Table 4.
Pairwise Comparison of Algorithm Performance.
| Noise | Algorithm | 1 NoPre | 2 ADM | 3 ADM + coh | 4 SCNR | 5 fixed MVDR | 6 adapt MVDR | 7 com PF (fixed MVDR) | 8 com PF (adapt MVDR) |
|---|---|---|---|---|---|---|---|---|---|
| 20T | 2 ADM | 3.5** | |||||||
| 3 ADM + coh | 3.4 | −.1 | |||||||
| 4 SCNR | −.8 | −4.3*** | −4.2** | ||||||
| 5 fixed MVDR | 6.9*** | 3.4* | 3.5 | 7.7*** | |||||
| 6 adapt MVDR | 6.4** | 2.9 | 3.1 | 7.3*** | −.5 | ||||
| 7 com PF (fixed MVDR) | 6.7*** | 3.2* | 3.3* | 7.5*** | −.2 | .2 | |||
| 8 com PF (adapt MVDR) | 6.0*** | 2.5** | 2.6* | 6.8*** | −.9 | −.4 | −.7 | ||
| 9 ind PF (adapt MVDR) | 5.7** | 2.3 | 2.4* | 6.6*** | −1.1 | −.7 | −.9 | −.3 | |
| CAN | 2 ADM | 3.5** | |||||||
| 3 ADM + coh | 3.5* | .0 | |||||||
| 4 SCNR | −1.3 | −4.8** | −4.8*** | ||||||
| 5 fixed MVDR | 5.2*** | 1.7 | 1.7 | 6.5*** | |||||
| 6 adapt MVDR | 5.3** | 1.8 | 1.8 | 6.6* | .1 | ||||
| 7 com PF (fixed MVDR) | 5.0** | 1.6 | 1.6 | 6.4** | −.2 | −.2 | |||
| 8 com PF (adapt MVDR) | 3.3 | −.2 | −.2 | 4.7 | −1.9 | −1.9 | −1.7 | ||
| 9 ind PF (adapt MVDR) | 4.3** | .8 | .8 | 5.6*** | −1.0 | −1.0 | −.8 | .9 | |
| SCT | 2 ADM | 4.6 | |||||||
| 3 ADM + coh | 5.0 | .5 | |||||||
| 4 SCNR | .1 | −4.5 | −5.0 | ||||||
| 5 fixed MVDR | 4.8** | .2 | −.3 | 4.7 | |||||
| 6 adapt MVDR | 15.2*** | 10.6*** | 10.2* | 15.1*** | 10.4** | ||||
| 7 com PF (fixed MVDR) | 6.9** | 2.3 | 1.9 | 6.8* | 2.1 | −8.3** | |||
| 8 com PF (adapt MVDR) | 14.1*** | 9.6*** | 9.1* | 14.1*** | 9.4** | −1.1 | 7.2** | ||
| 9 ind PF (adapt MVDR) | 14.7*** | 10.2** | 9.7 | 14.7*** | 10.0** | −.5 | 7.8* | .6 |
Note. Numbers indicate differences in SRT50 in dB. Positive values correspond to a better performance of the algorithm in the respective row. Statistically significant differences are marked in bold font, asterisks denote level of statistical significance for respective differences. 20T = 20-talker babble; CAN = cafeteria ambient noise; SCT = single competing talker. ADM = adaptive differential microphones; ADM + coh = Adaptive differential microphones in combination with coherence-based noise reduction; SCNR = single-channel noise reduction; MVDR = minimum variance distortionless response; fixed MVDR = fixed binaural MVDR beamformer; adapt MVDR = adaptive binaural MVDR beamformer; com PF (fixed MVDR) = common postfilter based on fixed binaural MVDR beamformer; com PF (adapt MVDR) = common postfilter based on adaptive binaural MVDR beamformer; ind PF (adapt MVDR) = individual postfilter based on adaptive binaural MVDR beamformer.
p < .00003. **p < .00028. *p < .0014.