The CHORDatabase: a twenty-one concert hall spherical microphone and loudspeaker array measurement database

摘要

Repeatability and realism are both highly important goals in concert hall perceptual studies, but it is hard to satisfy both simultaneously. Auralization from room impulse response (RIR) measurements allows for repeatable listening conditions between halls, but typical measurement loudspeakers do not realistically represent an orchestra. To support both goals, the Concert Hall Orchestral Research Database (CHORDatabase) has been generated. This database consists of 32-channel spherical microphone array measurements in 15 North American and 6 European concert halls. First, measurements were made at 7 to 15 seats in each hall using a three-part omnidirectional loudspeaker, maintaining omnidirectionality up to 5 kHz. These measurements enable standard room acoustic parameter calculations and higher-order spherical array beamforming techniques, and the overall variety of the database will be demonstrated using both objective analyses. Also, a compact 20-element spherical loudspeaker array was used to provide realistic source directivities for RIR measurements. This array can accurately represent the frequency-dependent radiation patterns of different instruments up to 3-4 kHz. Measurements were made at 20 orchestral source positions and one seat in each hall. 15 meters from stage. Full-orchestra auralization techniques will be presented, and the future potential of this database will be discussed. [Work supported by NSF Award #1302741.]