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    Wyświetlanie 1-13 z 13
    Tytuł:
    Evaluation of New Polish Articulation Lists (NAL-93) in the Presence of Various Speech-Like Maskers
    Autorzy:
    Schelenz, Anna
    Skrodzka, Ewa
    Powiązania:
    https://bibliotekanauki.pl/articles/177830.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    NAL-93
    babble noise
    speech noise
    speech-in-noise test
    Speech Reception Threshold
    Opis:
    The main goal of the research was to obtain a set of data for ability of speech in noise recognition using Polish word test (New Articulation Lists – NAL-93) with two different masking signals. The attempt was also made to standardise the background noise for Polish speech tests by creating babble noise for NAL-93. Two types of background noise were used for Polish word test – the babble noise and the speech noise. The short method was chosen in the study as it provided similar results to constant stimuli metod using less word material. The experiment using both maskers was presented to 10 listeners with normal hearing. The mean SRT values for NAL-93 were −3.4 dB SNR for speech noise and 3.0 dB SNR for babble noise. In this regard, babble noise provided more efficient results. However, the SRT parameter for speech noise was more similar to values obtained for other Polish speech tests. The measurement of speech recognition using Polish word test is possible for both types of masking signals presented in the study. The decision as to which type of noise would be better in practice of hearing aid prosthetics remains an open-end question.
    Źródło:
    Archives of Acoustics; 2020, 45, 3; 393-400
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of Speech Intensity on the Callsign Acquisition Test (CAT) and Modified Rhyme Test (MRT) Presented in Noise
    Autorzy:
    Blue-Terry, M.
    McBride, M.
    Letowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/177738.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    speech intelligibility
    speech intensity
    speech-to-noise ratio
    Opis:
    This study sought to evaluate the effect of speech intensity on performance of the Callsign Acquisition Test (CAT) and Modified Rhyme Test (MRT) presented in noise. Fourteen normally hearing listeners performed both tests in 65 dB A white background noise. Speech intensity varied while background noise remained constant to form speech-to-noise ratios (SNRs) of -18, -15, -12, -9, and -6 dB. Results showed that CAT recognition scores were significantly higher than MRT scores at the same SNRs; how- ever, the scores from both tests were highly correlated and their relationship for the SNRs tested can be expressed by a simple linear function. The concept of CAT can be easily ported to other languages for testing speech communication under adverse listening conditions
    Źródło:
    Archives of Acoustics; 2012, 37, 2; 199-203
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enhancing Speech Recognition in Adverse Listening Environments: The Impact of Brief Musical Training on Older Adults
    Autorzy:
    Nandakumar, Akhila R
    Somashekara, Haralakatta Shivananjappa
    Kanagokar, Vibha
    Pitchaimuthu, Arivudai Nambi
    Powiązania:
    https://bibliotekanauki.pl/articles/31339763.pdf
    Data publikacji:
    2024
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    musical training
    carnatic music
    speech recognition in noise
    speech recognition in reverberation
    Opis:
    The present research investigated the effects of short-term musical training on speech recognition in adverse listening conditions in older adults. A total of 30 Kannada-speaking participants with no history of gross otologic, neurologic, or cognitive problems were divided equally into experimental (M = 63 years) and control groups (M = 65 years). Baseline and follow-up assessments for speech in noise (SNR50) and reverberation was carried out for both groups. The participants in the experimental group were subjected to Carnatic classical music training, which lasted for seven days. The Bayesian likelihood estimates revealed no difference in SNR50 and speech recognition scores in reverberation between baseline and followed-up assessment for the control group. Whereas, in the experimental group, the SNR50 reduced, and speech recognition scores improved following musical training, suggesting the positive impact of music training. The improved performance on speech recognition suggests that short-term musical training using Carnatic music can be used as a potential tool to improve speech recognition abilities in adverse listening conditions in older adults.
