Figure 4.

Human behavioral and EFR data (data from Ruggles et al., 2011, 2012) showing large variability in both performance and temporal coding fidelity among NHT participants. (A) Relationship between spatial attention task performance in reverberation and EFR PLV across NHT listeners. Task performance varied from chance levels (30%) to about 70% with a concomitant variation in EFR phase locking. Listeners with good temporal coding of envelopes as measured by the EFR PLV were able to spatially segregate the competing speech streams and performed well. (B) Relationship between spatial attention task performance and frequency modulation (FM) detection thresholds (data from Ruggles et al., 2011), a task known to rely on robust encoding of TFS.