• 음성과학
• /
• 제10권2호
• /
• pp.191-203
• /
• 2003

This study examined the effect of vocal loudness on nasalance measures, under the conditions of three sentence patterns (i.e., Oral sentences, Mixed sentences, Nasal sentences). The vocal loudness level was classified into soft voice (55 dB), medium voice (65 dB) and loud voice (75 dB). The participants in the present study were 30 normal adults (male: female =1:1). Kay's Nasometer 6200 was used to measure nasalance and Sound level meter was used to adjust the loudness level. The results of the present study are as follows. Firstly, the change in vocal loudness is in the following. In the Oral sentence stimuli, the loud voice for both male and female showed the highest nasalance degree, and the medium voice the lowest level. In the Mixed and Nasal sentence stimuli, however, male participants showed the highest degree of nasalance in the soft voice, and the lowest degree in the loud voice, and female showed the highest degree of nasalance in the soft voice and the lowest in the medium voice. Secondly, when each subject's nasalance scores were ranked in a ordered manner, noticeable tendency. Lowest nasalance score occurred in the loud voice and the highest nasalance score was recorded in the soft voice during participants' reading of the Nasal sentences. However, it was hard to find such pattern in the Oral sentences. It is assumed that velopharyngeal function could be related to these findings. Furthermore, the findings associated with vocal loudness may have diagnostic as well as clinical implications.

• 대한후두음성언어의학회지
• /
• 제22권2호
• /
• pp.106-110
• /
• 2011

Western classical singing voices are different from those of pop song singer's singing voices as well as traditional Korean singing such as Pansori. We anlalysed the singing voices from three different categories with using free application programs available at the usual smart phones : sound level meter and Spectral View Analyzer and fiberoptic rhinolaryngoscopic evaluation. The intensity of voice produced by a classical western singer was 11 dB louder than that produced by a pop song singer. Source sound, glottic sound, as well as harmonic sound and singing resonant sound (Singer's formant) are much more prominent. When evaluated under video-rhinolaryngoscopy during singing, the resonance cavity especially oropharyngeal cavity and hypopharyngeal cavity are widely opened during singing of the western classical singer than those of the traditional Korean singer's singing. Difference of singing methods including producing the glottal sound, respiration and resonance are discussed. Possible explanation of development of 'Singer's Formant' is discussed.

• 융합신호처리학회논문지
• /
• 제10권3호
• /
• pp.181-185
• /
• 2009

Recently, much attention to a self-organizing mobile ad-hoc network is escalating along with progressive deployment of wireless networks in our everyday life. Being readily deployable, the MANET (mobile ad hoc network) can find its applications to emergency medical service, customized calling service, group-based communications, and military purposes. In this paper we investigate a time slot exchange problem found in the time slot based MAC, that is designed for IEEE 802.11b interfaces composing a MANET. The paper provides a method to maintain the quality of voice call by providing a new time slot when the channel assigned for that time slot gets noisy with interferences induced from other nodes, which belong to the same and/or other subgroups. In order to assess the performance of the proposed algorithm, a set of simulations using the OPNET modeler has been performed assuming that the IEEE 802.11b interfaces are operating under a modified MAC, which is a time slot based reservation MAC implemented in the PCF part of the superframe. In a real-time voice call service over a MANET of a size 500 ${\times}$ 500 meter squares with the number of nodes up to 100, the simulation results are collected and analyzed with respect to the packet loss rate and packet delay. The results show us that the proposed time slot exchange protocol improves the quality of voice call over that of plain DCF.

• 한국정보처리학회:학술대회논문집
• /
• 한국정보처리학회 2023년도 추계학술발표대회
• /
• pp.994-995
• /
• 2023

일상생활에서도 불편함을 겪는 시각 장애인들을 위해 기초적인 생활을 보완할 수 있는 음성인식 다용도 계량기를 개발하고자 하였다. 본 제품은 API를 통해 저울의 측정값을 한국어 음성으로 변환하여 출력하는 음성 저울과 음성인식을 통해 슬라이드 포트로 정수기를 제어하는 작동 기기로 구성되어 있다. 현재 음성인식 다용도 계량기 개발을 완료했으며, Web, APP 등의 개선 방안을 연구 및 적용하는 중에 있다. 본 계량기를 통하여 시각장애인·시력저하자의 일상생활 및 삶의 질 향상뿐만 아니라 병원 등의 공공시설 개선에도 도움을 줄 수 있을 것으로 기대된다.

