ɐ kˈɑːmən jˈuːnɪt ʌv ɛkspˈoʊʒɚɹ ʌv lˈʌŋ tˈɪʃuː tʊ ˈælfə ɪmˈɪɾɚz ɪz ðə wˈɜːkɪŋ lˈɛvəl mˈʌnθ dˌʌbəljˌuːˌɛlˈɛm, ðɪs ɪz wˌɛɹ ðə hjˈuːmən lˈʌŋz hɐvbɪn ɛkspˈoʊzd fɔːɹ wˈʌnhˈʌndɹɪd sˈɛvənti ˈaʊɚz ɐ tˈɪpɪkəl mˈʌnθ wˈɜːθ ʌv wˈɜːk fɚɹə mˈaɪnɚ tʊ ˈɛɹ wˌɪtʃ hɐz θɹˈiː.sˈɛvən kˈeɪ bˌiːkjˈuː ʌv tˈuːhˈʌndɹɪd twˈɛnti tˈuː ˌɑːɹɹˈɛn ɪn ˌiːkwɪlˈɪbɹiəm wɪð ɪts dᵻkˈeɪ pɹˈɑːdʌkts.
A common unit of exposure of lung tissue to alpha emitters is the working level month (WLM), this is where the human lungs have been exposed for 170 hours (a typical month worth of work for a miner) to air which has 3.7 kBq of 222Rn (in equilibrium with its decay products).