Name
Abstract | ||
|---|---|---|
This paper is concerned with an acoustical phenomenon called sweeping echo, which manifests itself in a room impulse response as a distinctive, continuous pitch increase. In this paper, it is shown that sweeping echoes are present (although to greatly varying degrees) in all perfectly rectangular rooms. The theoretical analysis is based on the rigid-wall image solution of the wave equation. Sweeping echoes are found to be caused by the orderly time-alignment of high-order reflections arriving from directions close to the three axial directions. While sweeping echoes have been previously observed in real rooms with a geometry very similar to the rectangular model (e.g., a squash court), they are not perceived in commonly encountered rooms. Room acoustic simulators such as the image method (IM) and finite difference time-domain (FDTD) correctly predict the presence of this phenomenon, which means that rectangular geometries should be used with caution when the objective is to model commonly encountered rooms. Small out-of-square asymmetries in the room geometry are shown to reduce the phenomenon significantly. Randomization of the image sources' position is shown to remove sweeping echoes without the need to model an asymmetrical geometry explicitly. Finally, the performance of three speech and audio processing algorithms is shown to be sensitive to strong sweeping echoes, thus highlighting the need to avoid their occurrence. |
Year | DOI | Venue |
|---|---|---|
2015 | 10.1109/TASLP.2015.2405476 | IEEE/ACM Transactions on Audio, Speech and Language Processing (TASLP) |
Keywords | Field | DocType |
acoustic signal processing,finite difference time-domain analysis,finite difference time-domain,rectangular geometries,rigid-wall image solution,room acoustic simulations,room impulse response,small out-of-square asymmetries,wave equation,acoustics,acoustic propagation,computer simulation,finite difference methods,image method,room acoustics,finite difference time domain,materials,speech processing,geometry,speech,mathematical model | Impulse response,Squash court,Computer science,Finite difference,Speech recognition,Finite-difference time-domain method,Finite difference method,Wave equation,Room acoustics,Acoustics,Audio signal processing | Journal |
Volume | Issue | ISSN |
23 | 4 | 2329-9290 |
Citations | PageRank | References |
11 | 0.62 | 5 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Enzo De Sena | 1 | 77 | 9.94 |
| Niccolo Antonello | 2 | 17 | 2.12 |
| Marc Moonen | 3 | 3673 | 326.91 |
| Toon van Waterschoot | 4 | 157 | 14.29 |