ðɪs lˈɪmɪt ɔnðə sˌuːdoʊɹɐpˈɪdᵻɾi ɹˈeɪndʒᵻz wˌɪtʃ kæn biː əbzˈɜːvd fˈɔːɹmz pˈɑːɹt ʌvðɪ ɐksˈɛptəns ʌvðə dɪtˈɛktɚ ˈaɪ.ˈiː. ðə ɹˈeɪndʒ ʌv fˈeɪz spˈeɪs wˌɪtʃ ɪɾ ɪz ˈeɪbəl tʊ əbzˈɜːv; bɹˈɔːdli spˈiːkɪŋ, ðə mˈeɪn dɪzˈaɪn ɑːbdʒˈɛktɪv əvə hɜːmˈɛɾɪk dɪtˈɛktɚɹ ɪz tə mˈæksɪmˌaɪz ɐksˈɛptəns, ˈaɪ.ˈiː. tʊ ɛnʃˈʊɹ ðætðə dɪtˈɛktɚɹ ɪz ˈeɪbəl tə mˈɛʒɚɹ æz lˈɑːɹdʒ ɐ fˈeɪz spˈeɪs ɹˈiːdʒən æz pˈɑːsᵻbəl.
This limit on the pseudorapidity ranges which can be observed forms part of the acceptance of the detector (i.e. the range of phase space which it is able to observe); broadly speaking, the main design objective of a hermetic detector is to maximise acceptance, i.e. to ensure that the detector is able to measure as large a phase space region as possible.