    Źródło:
    Archives of Acoustics; 2024, 49, 1; 3-9
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New trends in the prevention of occupational noise-induced hearing loss
    Autorzy:
    Sliwinska-Kowalska, Mariola
    Powiązania:
    https://bibliotekanauki.pl/articles/2116178.pdf
    Data publikacji:
    2020-10-20
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    predictive models
    cochlear neuropathy
    temporary threshold shift
    individual susceptibility to noise
    speech in noise
    medical guidelines
    Opis:
    Noise exposure during lifespan is one of the main causes of hearing loss. The highest risk of noise-induced hearing loss (NIHL) is related to exposures in the workplace, and affects about 7% of the population. Occupational NIHL is irreversible, thus its prevention must be considered a priority. Although current hearing conservation programs (HCPs) have proved to be very beneficial, the incidence of occupational NIHL is still high, reaching about 18% of overexposed workers. This paper reviews recent research on the effects of noise on hearing in pursuit of more effective methods for the prevention of occupational NIHL. The paper discusses the translational significance of noise-induced cochlear neuropathy, as recently shown in animals, and the concept of hidden hearing loss in relation to current NIHL damage risk criteria. The anticipated advantages of monitoring the incidents of the temporary threshold shift (TTS) in workers exposed to high levels of noise have been analyzed in regard to the preclinical diagnostics of NIHL, i.e., at the stage when hearing loss is still reversible. The challenges, such as introducing speech-in-noise audiometry and TTS computational predictive models into HCPs, have been discussed. Finally, the paper underscores the need to develop personalized medical guidelines for the prevention of NIHL and to account for several NIHL risk factors other than these included in the ISO 1999:2013 model. Implementing the steps mentioned above would presumably further reduce the incidence of occupational NIHL, as well as associated social costs.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2020, 33, 6; 841-848
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Speech Reception Thresholds for Polish Language Word and Sentence Tests Presented in Noise
    Autorzy:
    Schelenz, A.
    Skrodzka, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/177040.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    speech reception threshold in noise
    Polish Sentence Test
    Polish Sentence Matrix Test
    new articulation lists
    Opis:
    The aim of the study was to determine the signal-to-noise ratio (SNR) for the Speech Reception Threshold (SRT) for young persons with normal hearing. The following three tests available for Polish language were used: the New Articulation Lists (NAL-93) version of 2011, the Polish Sentence Test (PST) and the Polish Sentence Matrix Test (PSMT). When using PST and PSMT the masking signal was babule noise made of the language material contained in the test. For NAL-93 the masking signal was speech noise. The speech reception threshold (SRT) was found to be (−6:8 ± 1.1), (−4:8 ± 1.6), (−3:5 ± 1.8) and (−3:4 ± 2.0) dB SNR for PST, PSMT, NAL-93 (constant stimuli method) and NAL-93 (short method), respectively. The values of SRT depend on semantic redundancy of the language material. Differences in SRT were statistically non-significant only for NAL-93 (constant stimuli method) and NAL-93 (short method). Moreover, it was shown that the time needed for presentation of a single word list (NAL-93, short method) or single sentence list (PST, PSMT) was comparable and equal to 2-3 minutes. The most uniform SRT values were obtained for PST. The PSMT was the least demanding for the listener, experimenter and equipment.
    Źródło:
    Archives of Acoustics; 2018, 43, 4; 603-612
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Relationship Between Chinese Speech Intelligibility of Elderly and Speech Transmission Index
    Autorzy:
    Peng, Jianxin
    Zeng, Jiazhong
    Zhao, Yuezhe
    Powiązania:
    https://bibliotekanauki.pl/articles/1953494.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    speech intelligibility
    speech transmission index
    signal-to-noise ratio
    background noise level
    speech sound pressure level
    reverberation time
    Opis:
    In this paper, the relationship between Chinese speech intelligibility (CSI) scores of the elderly aged 60-69 and over 70 years old, and speech transmission index (STI) were investigated through the auralization method under different reverberation time and background noise levels (BNL, 40 dBA and 55 dBA). The results show that the CSI scores of the elderly are significantly worse than those of young adults. For the elderly over 70, the CSI scores become much lower than those of young adults. To be able to achieve the same CSI, the elderly, especially those over 70, need much higher STI and greater SNR than the young. The elderly aged 60-69 and over 70 need to improve their STI by 0.419 and 0.058 respectively under BNL 40 dBA, as well as 0.282 and 0.072 respectively under BNL 55 dBA, so as to obtain the same CSI scores as the young adults.