• 한국콘텐츠학회논문지
• /
• 제13권4호
• /
• pp.320-330
• /
• 2013

본 연구는 심폐소생술 시 음성측정기를 활용하여 구조자의 간소화된 구령방법과 연속된 구령방법과의 가슴압박 질 비교를 통해 심폐소생술의 효율성을 높이고자 한다. 대상자는 C도 소재 응급구조과 재학생으로 심폐소생술 15주 교육과정을 이수한 89명(실험군 45명, 대조군 44명)을 무작위추출 하여 시행하였다. 집단 구분은 간소화된 구령집단을 실험군, 연속적 구령집단을 대조군으로 하였다. 실험측정 기간은 1차(2011년 11월 10일, 11월 28일)와 2차(2012년 9월3일-9월4일)로 진행하였다. 분석은 SPSS WIN 12.0 program을 사용하였다. 연구결과 적절한 가슴압박(회, %)은 실험군(102.86회, 67.79%)이 대조군(85.31회, 55.84%) 보다 가슴압박 질 효과가 높았다(p<.05). 반면, 약한 가슴압박(회) 시행은 실험군(35.54회) 보다 대조군(61.13회)이 높았다. 성별에 있어서는 실험군의 남자가, 체중에 있어서는 실험군의 60kg이상이 적절한 가슴압박을 보였다(p<.05).

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2002년도 춘계학술대회 논문집
• /
• pp.357-360
• /
• 2002

Nowadays, the improvement and development of Multi-media, information and communication technology are rapidly processed. And many products, for example, digital camera, digital camcorder, and PDA, are used for them. They need large data storage capacity and small size, light storage system. Due to that, many studies and researches in data storage system have been carried out. Especially, micro drive system was presented by IBM.(1) However, its system is expensive and uneasy to be portable. In ODD technologies, 1 inch drive system is not yet or in processing status.(2) If to be possible and to be come up, it is cheap than HDD system and easy to transfer information. In this paper, a miniaturized actuator(about linch) is designed and tested for ODD system. Specially, it is adapted for NFR(Near-field Recoding) system using SIL(Solid Immersion Lens). It is the dual-servo actuator which consists of a coarse actuator and fine actuator. Its actuating force generation method is VCM(Voice Ceil Motor). The fine actuator has 4-wire suspensions and bobbin wrapped by coil and includes focusing motion as well as tracking motion. The coarse actuator has an actuating coil and V-grooved guide mechanism. Also, the characteristics of the designed actuator is estimated by sine-swept mode and LDV(Laser Doppler Vibro-meter).

• 한국정밀공학회지
• /
• 제18권8호
• /
• pp.174-181
• /
• 2001

Nowadays, the improvement and development of Multi-media and information & communication technology is rapidly processed. They need large data storage capacity. So that, many studies and researches in data storage have been carried out. According to them, the data storage capacity has been increased. But the limitation of storage capacity is happened for several problems. One of them is spot & pit size in optical and magnetic data storage and another is the resolution of actuators. The problems in spot & pit size are covered by new data storage methods-- for examples, AFM(Atomic Force Microscopy), MO(Magneto-optical) system, and NFR(Near-Field decoding) system etc. But the resolution limit of an actuator was not developed and doesn\`t follow up the development of spot & pit size. Because of them, we should improve a resolution of an actuator. Especially, in this paper an actuator if studied and designed for NFR (in using SIL(Solid Immersion Lens) system. It is a dual stage actuator, which consists of a Fine actuator and a Coarse actuator. and should desire 100nm accuracy. Its actuating force generation method is VCM(Voice Coil Motor). The Fine actuator is composed of 4-leaf springs and a bobbin wrapped by coil. The Coarse actuator has Coils and 3-Roller bearings. Also, The Characteristics of designed actuator for NFR system is estimated by Sine-Swept mode and LDV(Laser Doppler Vibro-meter).