• 한국HCI학회:학술대회논문집
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• 2006.02a
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• pp.161-168
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• 2006

본 연구는 공간적 정보의 청각적 제시 가능성을 확인하기 위해 머리전달함수(head-related transfer function: HRTF)를 통해 생성된 3D 사운드를 가상공간상 대상 위치의 직각형태(orthogonal pattern), 혹은 대각형태(diagonal pattern)의 조합으로 배열하여 투시장치(See-Through HMD)로 증강현실을 경험하고 있는 사용자 과제수행의 정확성을 측정하였다. 본 연구에서 실시한 실험들의 결과를 종합하면, 3D 사운드로 대상의 위치 정보를 제시할 때는 사용자로부터의 방향은 직각으로 위치시키는 정보 배열이 정확성을 확보할 수 있고, 또한 가상적 깊이를 이용하여 정보를 배열하는 것도 그 깊이를 구분할 수 있으나 정확성이 떨어짐을 확인하였다. 특히 보다 현실적인 과제 상황에서의 수행을 비교하기 위해 일차과제(primary task)를 하는 동안 제시된 청각자극 조건에서 이런 정확성의 차이가 마찬가지로 나타났다. 이런 결과를 통해 3D 사운드로 대상의 위치와 같은 공간적 정보를 제시 가능한 최적의 배열 형태를 제안하는데, 이는 어떤 패턴으로 정보를 구조화하여 제시하느냐에 따라 청각적 위치 정보 제시의 성공 여부가 결정된다는 것을 의미한다.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2001.05a
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• pp.92-96
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• 2001

제품에 대한 소비자의 평가는 제품이 나타내는 전반적인 특성에 대하여 이루어지며, 이 과정에서 인간의 오감이 모두 작용한다. 최근 대두되기 시작하고 있는 다감각 디자인은 형태와 색상을 중심으로 한 시각 중심의 디자인에 시각분만 아니라 청각과 후각 등의 감각요소를 추가하려는 시도를 하고 있다. 제품 디자인에 다감각을 활용하기 위해서는 복합적인 감각자극과 인간의 감성 사이의 관계가 명확하게 이해되어야 하며, 복합자극 이전에 시각 이외의 단순 감각자극에 의한 감성 변화에 대한 이해가 선행되어야 한다. 본 연구는 음향자극에 대한 감성변화를 평가하는 것을 목적으로 하였으며, 선별된 30개 음향을 대상으로 6쌍의 감성어휘를 이용하여 평가한 결과, 음향이 피실험자의 감성에 변화를 발생시키는 것을 확인하였다. 감성의 변화는 음향의 물리적 속성 분만 아니라 사용자 자신의 개인적, 사회적, 문화적 요인에 의해 차이를 보였으며, 이 결과는 감성의 개인적 속성을 확인시켜 주었다.

• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.1
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• pp.89-94
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• 2021

In this paper, we presented the results of analysis with data obtained through EEG measurements to confirm the effect of musical stimulus when performing mathematical tasks. While the subject was solving a mathematical task, favorite and unfavorite music classified according to the subject's preference were presented as musical stimulus and the tasks were divided into memorization task and procedure task. The data measured in the EEG experiments was divided into theta waves, SMR waves and mid-beta waves which are the frequency bands related to concentration to compare the relative power spectrum values. In our results, in the case of comparing no music with favorite music and no music with unfavorite music, a significant difference was observed in the several channels, and the average difference was shown in the channels F3 and F4 of the frontal lobe. In that channels, the power was found to be greater when the music was presented than the case where there was no music. Depending on the subject's preference, it was confirmed that favorite music showed greater brain activity than unfavorite music.

• Journal of the Health Care and Life Science
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• v.10 no.2
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• pp.393-401
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• 2022

The purpose of this study was to investigate how the virtual reality stimulation of conscious movement affects stress after inducing stress with fear stimulation through virtual reality for university students. The control group (n=26) was to applied visual and auditory of virtual reality, and the experimental group (n=29) was to applied visual, auditory and conscious movement together. As a result, in brain waves, it was confirmed that the experimental group induced relaxation better than the control group, and the stress response was more reduced to be more effective in regressing to baseline value, in heart rate variation, it was confirmed that the experimental group was more concentrated and more flow in virtual reality. Therefore, virtual reality stimulation applying conscious movement is considered to be a comfortable intervention method that can be applied to various stresses.

• Journal of Fisheries and Marine Sciences Education
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• v.12 no.2
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• pp.191-198
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• 2000

An experiment was carried out to obtain the fundamental data on the auditory thresholds of fishes for catching method using audible frequency sound, the auditory thresholds of dusky spinefoot Siganus fuscescens(Houttuyn) were measured in the presence of masking noise in the spectrum level range of 74 - 83dB re $1{\mu}Pa/{\sqrt{Hz}}$ by heartbeat conditioning technique using pure tones coupled with a delayed electric shock. The auditory critical ratios were about 23 - 34dB at measurement frequency range. The ratio increased almost linearly with increasing frequency from 200 to 500Hz. The noise spectrum level at the start of masking was about 61 - 73dB within the measurement frequency range. This suggests that hearing of dusky spinefoot is masked in the natural environment with the noise spectrum level above 70dB. The sound pressure level of which the signal sound of 100Hz is recognized by dusky spinefoot under the white noise of 70dB is above 98dB and the critical ratio of them is above 23dB.

