Sound-source directivity dataset for four loudspekaers

<p>A dataset of sound-source directivity measurements for four different sound sources that can be used in acoustic measurements.&nbsp;</p> <p>The loudspeakers included:</p> <ul> <li>Genelec 8030B studio monitor;</li> <li>Genelec 8331A studio monitor;</li> <li>01 dB LS01 omnidirectional loudspeaker conforming with ISO 3382-1:2009 standard (OmniSource);</li> <li>Mixed-order spherical loudspeaker type 393 (information on design of the loudspeaker is found in the publication: https://www.researchgate.net/publication/333132335_Design_and_Control_of_Mixed-Order_Spherical_Loudspeaker_Arrays). <strong>NOTE:&nbsp;</strong>the orientation of the drivers is specified in the table below.</li> </ul> <table> <tbody> <tr> <td><strong>Elevation (deg.)</strong></td> <td><strong>Azimuth (deg.)</strong></td> <td><strong>Driver #</strong></td> </tr> <tr> <td>0</td> <td>0</td> <td>15</td> </tr> <tr> <td>0&nbsp;</td> <td>-40 (320)</td> <td>11</td> </tr> <tr> <td>0&nbsp;</td> <td>-80 (280)</td> <td>10</td> </tr> <tr> <td>0</td> <td>-120 (240)</td> <td>9</td> </tr> <tr> <td>0</td> <td>-160 (200)</td> <td>8</td> </tr> <tr> <td>0</td> <td>40</td> <td>7</td> </tr> <tr> <td>0</td> <td>80</td> <td>6</td> </tr> <tr> <td>0</td> <td>120&nbsp;</td> <td>5</td> </tr> <tr> <td>0</td> <td>160</td> <td>4</td> </tr> <tr> <td>-45</td> <td>120</td> <td>13</td> </tr> <tr> <td>-45</td> <td>0</td> <td>12</td> </tr> <tr> <td>-45</td> <td>-120 (240)</td> <td>14</td> </tr> <tr> <td>45</td> <td>-60 (300)</td> <td>2</td> </tr> <tr> <td>45</td> <td>60</td> <td>1</td> </tr> <tr> <td>45</td> <td>180</td> <td>3</td> </tr> </tbody> </table> <p>&nbsp;</p> <p>The directivity was measured in the anechoic chamber&nbsp;<em>Lampio&nbsp;</em>at the Acoustics Lab of Aalto University in Espoo, Finland.</p> <p>The measurement microphones were&nbsp; G.R.A.S. 46AF 1/2" free-field microphones and B&amp;K 4191 1/2" free-field microphone. All the receivers were fixed on a custom-made measurement arc. The sound sources were placed ona turntable allowing for high angular resolution in the XY-plane.</p> <p>More information about the measurements is available in the paper:&nbsp;<strong>Anthony Gallien, Karolina Prawda, and Sebastian J. Schlecht, "Matching early reflections of simulated and measured RIRs by applying sound-source directivity filters", in Proc. AES ASR 2024, 22-26 Jan. 2024, Le Mans, France</strong></p> <p>Directivity plots for all sound sources are available online: http://research.spa.aalto.fi/publications/papers/aes-asr24-recreate-RIRs/&nbsp;</p> <p>The work leading to producing the dataset and related research was conducted as Anthony Gallien's intership project at Aalto University Acoustics Lab from May 22 -- August 18, 2023.</p> <p>&nbsp;</p> <h3>How to read this dataset:</h3> <p>The measurements of each sound-source are available as a <strong>Spatially Oriented Format for Acoustics (SOFA)</strong>,&nbsp;AES69-2015 file or as a&nbsp;<strong>set of individual directivity measurements in .wav format</strong> included in a .zip file with the name of a respective sound source.&nbsp;</p> <p>The naming convention for Genelec studio loudspeakers and 01 dB omnidirectional loudspeaker is:</p> <p><strong>Calibrated_IR_elevation_E_azimuth_A.wav</strong></p> <p>The naming convention for the mixed-order loudspeaker is:</p> <p><strong>Calibrated_IR_elevation_E_azimuth_A_driver_D.wav</strong></p> <p><strong>NOTE</strong> that directivity measurements for mixed-order loudspeaker and elevation above 0 degrees are missing due to a loudspeaker-related technical issue during the measurement!</p> <p>&nbsp;</p> <p>The azimuth and elevation angles are determined according to the scheme presented in the file <strong>azimuth_elevation.pdf</strong>.</p> <p>Where elevation is relative to XY-plane at the horizontal axis of the sound source and azimuth is relative to the vertical plane at the vertical axis of the loudspekaer.&nbsp;</p> <p>The elevation angles range from -80 degrees to 90 degrees in 10-degree steps. The azimuth angles range from 0 degrees to 359 degrees in 1-degree steps for Genelec loudspekers and omnidirectional sound source, and in 5-degree steps for the mixed-order loudspeakers. The azimuth angles increase clockwise relative to the axis of the loudspeaker (1 degree azimuth means 1 degree right of the loudspeaker axis, 359 degree azimuth means 1 degree left of the loudspeaker axis).</p> <p>&nbsp;</p> <p>The datset includes a total of 38 880 measurements (6 480 measurements for omnidirectional source and each of the Genelec loudspeakers, 19 440 measurements for the mixed-order loudspeaker).</p>