• 음성과학
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• 제11권3호
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• pp.175-180
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• 2004

In case of the hearing impairment with tinnitus and increased sound sensitivity, it is known that the patients tend to appeal the psychologically oriented social handicap rather than communication disability. The audiologist who is responsible for such patients in aural rehabilitation should pay special attention to the counseling techniques including tinnitus retain therapy (TRT), ear protector, noise generator, or specific acoustic training based on close cooperation and rapport. And then the audiologist should try to lessen their reaction to the tinnitus by using a hearing aid. This therapies tries to focus not a. total approach but a treatment to lessen the severity of tinnitus. This paper as a case report that a unilateral sharply slopped sensorineural hearing impaired person with tinnitus and increased sound sensitivity by using four channel digital signal processing (DSP) hearing aid with programming increment at low level (PILL).

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2023년도 추계학술발표대회
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• pp.605-607
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• 2023

Recent research has highlighted the effectiveness of Deep Learning (DL) techniques in automating the detection of lung sound anomalies. However, the available lung sound datasets often suffer from limitations in both size and balance, prompting DL methods to employ data preprocessing such as augmentation and transfer learning techniques. These strategies, while valuable, contribute to the increased complexity of DL models and necessitate substantial training memory. In this study, we proposed a streamlined and lightweight DL method but effectively detects lung sound anomalies from small and imbalanced dataset. The utilization of 1D dilated convolutional neural networks enhances sensitivity to lung sound anomalies by efficiently capturing deep temporal features and small variations. We conducted a comprehensive evaluation of the ICBHI dataset and achieved a notable improvement over state-of-the-art results, increasing the average score of sensitivity and specificity metrics by 2.7%.

• 대한간호학회지
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• 제19권2호
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• pp.135-146
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• 1989

This study was undertaken to assess the effect of sound stress on humoral and cellular immune responses to thymus-dependent and independent antigens in mice. After mice were exposed to 4 hr daily sound stessors(83㏈) for 4 days before or after immunization, the primary and / or secondary immune response to sheep red blood cells(SRBC), polyvinylpyrroridone(PVP) or picry1 chloride(TNCB) were assayed. When mice were exposed to sound stressor before or after immunization, delayed-type hypersensitivity reaction and contact sensitivity to TNCB was remarkably depressed compared with those of the unstressed control mice. However, the primary and secondary hemagglutinin response of the stresed mice to SRBC showed a pronounced increase compared with that of the unstressed mice, In contrast to antibody response to SRBC, the primary antibody response of the stressed mic to PVP was almost not detected. surprisingly, the secondary antibody response to PVP of the mice receiving the secondary sound stress was markedly increased when the immune-depressed mice received the secondary immunization with PVP at 46 days after the primary immunization. The susceptibility of mice to intraven-oulsy infected Candida albicans was not changed by the sound stress.

• 한국음향학회지
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• 제37권6호
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• pp.428-436
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• 2018

소음에 대한 반응은 응답자의 소음 민감도에 따라 차이가 발생될 수 있다. 본 연구에서는 소음 민감도와 함께 층간소음에 대한 거슬림, 생활방해, 이웃에 대한 의견 등을 조사하였다. 설문조사 응답자를 소음 민감도 그룹별로 구분하고 소음 민감도 그룹별 층간소음의 거슬림, 생활방해 등에 대하여 비교하였다. 이를 통해 소음 민감도 설문조사 방법을 제시하였다. 설문조사는 서울, 경기 지역 공동주택 거주경험자 233명을 대상으로 층간소음에 의한 거슬림, 생활방해와 소음 민감도, 이웃에 대한 의견과 층간소음 발생 시 항의 방법에 대하여 조사하였다. 설문조사 결과 민감도 그룹을 3개로 나눈 경우 소음 민감도가 높은 그룹의 층간소음 거슬림과 생활방해 반응이 나머지 그룹과 유의한 차이가 있는 것으로 나타났다. 이웃에 대한 느낌 조사 결과 연령대가 증가함에 따라 이웃에 대한 긍정적 반응이 증가되는 것으로 조사되었다. 또한 이웃에 대해 긍정적 느낌을 갖는 그룹의 층간소음 거슬림, 생활방해 인식도 낮은 것으로 나타났다.