    Źródło:
    Archives of Acoustics; 2021, 46, 2; 229-235
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chinese Word Identification and Sentence Intelligibility in Primary School Classrooms
    Autorzy:
    Peng, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/177322.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    speech identification
    reverberation time
    signal-to-noise ratio
    classroom
    speech transmission index
    children
    Opis:
    The Chinese word identification and sentence intelligibility are evaluated by grades 3 and 5 students in the classrooms with different reverberation times (RTs) from three primary school under different signal-to-noise ratios (SNRs). The relationships between subjective word identification and sentence intelligibility scores and speech transmission index (STI) are analyzed. The results show that both Chinese word identification and sentence intelligibility scores for grades 3 and 5 students in the classroom increased with the increase of SNR (and STI), increased with the increase of the age of students, and decreased with the increase of RT. To achieve a 99% sentence intelligibility score, the STIs required for grades 3, grade 5 students, and adults are 0.71, 0.61, and 0.51, respectively. The required objective acoustical index determined by a certain threshold of the word identification test might be underestimated for younger children (grade 3 students) in classroom but overestimated for adults. A method based on the sentence test is more useful for speech intelligibility evaluation in classrooms than that based on the word test for different age groups. Younger children need more favorable classroom acoustical environment with a higher STI than older children and adults to achieve the optimum speech communication in the classroom.
    Źródło:
    Archives of Acoustics; 2016, 41, 2; 213-219
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Acoustics of Classrooms in Primary Schools - Results of the Reverberation Time and the Speech Transmission Index Assessments in Selected Buildings
    Autorzy:
    Mikulski, W.
    Radosz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/177048.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    primary school noise
    reverberation time
    speech transmission index
    STI
    Opis:
    The article presents results of our own research regarding acoustic properties of 110 classrooms in five typical primary schools in Warsaw. The target of the re- search was to assess the classrooms using established criteria. These criteria include the reverberation time and the speech transmission index. The research has shown a large diversity of acoustic properties of classrooms within each of the schools and between the schools, resulting from the classroom equipment and the school building construction. In addition, the assessment has indicated that classrooms in schools researched do not meet the established acoustic criteria (reverberation time and speech transmission index). Because the classroom equipment is different for younger forms (integrated teaching) and for older forms (subject teaching), the results have been analyzed separately for rooms for younger forms (0–III) and for rooms for older forms (IV–VI). Synthetic results prove the advisability of such di- vision. Correlation analysis has been conducted for the speech transmission index STI and reverberation time Tmf , as well as for the speech transmission index STI and the suggested reverberation time Twf defined in a similar manner as Tmf , but in a wider frequency range. The correlation between the speech transmission index STI and Twf is higher than that between the STI index and Tmf . The reverberation time Twf can therefore be used for a more precise assessment of acoustic properties of interiors with regard to verbal communication than Tmf . In addition, the paper presents estimated analysis results of the influence of selected classroom equipment (carpets) on its acoustic properties.
    Źródło:
    Archives of Acoustics; 2011, 36, 4; 777-793
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Experimental Study of Acoustic Comfort in Open Space Banks Based on Speech Intelligibility and Noise Annoyance Measures
    Autorzy:
    Golmohammadi, R.
    Aliabadi, M.
    Nezami, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/176406.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    acoustic comfort
    open-space banks
    speech intelligibility
    noise annoyance
    Opis:
    Tasks requiring intensive concentration are more vulnerable to noise than routine tasks. Due to the high mental workload of bank employees, this study aimed to evaluate acoustic comfort in open-space banks based on speech intelligibility and noise annoyance metrics. Acoustic metrics including preferred noise criterion (PNC), speech transmission index (STI), and signal to noise ratio (SNR) were measured in seventeen banks (located in Hamadan, a western province of Iran). For subjective noise annoyance assessments, 100-point noise annoyance scales were completed by bank employees during activities. Based on STI (0.56±0.09) and SNR (20.5±8.2 dB) values, it was found that speech intelligibilities in the workstations of banks were higher than the satisfactory level. However, PNC values in bank spaces were 48.2±5.5 dB, which is higher than the recommended limit value for public spaces. In this regard, 95% of the employees are annoyed by background noise levels. The results show irrelevant speech is the main source of subjective noise annoyance among employees. Loss of concentration is the main consequence of background noise levels for employees. The results confirmed that acoustic properties of bank spaces provide enough speech intelligibility, while staff’s noise annoyance is not acceptable. It can be concluded that due to proximity of workstations in open-space banks, access to very short distraction distance is necessary. Therefore, increasing speech privacy can be prioritised to speech intelligibility. It is recommended that current desk screens are redesigned in order to reduce irrelevant speech between nearby workstations. Staff’s training about acoustic comfort can also manage irrelevant speech characteristics during work time.