• Korean Journal of Cognitive Science
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• v.20 no.2
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• pp.109-124
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• 2009

When visual and auditory information is presented simultaneously, we perceive visual information dominantly over auditory information. This effect is called the visual dominance effect. This study was to examine the influence of semantic congruence of visual and auditory information on the visual dominance effect. The semantic congruence of visual and auditory information was manipulated. The results showed that the visual dominance effect obtained in error rates was not modulated by semantic congruence, whereas the effect in RT was. It is suggested that this modulation of the influence of semantic congruence on the visual dominance effect would be due to the task type.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.12
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• pp.2349-2356
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• 2008

In this paper, we present the method to effectively extract and classify the EEG caused by only brain activity when a normal subject is in a state of mental activity. We measure the synchronous EEG on the auditory event when a subject who is in a normal state thinks of a specific task, and then shift the baseline and reduce the effect of biological artifacts on the measured EEG. Finally we extract only the mental task signal by averaging method, and then perform the recognition of the extracted mental task signal by computing the AR coefficients. In the experiment, the auditory stimulus is used as an event and the EEG was recorded from the three channel $C_3-A_1$, $C_4-A_2$ and $P_Z-A_1$. After averaging 16 times for each channel output, we extracted the features of specific mental tasks by modeling the output as 12th order AR coefficients. We used total 36th order coefficient as an input parameter of the neural network and measured the training data 50 times per each task. With data not used for training, the rate of task recognition is 34-92 percent on the two tasks, and 38-54 percent on the four tasks.

• Phonetics and Speech Sciences
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• v.13 no.1
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• pp.1-15
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• 2021

The present study investigated the mental representation and processing of an ambiguous word in the bimodal processing system by manipulating the lexical ambiguity of a visually or auditorily presented word. Homonyms (e.g., '물었다') with more than two meanings and control words (e.g., '고통을') with a single meaning were used in the experiments. The lemma frequency of words was manipulated while the relative frequency of multiple meanings of each homonym was balanced. In both experiments using the lexical decision task, a robust frequency effect and a critical interaction of word type by frequency were found. In Experiment 1, spoken homonyms yielded faster latencies relative to control words (i.e., ambiguity advantage) in the low frequency condition, while ambiguity disadvantage was found in the high frequency condition. A similar interactive pattern was found in visually presented homonyms in the subsequent Experiment 2. Taken together, the first key finding is that interdependent lexico-semantic processing can be found both in the visual and auditory processing system, which in turn suggests that semantic processing is not modality dependent, but rather takes place on the basis of general lexical knowledge. The second is that multiple semantic candidates provide facilitative feedback only when the lemma frequency of the word is relatively low.

• The Journal of the Korea Contents Association
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• v.17 no.5
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• pp.491-498
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• 2017

This study is to determine the significant effect of white and pink noise on brain. The brain synchronization has been analyzed under the condition of non-noise, white nose and pink noise(male 10, female 10, mean age $23.3{\pm}2.14$). As a result of analysis, pink noise stimulus, alpha, low beta band, and high beta band were significantly decreased than non-noise and white noise. In addition, these brain response pattern significantly increased at frontal lobe and temporal lobe, and dominated on the right hemisphere. This result is considered to be useful of sound design in driving quality of human life on the basis of neuroscience.

• Journal of Music and Human Behavior
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• v.16 no.1
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• pp.47-72
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• 2019

This study reviewed and analyzed English-written studies using a rhythmic tapping task for motor control of children with autism spectrum disorder (ASD). Inclusion criteria for the participants were children with ASD and typically developing (TD) children. The keywords used for the outcome variables included rhythmic tapping, timed movement, and synchronization. Ten studies were included in the final analysis. The included studies were analyzed in terms of target variables, auditory stimuli, and measurements. A meta-analysis was also conducted to examine how children with ASD performed rhythmic tapping tasks compared to children with TD. In the identified studies, five variables were used: timed movement control, timing reproduction, bimanual coordination, synchronization, and interpersonal synchronization. It was found that rhythmic tapping performance was analyzed in terms of accuracy and precision of the movement and reported as significantly correlated to social skills measures. The meta-analysis results showed that there were no significant differences between the ASD and TD groups in continuing rhythmic movements when the presented auditory stimuli ended, whereas there were significant group differences in their ability to maintain their motor performance consistently and to synchronize with auditory cue or with others. These results support the rhythmic tapping task as an effective measure for not only motor control but also social skills development in children with ASD.