• 말소리와 음성과학
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• 제10권4호
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• pp.147-154
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• 2018

Wet voice quality (WVQ) is a characteristic that appears after swallowing. Although the concept is accepted by many clinicians worldwide, it is nevertheless ambiguous. In this study, we investigated WVQ in patients with swallowing disorders using acoustic analysis. A total of 106 patients diagnosed with penetration-aspiration by the videofluoroscopic swallowing study (VFSS) were recruited. A voice recording of vowel /a/ was conducted before and after the VFSS, and an acoustic analysis was then performed using PRAAT. Voice after VFSS was used for a perceptual judgment and divided into two groups: the Wet group (48 patients) and the Non-wet group (58 patients). At the post-VFSS stage, the two groups displayed significant differences in many acoustic parameters including F0_SD, Jitter, RAP, Shimmer, APQ, HNR, NHR, FUF, DVB, and CPP. The parameter affecting judging wetness resulted into Jitter and NHR by the logistic regression test. At the pre-VFSS stage, the two groups differed significantly in many acoustic parameters including Intensity, Jitter, RAP, Shimmer, NHR, FUF, DVB, and CPP. Both pre-and post-VFSS, the mean values of all significant parameters, except Intensity, HNR, and CPP, were higher in the Wet group. According to pre-and post-VFSS, the two groups displayed interactions in many parameters (Intensity, F0_SD, Jitter, RAP, Shimmer, APQ, HNR, NHR, FUF, DVB, and CPP). In particular, Intensity increased in both groups after the VFSS, although the increase in the Non-wet group was greater. Based on these results, it was conjectured that the WVQ after swallowing resulted from the secretion effect of the mucous membrane due to the dry laryngeal characteristic of elderly patients, rather than aspiration resulting in food on the vocal cords.

• 말소리와 음성과학
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• 제7권1호
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• pp.39-45
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• 2015

Changes in speech production in normal elderly might be subtle and gradual. Therefore, an acoustic analysis is appropriate to identify the effect of aging on speech. For this purpose, this study examined four speech parameters; voice onset time (VOT), VOT range, $f_0$ of following vowel($f_0FV$), and $f_0FV$ difference in two age groups, old (mean age 74.57 yrs.) and young (m: 27.43 yrs.). The results show that compared to the older group the younger demonstrated significantly shorter VOTs in lenis and longer in aspirated stop. VOT ranges were relatively broad and consequently overlapped between the phonation types (e.g., lenis, fortis, aspirated). The $f_0FV$ values in the older group which are an integral parameter with VOT were lower compared with the young group. The $f_0FV$ differences in the old female group were significantly narrower than the young female group, therefore, clear distinction became difficult. In conclusion, contrast in temporal information was obscured, and the domain of glottal information was diminished on stop consonants in Korean elderly. The findings suggest that central/peripheral changes by aging could lead to a deficit in coordination between phonation and articulation.

• 대한음성학회:학술대회논문집
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• 대한음성학회 2005년도 추계 학술대회 발표논문집
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• pp.141-144
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• 2005

The purpose of this study is to identify the acoustic changes according to age and to provide the evaluation criteria of elderly voice. The number of 120 Korean adults (three age groups * two sex groups) proceeded sustained three vowels, read apart of 'Taking a walk' and explained a picture. The data was analyzed acoustically with MDVP of CSL. The results showed that: 1)there was statistically most significant changes in sex and age in F0 than the others but no significant in Shimmer. 2)acoustic parameters were changed from young adulthood to old age. Different patterns of change with aging were observed in men and women.

• 말소리와 음성과학
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• 제11권1호
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• pp.65-66
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• 2019

• 대한후두음성언어의학회지
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• 제25권1호
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• pp.24-26
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• 2014

Aging causes a variety of changes in the structure of the vocal fold (VF), resulting in aging-induced dysphonia (presbyphonia). Several studies have investigated the structure of the VF of elderly people from autopsy as well as animal studies. There is an increasing evidence on correlation of structural changes of VF with deteriorated voice in elderly. Although the cellular mechanisms of aging VF have only partially been elucidated, there are many recent advances in biological treatment on aging VF using bioactive molecules such as growth factors. In this study, I'd like to address aging-related structural, biological, and physiological changes in previous literature about human and rodent aging VFs, to provide further insight into the mechanisms responsible for presbyphonia and to translate the basic researches for future clinical trials.