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2008년도 추계학술대회
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• pp.54-57
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• 2008

This study is aimed to inspect how the different sensitivities in Behavioral activation system (BAS) and Behavioral inhibition system (BIS) modulate on the properties of physiological responses stimulated by positive or negative affective sound. We measured the electroencephalogram (EEG) of 32 students, consisted of four groups depending on the BAS and BIS sensitivities, during listening to meditation music or noise. The EEG was recorded at Fp1 and Fp2 sites. After listening to music or noise, subjects reported the affect induced by the sound. For EEG, the power in the alpha band at Fp2, especially in the alpha-2 band (9.0-11.0 Hz) increased during the subjects listening to music, while the power at Fp1 increased during noise. During listening to meditation music, there is a tendency that the left-sided activation in prefrontal cortex (PFC) is positively correlated with the difference of BAS(Z)-BIS(Z). During listening to noise, there is a tendency that the right-sided activation in PFC is dominant in case any of the sensitivity of BAS or BIS is high. From these results we suggest that the physiological responses of different individuals in BAS and BIS react differently under the same emotionally provocative challenge.

• 한국음향학회지
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• 제13권5호
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• pp.40-50
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• 1994

본 논문에서는 3차원 음향 인텐시티 프로브의 고주파 영역에서 발생하는 감도 저하 현상을 보정하는 방법에 대해 연구하였다. 고주파 영역에서 측정오차는 음향 인텐시티 프로브를 구성하는 마이크로폰으로 수음한 신호들의 위상차로 인하여 발생한다. 이 오차는 마이크로폰 사이의 간격보다 측정대상 음향신호의 파장일 작을 경우, 즉 신호의 주파수가 높을수록 크게 발생한다. 이 연구에서는 두개의 마이크로폰으로 구성된 1차원 프로브의 보정법들을 제안하여 그 유효성을 컴퓨터 수치계산으로 검토하였다. 음향 인텐시티 프로브를 구성하는 마이크로폰 사이의 위상차를 음원의 추정된 방향으로 보정하는 방법이 가장 유용하였으며, 이를 3차원 프로브에 적용하여 임의의 방향으로 전파하는 음원에 대해 컴퓨터 수치계산으로 검증하였다. 그 결과, 4개의 마이크로폰을 60mm 간격으로 구성한 3차원 프로브로 1dB 이하의 정밀한 측정이 가능한 주파수 범위가 약 1.2kHz 이였던 것을 제안한 보정방법을 적용한 후, 약 2.8kHz까지 감도가 향상됨이 확인되어 제안한 보정법의 유효성이 증명되었다.

• 한국수산과학회지
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• 제35권6호
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• pp.563-567
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• 2002

Developing base data on luring fish schools into netting position by the use of underwater audible sound on japanese parrot fish Oplegnathus fasciatus found in the coastal waters of Jeju Island, S. Korea. Auditory threshold was determined by the heartbeat condition technique using pure tones coupled with a delayed electric shock. The audible range of japanese parrot fish extended from 80 Hz to 500 Hz with a peak sensitivity at 200 Hz. The mean auditory thresholds at the frequencies of 80 Hz, 100 Hz, 200 Hz,300 Hz and 500 Hz were 104 dB, 95 dB, 91 dB, 99 dB and 113 dB, respectively. As the frequency became higher than 200 Hz, the auditory threshold increased almost linearly with increasing frequency. Critical ratios of fishes measured in the presence of masking noise in the spectrum level range of 69$\~$78 dB (0 dB re 1$\mu$Pa/$\sqrt{Hz}$) ranged from 21 dB to 40 dB at test frequencies. The noise spectrum level at the start of masking was about 70 dB within the test frequency range. The sound pressure level of 100$\~$200 Hz recognized by japanese parrot fish under the ambient noise is above 91 dB and the critical ratio for them is above 21 dB.

