The present paper deals with the acoustic characteristics of the English central diphthong /ˊ͜υə/ and presents an analysis and a description of the experimental data based on the oscillograms and spectrograms of bisyllabic and polysyllabic English words: aˊssure, ˊcontour, ˊinfluence, buˊreaucracy, ˊtenure, ˊrural. We proved that the articulatory dynamics of the diphthong /ˊ͜υə/ correspond to the syllabic/syllable model having its borders and top. The syllable diphthong /ˊ͜υə/ differ from monophthongs and other compound English sounds by a special articulation and correlation of the tongue and prelaringal impulses. The peculiarity of the syllable diphthong /ˊ͜υə/ is the subordination of consonant activity to the vocalistic one and this differentiating it from syllables with other structure. We came to the conclusion that the English diphthong /ˊ͜υə/, from the point of view of articulation and acoustic characteristics, differ from monophthongs by an unequal correlation of tongue impulses and those of the pre-laryngeal zone of the pharynx and have different durations. The “diphthongal” feature of tensity is manifested in this diphthong /ˊ͜υə/ continuously on the length of its both elements and in such a way unifying them in the diphthong structure. The articulation and acoustic characteristics dynamics of the diphthong /ˊ͜υə/ is characterized by a gradual (step by step) energy decrease of the articulation and acoustic complex which shows that this descending diphthong /ˊ͜υə/ is a monophonematic one. There is a corresponding diphthong in the Romanian phonological system for the English diphthong /ˊ͜υə/. The stress in English diphthong /ˊ͜υə/ is on the first element, while in the Romanian language the stress is on the second element /υəˊ/. In this context it should be mentioned that speakers of the Romanian Language must change the stress from the second element on the first one, must avoid any tendencies of lengthening the first element or pronouncing the elements of the diphthong separately.