment with and without a short-term prosody training and to draw correlations between the vocal emotional prosody perception scores and the subject factors - chronological age, age of hearing aid fitting, duration of the intensive intervention (speech, language and auditory training without breaks more than 30 days) and language age in children with hearing impairment. METHOD: Thirty children with hearing impairment in the age range of 4.1-9.2 years with a language age of 3-7 years participated in the study. The authors formulated 24 concrete Malayalam sentences and their picture representations and these were recorded under three emotional variations (happy, sad, and neutral). Using random sampling, the thirty participants were divided into the control group (CWHI) and the experimental (CWHIt) group. The study was carried out in two phases; phase 1 (training) attended by only the experimental group and phase 2 (testing) attended by both the groups. RESULTS: There was a significant difference between CWHI and CWHIt in the happy, sad, and neutral vocal emotional prosody conditions. Chronological age, duration of speech-language-auditory training, and language age showed a positive correlation with the vocal emotional prosody perception scores; and no correlation was found between the age of fitting of hearing aids and the emotion perception scores. CONCLUSION: The results of the study points out that with adequate prosody training, the children with hearing impairment using benefiting hearing aids could improve their vocal emotional prosody perception. Owing to the role of prosody perception in speech & language, social and cognitive development, the supra segmental training should be made an integral part of the assessment and management intervention strategies.
