• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2013년도 하계학술대회
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• pp.58-59
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• 2013

임의의 위치에 음상을 정위하는 기초적인 방법으로, 각각의 고도각과 방위각에서 측정된 머리전달함수를(HRTF : Head Related transfer Function) 원음에 convolution하는 기법이 사용된다. 하지만 더미헤드를 통해 측정된 HRTF는 사용자에 따라 정위감을 저하시킬 수 있다. 또한 좌표로 표현되는 영상과는 달리, 소리는 들려오는 방향을 정확한 좌표로 표현하기가 힘들다. 이에 본 논문은 HRTF를 사용하여 음상을 정위하는 경우의 정위감 개선에 대한 방법을 제안한다. 정위감 개선을 위해 Neville 보간법을 통해 HRTF를 그룹화하는 방법에 대해 연구하였으며, 생성된 HRTF를 음상 정위에 사용하고 청감 평가를 통해 성능을 확인하였다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 추계학술대회논문초록집
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• pp.351.1-351
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• 2002

In this research, the relationship between physical measurements and subjective evaluations of floor impact noise in apartment building was quantified by applying the neural network analysis due to its complex and nonlinear characteristics. The neural network analysis was undertaken by setting up L-value, inverse A index, Zwicker parameters and ACF/IACF factors, as input data, which came from the measurements at real suites of apartment building having various sound insulations. (omitted)

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2000년도 춘계학술대회논문집
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• pp.1741-1746
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• 2000

Recently the impact sound insulation performance is regarded as one of the most important factor in determining the quality of apartment house. So many studies were carried out to improve these performance and to propose an appropriate evaluation method and standard of floor impact sound insulation for apartment house by psycho-acoustic method in the laboratory. This study was carried out the field psycho-acoustic test to find a correlation between physically measured values and psychological response in apartment house, and the results will be used to establish the appropriate evaluation method and standard of floor impact sound insulation.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 춘계학술대회논문집
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• pp.586-591
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• 2002

Recently, the research and discussion to set up the evaluation standard for nor impact noises in multistory residential buildings has been vividly carried out In Korea. Therefore, the correlation between the methods and auditory responses was investigated through this research to investigate the applicability of the L index evaluation method and the reverse A characteristics evaluation method that are listed in JIS A 1419 since Japanese circumstance are similar to Korean after evaluating the duality of Korean multistory residential buildings. As a result, it was found that the correlation between the value resulted from L index evaluation and the value from reverse A characteristics evaluation is high. In addition, it was also revealed that human responses to each Impacter was similar. Consequently, it is considered th:31 the tendency about the two methods would be similar.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 춘계학술대회논문집
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• pp.202-207
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• 2003

The purpose of this study was to investigate the effect of background noise on loudness magnitude estimation of Heavy-weight impact noise. Relationship between loudness magnitude estimation and estimation methods about floor impact noise had appeared low in apartment which receive much effect of background noise. Then, to need new estimation method abut effect of background noise. Masking effects by background noise is increased steadily, there is a continuous transition between an audible impact noise and one that is totally masked. Result 1 hat analyze interrelationship of phychoacoustical data and values through Zwicker Parameters, to Investigate that an estimation experiment about Annoyance need.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2004년도 추계학술대회논문집
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• pp.772-777
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• 2004

Opera house acoustics were subjectively evaluated in order to investigate the effect of performance stage views on the audience's perception of the seat acoustics in an opera house. Nine seats from an existing opera house were selected for the auditory and/or visual experiments according to seating area distribution and acoustical parameters such as RT and $1-IACC_{E3}$. The recorded music, convolved from the impulse response, was presented with and without visual images of the stage. Subjects were asked to assess the auditory/visual descriptors and overall impression of the music at each seat. The results showed that good visual input helps produce a favorable impression of the acoustics, but a limited view degrades acoustical impression. The acoustical parameters in the tested seats were also investigated to find the relationship between the acoustical parameters and the visual/sound impression.

• 한국음향학회지
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• 제19권1호
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• pp.73-77
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• 2000

소음으로 인해 사용자가 느끼게 되는 어노이언스를 정량화하여 표현하고 평가하는 작업은 경제적이고 효율적이며 사용자 중심의 소음조절대책의 수립을 위하여 필수적이다. 바닥충격음의 경우, 정상소음과는 그 동적특성이 달라서 이와 같은 정량화 작업에 있어서 세심한 주의를 요한다. 본 연구에서는, 바닥충격음으로 인해 야기되는 어노이언스의 정량화를 위하여 일련의 청감실험이 시행되었다. 실험결과, 바닥구조체의 특성보다는 충격원의 특성이 사용자가 느끼는 라우드니스와 시끄러움에 보다 큰 영향을 미치는 것으로 나타났으며, 중량충격음이 경량충격음보다 5-6dB 정도 더 크고 시끄럽게 느끼는 것으로 분석되었다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 추계학술대회논문집
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• pp.917-917
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• 2003

The auditory experiments based on the subjective annoyance responses were undertaken for the establishment of the adverb modifiers of the heavy-weight impact noises. The standard heavy weight impact noise, impact ball noise and adult walking noise were recorded by dummy head at a newly-built apartment and were presented to the subjects by headphones. The levels of the three impact noises were varied from 30 to 60㏈(A) and the subjects matched one of the adverb modifiers to each level of the noise sources. As a result, seven scale modifiers were established and the intervals between the modifiers were found as equal. In addition, it was found that the lower annoyance noise limits for the heavyweight impact, impact ball and walking were 40-45㏈ (L$\sub$I, Fmax. AW), which is 6㏈ lower than in the previous study. The background noise level was as low as 21㏈(A) in the test booth, therefore, the testing conditions need to be concerned for evaluation of floor impact noise.

• 한국소음진동공학회논문집
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• 제15권9호
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• pp.1092-1099
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• 2005

This experimental study deals with the characteristics of LCD or PDP TV set noise, which are differ form those of CRT TV set. These characteristics are most important for establishing the effective method to reduce noise level, searching for the appropriate exposure level and evaluation method of LCD or PDP TV set noise. This study adopt two measurement method to specify the power level of LCD or PDP TV set noise in anechoic room(ISO 3741) and reverberation room(ISO 3745) . Comparing with each results of the two method, the reverberation room method is more simple in measuring and calculating the power level. And the subjective response test are carried out to select the pair of appropriate adjectives to present the characteristics of LCD or PDP TV set noise. The pair of 17 adjectives are selected from the 168 adjectives which are used in presenting the sound and noise form literature.

• 한국지능시스템학회논문지
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• 제16권6호
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• pp.671-676
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• 2006

일반적으로 가상 스피커 구현을 위한 음상정위 방법으로 HRTF(Head Related Transfer Function) DB를 원음에 convolution하는 기법을 사용하게 된다. 그러나 비개인화된 HRTF는 가상 스피커 구현에 있어 사용자에 따라 상/하 또는 앞/뒤 방향에 대해서 혼돈을 가져올 수 있어 정위감을 저하시킬 수 있다. 본 논문에서는 상/하, 앞/뒤 정위감을 개선하기 위해 가상 스피커 주변의 HRTF를 그룹화하여 만들어진 새로운 HRTF를 사용한 가상 스피커에 대하여 연구한다. 효과적인 HRTF 그룹화를 위해 필요한 HRTF 개수, 위치 등을 실험을 통해 결정하며, 청감 평가를 수행한다. 생성된 HRTF를 사용한 가상 스피커의 성능 평가 결과, 상/하, 앞/뒤 정위감이 개선됨을 실험을 통해 확인하였다.