mˈoːɹ spˈɛʃəlˌaɪzd dɪtˈɛktɚz duːnˌɑːt nˌɛsɪsˈɛɹᵻli hæv ɐ hɜːmˈɛɾɪk kənstɹˈʌkʃən; fɔːɹ ɛɡzˈæmpəl, ˌɛlˌeɪtʃsˌiːbˈiː kˈʌvɚz ˈoʊnli ðə fˈɔːɹwɚd hˈaɪsˌuːdoʊɹɐpˈɪdᵻɾi ɹˈiːdʒən, bɪkˈʌz ðɪs kˌɔːɹɪspˈɑːndz tə ðə fˈeɪz spˈeɪs ɹˈiːdʒən ʌv ɡɹˈeɪɾɪst ˈɪntɹɛst tʊ ɪts fˈɪzɪks pɹˈoʊɡɹæm.
More specialised detectors do not necessarily have a hermetic construction; for example, LHCb covers only the forward (high-pseudorapidity) region, because this corresponds to the phase space region of greatest interest to its physics program.