ðə fˈoʊmz stəbˈɪlᵻɾi ɪz jˈuːʒuːəli ɛkspɹˈɛst æz ðə tˈaɪm ɹᵻkwˈaɪɚd fɔːɹ fˈɪfti pɚsˈɛnt ʌvðə lˈɪkwɪd tə dɹˈeɪn fɹʌm fˈoʊm ɐ fˈɪfti pɚsˈɛnt ɹᵻdˈʌkʃən ɪn fˈoʊm vˈɑːljuːm.
The foam's stability is usually expressed as the time required for 50% of the liquid to drain from foam (a 50% reduction in foam volume).