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Wyszukujesz frazę "speech intelligibility" wg kryterium: Temat


Tytuł:
The Influence of the Semantic Material on the Assessment of Speech Reception Threshold
Autorzy:
Krenz, M.
Wicher, A.
Sęk, A.
Tematy:
speech intelligibility
speech test
speech reception threshold
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Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/178107.pdf  Link otwiera się w nowym oknie
Opis:
To determine speech intelligibility using the test suggested by Ozimek et al. (2009), the subject composed sentences with the words presented on a computer screen. However, the number and the type of these words were chosen arbitrarily. The subject was always presented with 18, similarly sounding words. Therefore, the aim of this study was to determine whether the number and the type of alternative words used by Ozimek et al. (2009), had a significant influence on the speech intelligibility. The aim was also to determine an optimal number of alternative words: i.e., the number that did not affect the speech reception threshold (SRT) and not unduly lengthened the duration of the test. The study conducted using a group of 10 subjects with normal hearing showed that an increase in the number of words to choose from 12 to 30 increased the speech intelligibility by about 0.3 dB/6 words. The use of paronyms as alternative words as opposed to random words, leads to an increase in the speech intelligibility by about 0.6 dB, which is equivalent to a decrease in intelligibility by 15 percentage points. Enlarging the number of words to choose from, and switching alternative words to paronyms, led to an increase in response time from approximately 11 to 16 s. It seems that the use of paronyms as alternative words as well as using 12 or 18 words to choose from is the best choice when using the Polish Sentence Test (PST).
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Speech Intelligibility Test for Polish Language – Relation to the Acoustic Properties of Classrooms and Comparison to Other Languages
Autorzy:
Radosz, J.
Tematy:
speech intelligibility
classroom
school
room acoustics
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Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/177319.pdf  Link otwiera się w nowym oknie
Opis:
Numerous studies have shown that teachers often speak louder in classrooms because of the acoustic properties of the spaces. To improve the acoustics in classrooms, it is necessary to develop relevant acoustic criteria. Existing evaluation scales for parameters of room acoustics have been developed on the basis of studies of adults for a variety of languages (e.g. Dutch and English). One of the issues still not fully recognized is the effect of the respondents’ language and age on the results of speech intelligibility tests. The aim of the study was to recognize the possibility of applying some international guidelines for room acoustics developed on the basis of adult studies to classrooms in Polish schools. This paper presents a study of the speech intelligibility of Polish-speaking children (10–13 years old) in conjunction with parameters of room acoustics. It also compares studies of speech intelligibility for other languages. The study confirmed a relationship between the results of speech intelligibility tests and speech transmission index STI for classrooms with varied acoustics. It also showed that the results of Polish word test are similar to results of English tests (Anderson, Kalb, 1987; Jacob et al., 1990).
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.
Tematy:
speech intelligibility
speech intensity
speech-to-noise ratio
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Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/177738.pdf  Link otwiera się w nowym oknie
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
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Logatome and Sentence Recognition Related to Acoustic Parameters of Enclosures
Autorzy:
Kociński, J.
Ozimek, E.
Tematy:
STI
Speech Transmission Index
speech intelligibility
reverberation time
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Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/176289.pdf  Link otwiera się w nowym oknie
Opis:
The paper deals with relationship between speech recognition and objective parameters of enclosures. Six enclosures were chosen: a church, an assembly hall of a music school, two courtrooms of different volumes, a typical auditorium and a university concert hall. Dirac 4.1 software was used to record impulse responses (IRs) in the chosen measurement points of each enclosure. On this base, the following objective parameters of the enclosure were determined: Reverberation Time (RT), Early Decay Time (EDT), Weighted Clarity (C50) and Speech Transmission Index (STI). A convolution of the IRs with logatome tests and the Polish Sentence Test (PST) was made. Logatome recognition and speech reception threshold (SRT – i.e., SNR yielding 50% speech recognition) were evaluated and their dependence on the objective parameters were determined. Generally a linear relationship between logatome or SRT and RT or EDT was found. However, speech recognition was nonlinearly related (according to psychometric function) to STI values. The most sensitive range of the logatome and sentence recognition relative to STI changes corresponded to the middle range of STI values. Below and above this range, logatome and sentence recognition were much less dependent of STI changes.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Speech Intelligibility in Rooms with and without an Induction Loop for Hearing Aid Users
Autorzy:
Kociński, J.
Ozimek, E.
Tematy:
speech intelligibility
induction loop
hearing impairment
speech enhancement
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Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/177905.pdf  Link otwiera się w nowym oknie
Opis:
The paper presents the results of sentence and logatome speech intelligibility measured in rooms with induction loop for hearing aid users. Two rooms with different acoustic parameters were chosen. Twenty two subjects with mild, moderate and severe hearing impairment using hearing aids took part in the experiment. The intelligibility tests composed of sentences or logatomes were presented to the subjects at fixed measurement points of an enclosure. It was shown that a sentence test is more useful tool for speech intelligibility measurements in a room than logatome test. It was also shown that induction loop is very efficient system at improving speech intelligibility. Additionally, the questionnaire data showed that induction loop, apart from improving speech intelligibility, increased a subject’s general satisfaction with speech perception.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of a Single Therapeutic Dose of Methadone on Selected Auditory Functions in Patients Addicted to Opioids and Undergoing Substitution Therapy – a Preliminary Study
Autorzy:
Tarnowska, E.
