서지주요정보
두 귀에 서로 다른 음이 입사되는 상태에서의 라우드니스 모델에 관한 연구 = A study on the loudness model in dichotic conditions
서명 / 저자 두 귀에 서로 다른 음이 입사되는 상태에서의 라우드니스 모델에 관한 연구 = A study on the loudness model in dichotic conditions / 차정호.
발행사항 [대전 : 한국과학기술원, 2003].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8013911

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 03069

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

리뷰정보

초록정보

One of the most important characteristics linked with sound quality and acoustic comfort is the overall perceived loudness. Existing loudness models are applicable only to diotic sounds in spite of the fact that human beings hear dichotic sounds in usual situations. Although binaural recording tools have been developed rapidly and real dichotic signals can be obtained, there are still few dichotic loudness models for the calculation of overall perceived loudness from binaural signals. Traditionally, the mean of loudness values calculated from left and right ear signals has been approximately used for the overall perceived loudness. In this study, the dependence of overall loudness perception on the interaural level differences was investigated by the subjective tests. In the test, subjects should find the diotic signals, of which equally loud dichotic signals are perceivable. In the first test, pure tones with critical band rates of 1, 2.5, 8.5, 14.5, 20.5, 22, and 23 Bark were tested. The larger the interaural level difference, the louder the perception than the mean of calculated loudnesses from left and right ears and the lower the critical band rate, the louder the perception than the mean value. The perception is louder than the mean in the cases that interaural loudness ratios are larger than about 1.2 and critical band rates are lower than about 20.5 Bark. In the second test, five pure tones of 1 kHz having different reference levels of 40, 55, 70, 85, and 100 dB were tested. The larger the interaural level difference, the louder the audible perception than the mean and the lower critical band rate and the louder the perception than the mean value. The perception is louder than the mean in the cases that interaural loudness ratios are larger than about 1.2 and reference levels are lower than about 85 dB. The loudness model was modified appropriately, that the model was applicable to dichotic sounds by using the equivalent diotic levels. The characteristic of the modified loudness model was investigated by the subjective test for the pink noises. It is observed that the loudness values calculated from the present modified model agreed well with the test results. The present dichotic loudness model was applied to several practical dichotic sounds. It is observed that the modified dichotic loudness values are meaningfully different from the mean values in the cases that interaural level differences are relatively large, i.e., hair dryer noises.

서지기타정보

서지기타정보
청구기호 {MME 03069
형태사항 x, 121 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Jeong-Ho Cha
지도교수의 한글표기 : 이정권
지도교수의 영문표기 : Jeong-Guon Ih
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학전공,
서지주기 참고문헌 : p. 120-121
주제 라우드니스
다이코틱
바이노럴
loudness
dichotic
binaural
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