Complex sentence: Voiced consonant letters frequently come to represent voiceless sounds (as shown in the tables); this occurs at the end of words and in certain clusters, due to the neutralization described in "Voicing and devoicing" in the article on Polish phonology.
Split into simpler sentences: Voiced consonant letters frequently come to represent voiceless sounds (as shown in the above tables). The conditions for this neutralization are described under "Voicing and devoicing" in the article on Polish phonology.