An apparatus is described, which is designed to measure head-related transfer functions (HRTFs) for audio applications. A broadband, two-driver loudspeaker is rotated around the subject with continuous movement, and responses are measured with a swept-sine technique. Potential error sources are discussed and quantified, and it is shown, that the responses are almost identical to responses measured with a static, small single-driver loudspeaker. It is also shown that the method can be used to measure a large number of HRTFs in a relatively short time period.
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