    Źródło:
    Archives of Acoustics; 2017, 42, 2; 333-347
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adaptive Algorithms for Enhancement of Speech Subject to a High-Level Noise
    Autorzy:
    Latos, M.
    Pawełczyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/178055.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    speech enhancement
    adaptive system
    line enhancer
    LMS algorithm
    high-level noise
    nonstationary noise
    earplug
    active noise control
    Opis:
    There are many industrial environments which are exposed to a high-level noise, sometimes much higher than the level of speech. Verbal communication is then practically unfeasible. In order to increase the speech intelligibility, appropriate speech enhancement algorithms can be used. It is impossible to filter off the noise completely from the acquired signal by using a conventional filter, because of two reasons. First, the speech and the noise frequency contents are overlapping. Second, the noise properties are subject to change. The adaptive realisation of the Wienerbased approach can be, however, applied. Two structures are possible. One is the line enhancer, where the predictive realisation of the Wiener approach is used. The benefit of using this structure it that it does not require additional apparatus. The second structure takes advantage of the high level of noise. Under such condition, placing another microphone, even close to the primary one, can provide a reference signal well correlated with the noise disturbing the speech and lacking the information about the speech. Then, the classical Wiener filter can be used, to produce an estimate of the noise based on the reference signal. That noise estimate can be then subtracted from the disturbed speech. Both algorithms are verified, based on the data obtained from the real industrial environment. For laboratory experiments the G.R.A.S. artificial head and two microphones, one at back side of an earplug and another at the mouth are used.
    Źródło:
    Archives of Acoustics; 2010, 35, 2; 203-212
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of text to speach synthesis system based on the harmonic and noise model
    Koncepcja układu syntezy mowy z tekstu opartego na modelu harmoniczne i szum
    Autorzy:
    Sawicki, A.
    Zubrycki, P.
    Petrovsky, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/341087.pdf
    Data publikacji:
    2009
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    synteza mowy
    model harmoniczne i szum
    speech synthesis
    TTS
    harmonic and noise model
    Opis:
    This is a proposal of concatenative text to speech synthesizer for the Polish language, based on diphones and ”Harmonics and Noise Model”(HNM). HNM has been successfully applied on a speech encoder and decoder, resulting in a high-quality of processed speech at low bit rate. Applying this model to speech synthesis system allows obtaining good quality of synthesized speech, and the small size of database parameters. The proposed project consists of two main modules. The Natural Language Processing (NLP) is used to analyse and convert the written text for phonemes and diphones using morphological rules. NLP discovers at the same time prosodic features for later modification of synthesized speech parameters in order to obtain the stress and voice intonation. The second section is a synthesis system, derived from speech decoder, preceded by a system of adapting the parameters of speech based on prosodic rules. The system of speech synthesis from the parameters is working in the frequency domain and uses the frequency spectrum envelope, which easily allows modifying the frequency, amplitude and duration of the signal when applying the prosodic rules. The algorithm of continuous phase designation at the speech frame borders allows concatenating portions of synthesized speech and diphones without phase distortion on the merger. Speech synthesizer operates on the diphone database, created applying fragmentation of recorded speech signal representing the pairs of phonemes. Sounds related to diphones are analyzed by speech encoder. It provides the parameters that described harmonic and noise components of speech, using the linear prediction filter LSF coefficients, resulting in a small size of diphone database.
