Alone each acoustic factor mildly degrades periodicity coding but combined they nearly abolish it.

Evidence

There is a small reduction in template contrast due to reverberation alone (Fig. 3a , b ), and a similar small reduction due to F0 modulation alone (Fig. 3a , d ). However, the major detrimental effect on template contrast is an interaction between reverberation and F0 modulation (Fig. 3a , e ). In the combined presence of reverberation and F0 modulation many units do not have a significant representation of the periodicity corresponding to this single vowel in their inter-spike-interval distributions; the many non-significant gray symbols in Fig. 3e . — Dijk, Pim van, Physiology, Psychoacoustics and…, 5047