This paper proposes a method for the fast measurement of loudspeaker impulse responses for all azimuthal di-rections using the continuous measurement method with a turntable. The loudspeaker radiates all azimuthal directions with a constant angular velocity as the turntable rotates, and a measuring microphone records the re-lated radiation sound. In our continuous measurement method, we use a maximum length sequence (MLS) as the excitation signal, record the received signal using a measuring microphone placed in the anechoic room away from the target loudspeaker, and feed them, along with the MLS signal, into a PC so that impulse response can be extracted for all azimuthal directions. This paper describes the concept of the method. Further, some results of the proposed method are veri?ed using physical realization and empirical measurements.

Authors: Kawahara, Kazuhiko; Iwata, Mizuki; Tachibana, Miyato; Nakaie, Ryo
Affiliations: Kyushu University; Kyushu University; TOA Corporation; TOA Corporation(See document for exact affiliation information.)
Express Paper 142; AES Convention 155; October 2023
Publication Date: October 25, 2023 Import into BibTeX
Subject: Perception
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=22296

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