The Journal of the Acoustical Society of Korea (한국음향학회지)

The Acoustical Society of Korea (한국음향학회)
권호 표지
DOI QR코드

DOI QR Code

Comparison of the acoustical performance of auditoria by shapes using acoustic simulation and listening tests

시뮬레이션과 청감실험을 통한 공연장 형태별 음향성능 비교분석

  • Received : 2023.01.12
  • Accepted : 2023.05.15
  • Published : 2023.05.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, the acoustic performance was analyzed by architectural shapes of the hall. There are four architectural shapes of halls. They are rectangular, horseshoe, surround, and fan-shape. Eight acoustic parameters were used to determine the acoustic performance. These are RT60, EDT, C80, BQI, LF, Gmid, G125 and ITDG. First, measurement data of famous concert halls around the world were analyzed. The correlation coefficient R was obtained by regression analysis of the relationship between the subjective ranking of the halls and the acoustic parameters. It was found that BQI, G, and ITDG have higher correlation coefficients R. Also the average of acoustic parameters for each architectural shape were obtained. The total acoustic performance for each shape was calculated by using the correlation coefficient R as a weight for each acoustic parameters. As a result, rectangular halls and horseshoe halls showed good acoustical performances. Second, 3D models of each architectural shape were created and acoustic simulation had been performed. The simulation was performed by creating 3D models of each four shapes of concert halls with the same volume and sound absorption coefficient. Listening test was carried out using the sound source which is created from impulse responses of 3D model. As a result, rectangular hall and horseshoe hall showed the best performance however surround hall and fan-shaped hall showed relatively poor performance.

본연구에서는 홀의 건축형태에 따른 음향성능을 분석하였다. 홀에는 4가지 건축 형태가 있다. 장방형, 말발굽형, 서라운드형(Surround), 부채꼴형이다. 음향성능을 분석하는데 RT60, EDT, C80, BQI, LF, Gmid, G125, ITDG 총 8개의 음향인자를 사용하였으며 건축형태에 따른 음향성능을 연구하기 위해 두 가지 접근 방식을 사용하였다. 첫째 전세계 유명 콘서트홀의 측정 데이터를 분석하였다. 설문조사로 조사한 홀의 주관적 선호도와 측정된 음향 인자 사이의 관계를 회귀 분석해 상관계수 R을 얻었으며 각 공연장 형태별 음향인자 측정데이터 평균을 구하였다. 각각의 음향 인자에 대한 가중치로 상관계수 R을 사용해 각 형태별 음향 성능을 계산하였다. 그 결과 장방형 홀과 말밥굽형 홀이 좋은 음향 성능을 보였으나 부채꼴형 홀의 음향성능은 좋지 않았다. 둘째, 각 건축형태별 3D 모델을 만들어 음향 시뮬레이션을 수행했다. 동일한 체적과 흡음계수를 가지는 장방형, 말밥굽형, 서라운드형, 부채꼴형 3D 모델을 만들어 시뮬레이션을 진행해 음향인자 값을 산출하였다. 또한 형태별 3D 모델의 임펄스 응답을 사용해 가청화 시제를 만들어 청감실험을 진행하였다. 그 결과 장방형 홀과 말굽 홀이 가장 좋은 음향성능을 나타냈으며 서라운드형과 부채꼴형은 상대적으로 떨어지는 음향성능을 나타내었다.

Keywords

References

  1. T. Somerville and C. L. S. Gilford, "Acoustic of large orchestral studios and concert halls," J. Audio Eng. Soc. 7, 160-172 (1959).
  2. M. Barron, "Subjective study of british symphony concert halls," Acta Acust united Ac. 66, 1-14 (1988).
  3. J. S. Bradley, "Contemporary approaches to evaluating auditorium acoustics," Proc. AES 8th International Conf. 59-69 (1990).
  4. L. Beranek, Concert Halls and Opera Houses; Music, Acoustics, and Architecture (Springer, Berlin, 2003), pp. 492-552.
  5. C. H. Haan, Geometry as a measure of the acoustic quality of auditoria, (Ph.D. thesis, Sydney University, 1993).
  6. A. Artasanchez and P. Joshi, Artificial Intelligence with Python (Hanbit Media, Seoul, 2021), pp. 113.
  7. M. Barron, "Subjective study of british symphony concert halls," Acta Acust united Ac. 66, 3 (1988).
  8. J. S. Bradley, "Contemporary approaches to evaluating auditorium acoustics," Proc. AES 8th International Conf. 66 (1990).
  9. L. L. Bernek, "Music, Acoustics and Architecture," American Academy of Arts & Sciences, Stated Meeting Rep., 1992.
  10. L. Beranek, Concert Halls and Opera Houses; Music, Acoustics, and Architecture (Springer, Berlin, 2003), pp. 29.