ɛksˈɛsɪv vˈoʊltɪdʒ dɹˈɑːps ɪnðə pˈaʊɚ ɡɹˈɪd ɹᵻdