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Thursday, October 28 • 9:00pm - Friday, December 3 • 6:00pm
Perceptual evaluation of a new, portable three-dimensional recording technique: ``W-Ambisonics''

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In order to exploit strengths and avoid weaknesses of the First Order Ambisonics (FOA) microphone technique, we devised a new, portable 3D microphone recording technique (``W-Ambisonics''). This new technique incorporates a stereo cardioid microphone pair (for frontal information) with two FOA microphone arrays (for lateral, rear, and height information). The design focus of this technique was ``accessibility'' in the recording stage and ``scalability'' in the reproduction stage. Our proposed portable 3D recording technique enables audio reproduction over multiple configurations including immersive platforms.
First, we evaluated lateral localization of the proposed method compared with a conventional 5-channel surround microphone technique. Second, we devised a new binauralization method utilizing two interaural-distant FOA microphone arrays for headphone-based reproduction. Each FOA microphone array renders precise spherical harmonics at each ear position. Lastly, we made a solo piano recording using 5-channel surround technique, 7-channel immersive technique (5-channel plus two height channels), and the ``W-Ambisonic'' array, and subsequently conducted subjective listening evaluations of the sound qualities of the two techniques. The results of our study show that (1) the ``W-Ambisonics'' method enables improved lateral localization over the conventional spaced array technique; (2) the binauralized headphone translation from the ``W-Ambisonics'' recording provided spacious yet precise sound images in listening evaluations; and (3) the ``W-Ambisonics'' recording produced comparable sound quality to the 7-channel recording technique for immersive experience of the concert hall. The proposed ``W-Ambisonics'' microphone technique is practical, precise, and scalable across multiple reproduction scenarios, from binaural to multichannel systems.

avatar for Dr. Doyuen Ko

Dr. Doyuen Ko

Associate Professor, Belmont University
Dr. Doyuen Ko is an Associate Professor of Audio Engineering Technology at Belmont University in Nashville, Tennessee. He received his Ph.D. and Master of Music from the Sound Recording Department at McGill University, Canada. Before studying at McGill, he has worked as a sound designer... Read More →

Lu Xuan

Rochester Institute of Technology

Sungyoung Kim

Rochester Institute of Technology

Miriam Kolar

Department of Music, Amherst College, Amherst, MA 01002, USA

Thursday October 28, 2021 9:00pm - Friday December 3, 2021 6:00pm EST