Table 1 The listening experiments test conditions
| Test | 1 | 2 | 3 | 4 | 5 | |
|---|---|---|---|---|---|---|
| Truncation | Sparsity | Truncation vs. sparsity | Truncation vs. sparsity | Truncation vs. sparsity | ||
| \(\widetilde {N}=10\) | \(\widetilde {N}=4\) | \(\widetilde {N}=2\) | ||||
| Condition \((Q,\widetilde {N})\) | Reference | (2030,27) | (2030,27) | (2030,27) | (2030,27) | (2030,27) |
| Condition 1 | (2030,10) | (240,10) | (2030,10) | (2030,4) | (2030,2) | |
| Condition 2 | (2030,4) | (25,4) | (240,10) | (25,4) | (12,2) | |
| Condition 3 | (2030,2) | (12,2) |