This page contains data available for online download about the compact spherical loudspeaker array (CSLA) built for SPRAL by Matthew Neal as a part of his dissertation. All of the data can be downloaded by clicking the link here.

All of these data include:

• The linear-phase FIR one-third octave band filters used as the basis for the CSLA directivity control filters. These are available as a .wav file or as a .mat file for use in the MATLAB environment.
• The driver equalization filters generated by inverting the on-axis response of each array element, measured after final mounting in the CSLA enclosure with all other drivers electrically short-circuited.
• The measured turntable transfer function data for the CSLA operating in 12 different instrument operating conditions. The measurements were performed in an anechoic chamber with 10º resolution in azimuth and 5º resolution in elevation. These data are saved as complex frequency transfer functions up to the Nyquist frequency.
• Simulations of turntable-style measurements for each driver in the CSLA separately. Simulation results from each driver can be processed for directional control and superimposed to simulate any directional radiation condition. Results are saved for both the spherically baffled cap model and for the spherically baffled point-source model. In each .sofa file, receivers are in 10º resolution in azimuth and 5º resolution in elevation. In addition, each driver is saved as a separate emitter in the .sofa file. The GeneralFIRE SOFA convention was used, which allowed for all driver simulations to be contained in a single .sofa file as impulse response data.