"Listening through different ears in the Sydney Opera House"
SOH recording setup
Binaural head-related impulse response (HRIR) measurements were conducted in the Concert Hall of the Sydney Opera House using a Soundsphere loudspeaker and a customized sub-frequency loudspeaker at 6 x positions on the stage platform marked in letter A, B, C, D, E, F. Measurements were made in 3 seats (N35, P34,Q33) for 7 subjects and 1 acoustic mannequin which was a customized model (ears, head, and torso) see Figure 1 below.
Figure 1: a) Overview of recording setup – 6 loudspeaker positions on the stage platform marked A to F, measured 3 seating: N35 marked in orange circle, P34 marked in red circle and Q33 marked in green.
1. Binaural HRIR
Here, we will present VAS sound simulation for binaural HRIR collected in seat P34 from center stage loudspeaker marked "F".
2 subjects' HRIRs were removed from the data set, leaving a total of 6 binaural HRIRs. Beacuse the primary issue is that a subject may not have been directly facing the centre stage leading to an ‘artificial' ILD and ITD cue than can be used to discriminate between different binaural HRIRs.
Table 1: 6 subjects' recorded binaural HRIR in seat P34.
2. Sound Stimuli
A variety of sound stimuli were chosen ranging from speech, instrumental music, ensemble music, and orchestral music (see Table below). The sound excerpts covered different frequency ranges and textural complexities and were limited to 10-15 seconds in length.
Table 2: 9 mono anechoic excerpts are extracted from two CD archives, ranging from speech, tonal instruments to complex ensemble and orchestral pieces.
3. Binaural VAS stimuli
A total of 54 VAS sound stimuli were generated by convolving the binaural HRIR filters with the 9 mono anechoic sound stimuli described above.
Table 3: 54 binaural VAS sounds generated by convolving 9 mono anechoic sounds with 6 subjects' recorded HRIRs for seat P34.
The correctness of the processing steps described above was verified by comparing the simulated binaural VAS sound stimuli for the Orchestra-Moz. piece with a true binaural recording of the same piece recorded in the same session as when the binaural HRIRs were recorded. This page was produced by Angela Li.