• 로봇학회논문지
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• 제4권3호
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• pp.177-184
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• 2009

This paper presents an active assisted-living system in wireless sensor and actor network (WSAN) in which the mobile robot roles an actor. In order to provide assisted-living service to the elderly people, position recognition of the sensor node attached on the user and localization of the mobile robot should be performed at the same time. For the purpose, we use received signal strength indication (RSSI) to find the position of the person and ubiquitous sensor nodes including ultrasonic sensor which performs both transmission of sensor information and localization like global positioning system. Active services are moving to the elderly people by detecting activity sensor and visual tracking and voice chatting with remote monitoring system.

• 한국정보통신학회논문지
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• 제24권9호
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• pp.1245-1248
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• 2020

Elderly people living alone need smart care for independent living. Recent advances in artificial intelligence have allowed for easier interaction by a computer-controlled virtual human. This technology can realize services such as medicine intake guide for the elderly living alone. In this paper, we suggest an intelligent virtual human and present our virtual human toolkit for controlling virtual humans for a senior citizen living alone. To make the virtual human motion, we suggest our authoring toolkit to map gestures, emotions, voices of virtual humans. The toolkit configured to create virtual human interactions allows the response of a suitable virtual human with facial expressions, gestures, and voice.

• 대한안전경영과학회지
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• 제19권2호
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• pp.101-106
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• 2017

Purpose The purpose of this study is to investigate the quality of life and stress level of the elderly living alone in their neighborhood volunteers. Methods Data collection was done from July 1 to October 1, 2015 and the data were collected by self-reported questionnaire at Nowon community in Seoul area in South Korea. The subjects were 146 older adults living alone agreed to participate in the study(accepted by IRB). The questionnaire was constructed with quality of life 26 items, 5-point Likert type scale(1-5), stress 15 items, 5-point Likert type. The data were analyzed by descriptive statistics. Results Socially isolated older adults had significantly higher scores ($3.7{\pm}.03$) in quality of life, moderate scores ($2.9{\pm}.03$) in stress. Conclusion The peer support undertaken by older community volunteers was effective in improving quality of life in socially isolated older adults. It is necessary to listen to the voice of elderly people living alone through the activation of volunteer groups in the community.

• Architectural research
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• 제13권3호
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• pp.31-40
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• 2011

Profit-keeping behaviors naturally occur in the market to satisfy consumers, and the logic behind it lies in the economies of scale. On the flip side, some commodities transacted in the market are not available or can not be easily acquired unless the demand is high enough. Under this proposition, some consumers rise and find their own solution to meet the services at a reasonable cost or at an adequate level. The commonly adopted way is to establish a cooperative, and it stirs purchasing power by pooling resources and further bargains price and service quality. As a consumer cooperative, housing cooperatives notably found in rural towns enable the elderly to continue independent living. This study is to take a closer look at residential life of the rural elderly in housing cooperatives. Utilizing in-depth focus group interviews with 40 residents in four housing cooperatives, this qualitative research draws main factors affecting the decision to move in, residential assessment, and strengths and weakness of living in a housing cooperative. The primary factor influencing the moving decision is to continue to independent living in a familiar community, and the bottom line is planning ahead. Frailty and bereavement are found to be the leading occasions for them to move. The participants are satisfied with the independent living arrangement, and particularly, cited such features as safety and security, elderly-friendly design, common spaces, freedom, social activities and efficient living. Also, it is stated that some cooperative natures such as control over the property and giving a voice on management render positive impacts on the satisfaction with communal living. In spite of all the benefits and strengths, participants face with a public notion that an independent living arrangement like a housing cooperative has never done before in rural towns, so that most people recognize it as part of dependent living arrangements like nursing home.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2017년도 춘계학술대회
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• pp.727-729
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• 2017

통계청과 보건복지가족부에 따르면 우리나라는 65세 이상 고령인구 비율이 세계 평균치보다 높게 추정되며 이미'고령화 사회(Ageing Society)'에 접어든 것으로 나타났다. 또한, 예상보다 이른 시기에 정보사회에 도달하여 국민들의 삶의 질이 개선되었을 것으로 추정된다. 그러나 고령층은 젊은 층과 달리 새로운 기계에 선뜻 접근하기 어려워 정보의 접근 및 이용에 있어 뚜렷한 차이를 보이고 있어 세대 간 정보 격차(Digital Divide) 현상을 야기 시키고 있다. 이러한 현상을 해결하기 위해 고령층을 위한 음성인식 기반의 스마트 미러 시스템을 구현하였다. 구현한 시스템은 음성인식을 통하여 조명제어 및 날씨, 지하철 시간 정보 조회 서비스를 제공할 수 있다. 구현한 시스템을 통하여 고령층에게 새로운 기계에 대한 접근 용이성을 제공하여 새로운 시대 변화에 동참하는 느낌을 주고 정보를 얻어 생활이 편리하게 만들어 준다는 효과가 기대된다.