tʊ ɐvˈɔɪd hˌævɪŋ ðə mˈæskɪŋ θɹˈɛʃoʊld ˌʌndɚ ðə θɹˈɛʃoʊld ɪn kwˈaɪət, wˈʌn ˈædz ðə lˈæst wˈʌn tə ðə kˌɑːmpjuːtˈeɪʃən ʌv pˈɑːɹʃəl θɹˈɛʃoʊldz.
To avoid having the masking threshold under the threshold in quiet, one adds the last one to the computation of partial thresholds.