Wicher, A.
Sęk, A.
Gorzelańczyk, E. J.
Tematy:
methadone
opioids
speech intelligibility
otoacoustic emissions
hearing threshold
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/176565.pdf  Link otwiera się w nowym oknie
Opis:
The main purpose of this research was to determine the influence of a therapeutic dose of an opioid drug (methadone) on selected auditory functions in patients addicted to opioids (recognition ICD-10; F11) and undergoing substitution therapy. Various hearing tests were used in this research – pure tone audiometry, impedance audiometry, otoacoustic emission measurement, and a speech in noise test – in two sessions, before and after methadone intake. It was found that methadone causes an improvement in speech intelligibility when speech is presented in speech-like noise, and slightly decreases hearing thresholds [dB HL]. Methadone consumption has no significant impact on distortion product otoacoustic emissions levels (DPOAE). In summary, a prescribed methadone dose does not worsen the hearing of opioid-dependent subjects.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zaburzenia dyzartryczne w ocenie własnej osób z mózgowym porażeniem dziecięcym
Dysarthric disorders in own evoluation of people with infantile cerebral palsy
Autorzy:
Mirecka, Urszula
Tematy:
dysarthria
infantile cerebral palsy
speech intelligibility
self-evaluated
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Wydawca:
Wydawnictwo Uniwersytetu Śląskiego
Powiązania:
https://bibliotekanauki.pl/articles/667687.pdf  Link otwiera się w nowym oknie
Opis:
The article presents the results of studies conducted in a group of 36 children aged 6–15 years, diagnosed with dysarthria in the infantile cerebral palsy. The experimental group was divided into two equinumerous subgroups: 1) intellectually normal children, 2) mentally retarded children. The main diagnostic technique used in investigations was the Dysarthria Scale. Children’s version. The presented experiments concern one of the problems examined as part of the project “Segmental and Suprasegmental Specificity of the Phonic Sequence and the Intelligibility of Utterances in Dysarthria Cases in Infantile Cerebral Palsy”. The study financed from science-targeted funds in 2010–2012 as a research project.
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.
Tematy:
acoustic comfort
open-space banks
speech intelligibility
noise annoyance
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/176406.pdf  Link otwiera się w nowym oknie
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.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on Chinese Speech Intelligibility Under Different Low-Frequency Characteristics of Reverberation Time Using a Hybrid Method
Autorzy:
Huang, Wuqiong
Peng, Jianxin
Xie, Tinghui
Tematy:
low frequency
speech intelligibility
classroom
finite-difference time-domain method
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Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:
https://bibliotekanauki.pl/articles/31339871.pdf  Link otwiera się w nowym oknie
Opis:
Reverberation time (RT) is an important indicator of room acoustics, however, most studies focus on the mid-high frequency RT, and less on the low-frequency RT. In this paper, a hybrid approach based on geometric and wave methods was proposed to build a more accurate and wide frequency-band room acoustic impulse response. This hybrid method utilized the finite-difference time-domain (FDTD) method modeling at low frequencies and the Odeon simulation at mid-high frequencies, which was investigated in a university classroom. The influence of the low-frequency RT on speech intelligibility was explored. For the low-frequency part, different impedance boundary conditions were employed and the effectiveness of the hybrid method has also been verified. From the results of objective acoustical parameters and subjective listening experiments, the smaller the low-frequency RT was, the higher the Chinese speech intelligibility score was. The syllables, consonants, vowels, and the syllable order also had significant effects on the intelligibility score.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Two Types of Combined Measures, STI and U50, for Predicting Speech Intelligibility in Classrooms
Autorzy:
Choi, Y.-J.
Tematy:
speech intelligibility
speech transmission index
useful-to-detrimental sound ratios
classrooms
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/176560.pdf  Link otwiera się w nowym oknie
Opis:
The present study reports on the speech intelligibility as measured by speech transmission index (STI) and useful-to-detrimental sound ratios (U50) in university classrooms. Acoustic measurements were made in 12 quietly occupied university classrooms. The measured impulse responses of the classrooms were used to determine the modulation transfer function, m(F), for the STI calculation according to IEC 60268-16. U50 values were determined from both signal-to-noise ratios (SNR) and C50 values. The mean STI and frequency-weighted U50 values for the 12 occupied classrooms were strongly linearly related. The results showed that classrooms with U50 values of about +0.5 dB correspond to STI values of 0.60, indicating ‘good’ acoustical conditions for speech intelligibility. The results illustrate that the U50 measure can be a more practically useful means of assessing and understanding room acoustics conditions for real speech communication in active classrooms.
Dostawca treści:
Biblioteka Nauki
Artykuł

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