    Artykuł przedstawia projekt konkatenacyjnego syntezatora mowy z tekstu dla języka polskiego, opartego na difonach i modelu Harmoniczne i Szum. Model Harmoniczne i Szum został z powodzeniem zastosowany w układzie kodera i dekodera mowy, dając w rezultacie dobrą jakość przetwarzanej mowy przy niskiej przepływności bitowej. Zastosowanie tego modelu do układu syntezy mowy pozwala na uzyskanie dobrej jako sci syntezowanej mowy, oraz niewielki rozmiar bazy parametrów. Układ składa się z dwóch głównych modułów. Moduł Naturalnego Przetwarzania Języka służy do analizy i zamiany tekstu pisanego na fonemy oraz difony, przy wykorzystaniu reguł morfologicznych. Procesor tekstu wyznacza jednocześnie warunki prozodii związane z późniejszą modyfikacją parametrów syntezowanego głosu w celu uzyskania akcentowania i intonacji. Drugim układem jest moduł syntezy, oparty na dekoderze mowy poprzedzonym systemem adaptacji parametrów mowy w oparciu o wyznaczone wcześniej reguły prozodyczne. Układ syntezy mowy z parametrw działa w dziedzinie czstotliwości i bazuje na obwiedni spektrum, co w prosty sposób pozwala na modyfikację czstotliwości, amplitudy i czasu trwania sygnału przy stosowaniu reguł prozodycznych. Algorytm wyznaczania ciągłej fazy na granicach ramek sygnału mowy pozwala na łączenie fragmentów syntezowanej mowy oraz poszczególnych difonów bez zniekształceń fazowych na połączeniu. Syntezator mowy operuje na bazie difonów, stworzonej na podstawie fragmentaryzacji nagranego sygnału mowy na części, reprezentujące połączenia par fonemów. Dźwięki odpowiadające difonom są analizowane przez moduł analizy mowy. Dostarcza on ciąg parametrów reprezentujących harmoniczne i szumowe komponenty sygnału mowy, opisane za pomocą filtrów liniowej predykcji i współczynników LSF, dając w rezultacie niewielkiej wielkości baze difonów.
    Źródło:
    Zeszyty Naukowe Politechniki Białostockiej. Informatyka; 2009, 4; 111-125
    1644-0331
    Pojawia się w:
    Zeszyty Naukowe Politechniki Białostockiej. Informatyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of the Lombard effect based on a machine learning approach
    Autorzy:
    Korvel, Gražina
    Treigys, Povilas
    Kąkol, Krzysztof
    Kostek, Bożena
    Powiązania:
    https://bibliotekanauki.pl/articles/24200693.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    Lombard effect
    speech detection
    noise signal
    self similarity matrix
    convolutional neural network
    efekt Lombarda
    wykrywanie mowy
    sygnał szumowy
    sieć neuronowa konwolucyjna
    Opis:
    The Lombard effect is an involuntary increase in the speaker’s pitch, intensity, and duration in the presence of noise. It makes it possible to communicate in noisy environments more effectively. This study aims to investigate an efficient method for detecting the Lombard effect in uttered speech. The influence of interfering noise, room type, and the gender of the person on the detection process is examined. First, acoustic parameters related to speech changes produced by the Lombard effect are extracted. Mid-term statistics are built upon the parameters and used for the self-similarity matrix construction. They constitute input data for a convolutional neural network (CNN). The self-similarity-based approach is then compared with two other methods, i.e., spectrograms used as input to the CNN and speech acoustic parameters combined with the k-nearest neighbors algorithm. The experimental investigations show the superiority of the self-similarity approach applied to Lombard effect detection over the other two methods utilized. Moreover, small standard deviation values for the self-similarity approach prove the resulting high accuracies.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2023, 33, 3; 479--492
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wyniki badań wpływu adaptacji akustycznych sal lekcyjnych na jakość komunikacji werbalnej
    Effects of acaoustic adaptation of classrooms on the quality of verbal communication
    Autorzy:
    Mikulski, Witold
    Powiązania:
