ʃɹˈɜːdɪŋɡɚz θˈɔːt ɛkspˈɛɹɪmənt ɪmˈædʒɪnd ɐ kˈæt ɪn ɐ stˈiːl bˈɑːks, təɡˌɛðɚ wɪð ɐ smˈɔːl sˈæmpəl ʌv sˌʌm ɹˌeɪdɪoʊˈæktɪv mətˈɪɹiəl ɪnwˌɪtʃ ðɛɹwˌʌz ɐ fˈɪfti pɚsˈɛnt tʃˈæns ðˈæt, ɪn ˌɛni ˈaʊɚ, wˈʌn ˈæɾəm wʊd dᵻkˈeɪ ænd ɪmˈɪt ɹˌeɪdɪoʊæktˈɪvᵻɾi.
Schrödinger's thought experiment imagined a cat in a steel box, together with a small sample of some radioactive material in which there was a 50% chance that, in any hour, one atom would decay and emit radioactivity.