| Autor: |
Neal MT; Department of Otolaryngology and Communicative Disorders, The University of Louisville, 117 East Kentucky Street, Louisville, Kentucky 40203, USA., Zahorik P; Department of Otolaryngology and Communicative Disorders, The University of Louisville, 117 East Kentucky Street, Louisville, Kentucky 40203, USA. |
| Jazyk: |
angličtina |
| Zdroj: |
The Journal of the Acoustical Society of America [J Acoust Soc Am] 2022 Jun; Vol. 151 (6), pp. 3729. |
| DOI: |
10.1121/10.0011588 |
| Abstrakt: |
Known errors exist in loudspeaker array processing techniques, often degrading source localization and timbre. The goal of the present study was to use virtual loudspeaker arrays to investigate how treatment of the interaural time delay (ITD) cue from each loudspeaker impacts these errors. Virtual loudspeaker arrays rendered over headphones using head-related impulse responses (HRIRs) allow flexible control of array size. Here, three HRIR delay treatment strategies were evaluated using minimum-phase loudspeaker HRIRs: reapplying the original HRIR delays, applying the relative ITD to the contralateral ear, or separately applying the HRIR delays prior to virtual array processing. Seven array sizes were simulated, and panning techniques were used to estimate HRIRs from 3000 directions using higher-order Ambisonics, vector-base amplitude panning, and the closest loudspeaker technique. Compared to a traditional, physical array, the prior HRIR delay treatment strategy produced similar errors with a 95% reduction in the required array size. When compared to direct spherical harmonic (SH) fitting of head-related transfer functions (HRTFs), the prior delays strategy reduced errors in reconstruction accuracy of timbral and directional psychoacoustic cues. This result suggests that delay optimization can greatly reduce the number of virtual loudspeakers required for accurate rendering of acoustic scenes without SH-based HRTF representation. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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