• Speech Sciences
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• v.4 no.2
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• pp.41-54
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• 1998

Speech signals are, depending on the characteristics of waveform, classified as voiced sound, unvoiced sound, and silence. Voiced sound, produced by an air flow generated by the vibration of the vocal cords, is quasi-periodic, while unvoiced sound, produced by a turbulent air flow passed through some constriction in the vocal tract, is noise-like. Silence represents the ambient noise signal during the absence of speech. The need for deciding whether a given segment of a speech waveform should be classified as voiced, unvoiced, or silence has arisen in many speech analysis systems. In this paper, a voiced/unvoiced/silence classification algorithm using spectral change in the wavelet transformed signal is proposed and then, experimental results are demonstrated with our discussions.

• Asian Journal for Public Opinion Research
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• v.10 no.3
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• pp.149-177
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• 2022

This study analyzes how inoculation affects the spiral of silence. Inoculation could be a beneficial tool in a democracy as it elevates citizens' resistance to attitude change "forced" by "the winning opinion" in the spiral of silence on a certain controversial issue. The study examines essential variables combined with the theories of inoculation and spiral of silence, such as resistance to counter-attitudinal attack, fear of isolation, and issue-involvement. A two-wave field experiment was employed to assess the formation of public opinion on Taiwan's political future with the People's Republic of China. Results support that inoculation enhanced people's resistance to attitude change and decreased their fear of isolation. Individuals who are more issue-involved were also shown to be more affected by inoculation, which allowed them to resist attitude change. The decreased fear of isolation, coupled with more issue involvement, might elevate people's willingness to speak out in public. More political discussions regarding an important public issue might be expected in a democracy.

• Journal of Korean Academy of Nursing
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• v.54 no.2
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• pp.279-295
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• 2024

Purpose: This study aimed to develop a scale to measure hospital nurses' silence behavior and examine its validity and reliability. Methods: A total of 52 preliminary items on hospital nurses' silence behavior were selected using a content validity test by seven experts on 53 candidate items derived from a literature review and in-depth interviews with 14 nurses. A total of 405 hospital nurses participated in a psychometric testing. Data analysis comprised item analysis, exploratory and confirmatory factor analyses, and convergent and discriminant validity tests. Pearson's correlation coefficient was used for assessing concurrent validity, and Cronbach's alpha was used for the reliability test. Results: The final scale consisted of nine factors with 31 items, exhibiting acceptable model fit indices, convergent validity, and discriminant validity. The score of the entire scale was positively correlated with the 'Organizational Silence Scale (OSS)-the issues on which nurses remain silent' (r = .60, p < .001) and 'OSS-the reasons why nurses remain silent' (r = .68, p < .001). Cronbach's α of the scale was .92, and α of each subscale ranged from .71 to .90. Conclusion: The Hospital Nurses' Silence Behavior Scale is a useful tool for assessing multifaceted silence behavior among nurses. It can provide basic data for developing better communication strategies among nurses and other hospital staff.

• Journal of the Korean Institute of Telematics and Electronics
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• v.19 no.6
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• pp.84-90
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• 1982

In this paper we exploit the use of the intermittent property of speech to reduce the transmission rate or to increase signal-to-quantization noise ratio (SQNR) in coding speech by hybrid companding data modulation (HCDM). In this scheme we detect silence in speech by a speech/silence discriminator. HCDM coding is done only for speech portion. For silence that is detected in evert block of 5 ms, only the information indicating that the Since the HCDM coder transmits bina교 signal synchronously at a fixed rate, the use of a buffer and its efficient control is essential. By using the HCDM with silence detection in coding speech, we could improve SONR by as much as 6 dB over the conventional HCDM or reduce the transmission rate by one third of the HCDM rate.

• Journal of Digital Convergence
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• v.19 no.6
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• pp.185-198
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• 2021

This study is a study to examine and verify the importance of human resources among the various factors that modern companies need to consider in order to cope with the changing environment. As independent variables, acquiescent and defensive silence were composed of the motives felt by members, and creativity and innovation behavior were set as the outcome variables. Through this research, first, the importance of communication between the members of the organization and the manager is investigated, and it is intended to be managed efficiently. Secondly, we would like to confirm the modulating effect of resilience in the relationship between them, and to find out the importance of psychological recovery of members. In the end, this aims to talk about the importance of psychological management and recovery of members in managing human resources. As a result, acquiescent silence negatively affects creativity and innovation behavior, and defensive silence positively affects creativity and innovation behavior. In addition, in the case of the moderating effect of resilience, there was no significant relationship in both defensive silence, creativity, and innovation behavior, and in the case of acquiescent silence, only innovation behavior was found to be significant. This is the result of the combination of the unique characteristics of resilience and the difference in the disposition of the members who choose resignation silence and defensive silence.

