EN
The study endeavours to probe into the perception of English lenis plosive consonants word-initially and word-finally by the Poles without any experience with English either in form of formal classroom teaching or contacts with native speakers. It proceeds from a concise contrastive articulatory and acoustic juxtaposition of Polish and English plosives, grouped into respective phenomena, to the analysis of research data. The research is expected to shed some light upon efficiency of the perception of lenis plosives by the Poles, who utilise the voiced - voiceless rather than fortis - lenis distinction as a functional contrast. Then, more detailed questions are posed concerning the potential influence of neighbouring sounds, such as vowels of front or back quality, on the perception. Finally, certain observed tendencies and regularities are indicated.