• 수산해양기술연구
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• 제47권3호
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• pp.234-240
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• 2011

In order to obtain the fundamental data about the behavior of sharks by underwater audible sound, this experiment was carried out to investigate the auditory characteristics of tiger shark Scyliorhinus torazame which was caught in the coast of Jeju Island by heart rate conditioning method using pure tones coupled with a delayed electric shock. The audible range of tiger shark extended from 80Hz to 300Hz with a peak sensitivity at 80Hz including less sensitivity at 300Hz. The mean auditory thresholds of tiger shark at the frequencies of 80Hz, 100Hz, 200Hz and 300Hz were 90dB, 103dB, 94dB and 115dB, respectively. The positive response of tiger shark was not evident after the sound projection of over 300Hz. At the results, the sensitive frequency range of tiger shark is narrower than that of fish that has swim bladder. In addition, it is assumed that the most sensitive frequency in auditory thresholds of Chondrichthyes is lower than that of Osteichthyes. Critical ratios of tiger shark measured in the presence of masking noise in the spectrum level range of about 60-70dB (0dB re $1{\mu}Pa/\sqrt{Hz}$) increased from minimum 27dB to maximum 39dB at test frequencies of 80-200Hz. The noise spectrum level at the start of masking was distributed at the range of about 65dB within 80-200Hz.

• 수산해양기술연구
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• 제48권4호
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• pp.479-486
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• 2012

In order to obtain the fundamental data about the behavior of conger by underwater audible sound, this experiment was carried out to investigate the hearing ability of Conger eel Conger myriaster which was in the coast of Jeju Island by heartbeat conditioning method using pure tones coupled with a delayed electric shock. The audible range of conger eel extended from 50Hz to 300Hz with a peak sensitivity at 80Hz including less sensitivity over 200Hz. The mean auditory thresholds of conger eel at the frequencies of 50Hz, 80Hz, 100Hz, 200Hz and 300Hz were 105dB, 92dB, 96dB, 128dB and 140dB, respectively. The positive response of conger eel was not evident after the sound projection of over 200Hz. At the results, the sensitive frequency range of conger eel is narrow in spite of swim bladder. Auditory masking was determined for Conger eel by using masking stimuli with the spectrum level range of about 60~70dB (0dB re $1{\mu}Pa/\sqrt{Hz}$). According to white noise level, the auditory thresholds increased as compared with thresholds in a quiet background noise including critical ratio at 68dB of white noise from minimum 26dB to maximum 30dB at test frequencies of 80Hz and 100Hz. The noise spectrum level at the start of masking was distributed at the range of about 68dB within 80~100Hz.

• 수산해양기술연구
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• 제35권2호
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• pp.156-160
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• 1999

제주 연안역에 있어서 해양목장의 음향순치 대상 어종으로 선정할 수 있는 연안 정착성 어류인 쏨뱅이의 청각 능력을 파악할 목적으로, 임의의 순음과 전기자극을 이용하여 육상수조에서 조건 학습시킨 후, 주파수와 음압을 임의로 변화시켜가면서 쏨뱅이의 심전도를 도출하여 심박간격의 변화로부터 청각 문턱치 곡선을 구한 결과, 쏨뱅이는 실험에서 사용한 측정 주파수 80Hz～800Hz의 순음을 인식하고 있었다. 각 주파수에 대한 청각감도는 주파수 80Hz～200Hz에서는 민감하게 나타났으나, 주파수 500Hz 이상에서는 감도가 급격히 나빠지고 있었다. 청각 문턱치는 주파수 100Hz에서 약 90㏈ 의 음압으로 최소였으며, 주파수 300Hz 이상에서 급격하게 상승하는 경향을 보이면서 주파수 500Hz에서 약 127㏈의 음압으로 최고치를 나타내었다.