Level-dependent frequency discrimination contradicts a purely temporal pitch code

Evidence

The finding that FDLs depend on stimulus level appear to contradict a purely temporal code, and the lowering of pitch with increasing intensity also poses some problems for a purely temporal interpretation. The degree or rate of phase locking does not depend on intensity; rather it is the synchrony across channels. — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1278

Categorization

• DEFINE: Clarifies what phase locking does and does not track (rate is intensity-independent; synchrony across channels is what varies).