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Study and Consideration on Symmetrical KEMAR HATS Conforming to IEC60959

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KEMAR is widely recognized as a leading model of head and torso simulators (HATS) for different types of acoustic measurements meeting requirements of a global industrial standard, ANSI S3.36/ASA58-1985 and IEC 60959:1990. One of the KEMAR HATS pinna models has a reputation for good reproducibility of measured results in examining headphones and earphones. However, it requires free filed compensation in order to conduct the measurements; thus, the head-related transfer function (HRTF) of HATS fitted with the pinna model must be corrected. Because headphones and earphones are usually designed symmetrically, we developed a prototype of Symmetrical KEMAR HATS based on the original KEMAR mounted with the pinna model with good reproducibility. We measured and evaluated a set of HRTFs from the sound source to both ears. Our study concluded that the HATS we developed carries symmetrical characteristics and is also suitable to be utilized as a tool to measure the qualities of variety of acoustic devices along with the conventional KEMAR and it can serve as a new common platform for different types of electroacoustic measurements

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