    https://bibliotekanauki.pl/articles/2168418.pdf
    Data publikacji:
    2014-10-30
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    hałas
    choroby zawodowe
    szkoły
    akustyka pomieszczeń
    wskaźnik transmisji mowy
    czas pogłosu
    noise
    occupational diseases
    schools
    room acoustics
    speech transmission index
    reverberation time
    Opis:
    Wstęp: Choroby narządu głosu nauczycieli są wynikiem jego nadmiernego obciążenia. Jednym ze sposobów jego zmniejszenia jest obniżenie tła akustycznego podczas prowadzenia lekcji. Umożliwia to zwiększenie chłonności akustycznej pomieszczenia. Wpływa ona także na wzrost zrozumiałości mowy, którą określa się czasem pogłosu pomieszczenia i wskaźnikiem transmisji mowy STI. W artykule podano wyniki badań wpływu adaptacji akustycznych sal lekcyjnych na jakość komunikacji werbalnej. Celem adaptacji było uzyskanie zrozumiałości mowy na poziomie dobrym lub doskonałym. Materiał i metody: W artykule podano kryteria oceny sal lekcyjnych pod względem zrozumiałości mowy. Parametry te określono metodami pomiarowymi według PN-EN ISO 3382-2:2010 i PN-EN 60268-16:2011. Wykonano i oceniono adaptację akustyczną w 2 salach lekcyjnych. Wyniki: Po adaptacji akustycznej czas pogłosu dla częstotliwości 1 kHz zmniejszył się: w sali nr 1 z 1,45 s do 0,44 s, a w sali nr 2 - z 1,03 s do 0,37 s (maks. czas pogłosu: 0,65 s). Jednocześnie wskaźnik transmisji mowy zwiększył się: w sali nr 1 z 0,55 (zrozumiałość mowy zadowalająca) do 0,75 (zrozumiałość mowy dobra, bliska doskonałej), a w sali nr 2 z 0,63 (zrozumiałość mowy dobra) do 0,80 (zrozumiałość mowy doskonała). Można więc stwierdzić, że przed adaptacją akustyczną sala nr 1 nie spełniała, a sala nr 2 w małym stopniu spełniała kryterium (min. wskaźnik transmisji mowy: 0,62). Po adaptacji akustycznej obie sale spełniają ww. kryteria (zrozumiałość mowy: doskonała). Wnioski: Adaptacja akustyczna sal lekcyjnych umożliwia stworzenie minimalnych wymaganych warunków do uzyskania dobrej zrozumiałości mowy i w sposób pośredni przyczynia się do zmniejszenia nadmiernego wysiłku głosowego nauczycieli. Med. Pr. 2013;64(2):207–215
    Background: Voice organ disorders among teachers are caused by excessive voice strain. One of the measures to reduce this strain is to decrease background noise when teaching. Increasing the acoustic absorption of the room is a technical measure for achieving this aim. The absorption level also improves speech intelligibility rated by the following parameters: room reverberation time and speech transmission index (STI). This article presents the effects of acoustic adaptation of classrooms on the quality of verbal communication, aimed at getting the speech intelligibility at the good or excellent level. Material and Methods: The article lists the criteria for evaluating classrooms in terms of the quality of verbal communication. The parameters were defined, using the measurement methods according to PN-EN ISO 3382-2:2010 and PN-EN 60268-16:2011. Acoustic adaptations were completed in two classrooms. Results: After completing acoustic adaptations the reverberation time for the frequency of 1 kHz was reduced: in room no. 1 from 1.45 s to 0.44 s and in room no. 2 from 1.03 s to 0.37 s (maximum 0.65 s). At the same time, the speech transmission index increased: in room no. 1 from 0.55 (satisfactory speech intelligibility) to 0.75 (speech intelligibility close to excellent); in room no. 2 from 0.63 (good speech intelligibility) to 0.80 (excellent speech intelligibility). Therefore, it can be stated that prior to completing acoustic adaptations room no. 1 did not comply and room no. 2 barely complied with the criterion (speech transmission index of 0.62). After completing acoustic adaptations both rooms meet the requirements. Med Pr 2013;64(2):207–215
    Źródło:
    Medycyna Pracy; 2013, 64, 2; 207-215
    0465-5893
    2353-1339
    Pojawia się w:
    Medycyna Pracy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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