Abstract

Listener envelopment (LEV) in concert halls is a function of both the spatial and temporal properties of the room impulse response (IR). This study used measured spatial IRs that were modified to study which segments of the early and late parts of the IRs contribute the most to the perception of LEV. Measurements were obtained in the Peter Kiewit Concert Hall in Omaha, NE, using an Eigenmike 32-element spherical microphone array, and processed for third-order Ambisonic reproduction over a 30-loudspeaker array. A subset of the IRs were identified with either an exceptionally high or low amount of LEV. These IRs were modified such that some time segments of the IRs were reproduced in full 3D (e.g., the early energy), while other segments were played only through a single loudspeaker in front of the listener (e.g., the late energy). Additional stimuli were generated that contain time portions of both the highly enveloping IRs and the unenveloping IRs. A subjective listening test was conducted in which listeners rated the LEV of the modified IRs convolved with anechoic music. Results will be presented that compare the LEV ratings to objective measurements of the sound fields. [Work supported by NSF Grant 1302741.]

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