Comparison of transfer functions between the actual pinna and the simple pinna model which is composed of a rectangular plate and three rectangular cavities

• Published in: The Journal of the Acoustical Society of America Vol. 131; no. 4_Supplement; p. 3304
• Main Authors: Ishii, Yohji, Takemoto, Hironori, Iida, Kazuhiro
• Format: Journal Article
• Language: English; Japanese
• Published: Acoustical Society of America (ASA) 01.04.2012
• ISSN: 0001-4966; 1520-8524
• DOI: 10.1121/1.4708354

A simple pinna model which is composed of a rectangular plate with three rectangular cavities (three-step model) has been proposed (Takemoto et al., 2010). The results of numerical simulations using FDTD method showed that the three-step model generates typical peak-notch pattern of HRTFs. However, it is not clear whether transfer functions similar to the subject's HRTFs are generated by the three-step model when the size of each part of the model is adjusted to that of the subject's pinna. Since the 1st and 2nd notches (N1, N2) and the 1st peak (P1) in HRTFs are known as the spectral cues for the front-back and the vertical localization (Iida et al., 2007), it is important that the frequencies of these notches of the pinna model agree to those of the actual HRTFs. In the present study, various three-step models whose sizes are adjusted to those of the subject's pinna are created, and the transfer functions are measured. The results show that the frequencies of N1, N2, and P1 for several models are almost same as those of the subject's HRTFs. A part of this work is supported in part by Grant-in-Aid for Scientific Research (A) 22241040.