• Journal of the Korea Convergence Society
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• v.7 no.5
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• pp.189-200
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• 2016

This study was done to review and summarize trends in research related to organizational silence, to realize convergent association of relating variables, subjects and to explore directions for future research. 26 research papers related to organizational silence, which were published in Korea between 2006 and 2015, were analyzed. 25 articles was published between 2011 and 2015. 96.2% of the study were descriptive research. The subjects were higher in the order of the police, hotel employees, corporate employees. Measurement instrument developed by Van Dyne, Ang & Botero(2003) were used and modified. Turnover intention were used in 13 studies as dependent variable of organizational silence. The findings of this study suggest that should be performed to identify variables related to organizational silence and to develop measurement instrument of organizational silence in Korea climate.

• Culinary science and hospitality research
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• v.23 no.3
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• pp.123-136
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• 2017

This study aims to understand the influence of employees' perceptions of organizational politics (POP) on organizational silence (OS) and turnover intention (TI) in the foodservice industry and to verify the moderating effects of departments (food & beverage and kitchen) in the relationship among the POP, OS, and TI. Based on a total of 313 useful samples obtained for the empirical research, this study reviewed the reliability and fitness of the research model and verified a total of 2 hypotheses using the AMOS program. The hypothesized relationships in the model were tested simultaneously by using a structural equation model(SEM). The proposed model provided an adequate fit for the data, $x^2=349.889$ (p<0.001), df=100, CMIN/DF=3.499, GFI=0.882, NFI=0.880, CFI=0.911, RMSEA=0.089. The model's fit, as indicated by these indexes, was deemed satisfactory, thus providing a good basis for testing the hypothesized paths. The results of SEM showed that foodservice employees' POP had positive impacts on the defensive silence (DS) and acquiescent silence (AS). In addition, DS and AS had a positive influence on TI. The department (food & beverage and kitchen) was found to have a partial moderating effect in the relationship between POP, OS, and TI. Based on the research findings, we discussed the practical implications and suggestions for the future research.

• Journal of the Korea institute for structural maintenance and inspection
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• v.22 no.5
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• pp.64-71
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• 2018

This paper provides the results for experimental study on longitudinal shear performance for new-concept composite slabs embedded with silence insulator. Longitudinal shear capacity tests are used to predict characteristics of composite action between the concrete block, silence insulator and deckplate. A total set of 7 Push-Down specimens are tested to clarify the composite action between the concrete block, silence insulator and deckplate. Parameters in this study are the width of T-type bar, the depth of reinforced bar and the thickness of silence insulator. The results from experimental study on longitudinal shear capacity for new-concept composite slabs applied T-type bar, Reinforced bar and Silence insulator are summarized as follows. In test result, the Longitudinal Shear Capacity of the new concept specimen is 2 times excellent than basic specimen with safety. It is expected that applying the proposed composite slab detail at the actual site will provide a significant safety factor in structural aspect of the existing composite slab, and greatly contribute to the improvement capacities of resisting vibration and sound.

• The Journal of the Korea Contents Association
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• v.15 no.5
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• pp.507-514
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• 2015

There is an increasing awareness about the abusive supervision(AS) and organizational silence(OS) in organizations and literature about the relation between organizational commitment(OC). But there is a shortage of studies about the abusive supervision and organizational silence in travel service. The purpose of this study is to research reasons of abuse supervision in organizations, its effects, results and applications which can minimize or remove abusive supervision by discussion. In this sense, Questionnaires were delivered 9 travel agencies in Seoul and 241 of them were taken. Questionnaire data was analyzed, and according to the results, some implications were proposed. Abusive supervision affects on organizational silence and organizational commitment of employee in travel agent. Organizational silence ha positive effects on organizational commitment. Organizational silence plays as a role of mediator variable in proposal research model. It is hoped that the present research will encourage future multi-level theoretical and empirical work on abusive supervision.

• Journal of Digital Convergence
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• v.18 no.1
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• pp.169-175
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• 2020

This study is to analyze the relationship between Taeoom(workplace bullying) and organizational performance and to investigate the mediating effects of organizational silence between the relationship among nurses. In order to test the causal and mediating effects, this study employs the mediation analyses with regression. The sample is 273 from A university hospital in Seoul. Based on the results, Taeoom is basically, negatively associated with organizational performance. Acquiescence silence has played a full mediating role in the relationship between Taeoom and organizational performance. That is, Taeoom is not directly associated with organizational performance; however, it has a negative effect on organizational performance through acquiescence silence. Defensive silence plays a partial mediating role in the interdependence relationship. The implications of this study are that the negative effects of Taeoom would increase organizational silence and performance directly and indirectly; therefore, it is necessary to provide institutional prevention of Taeoom.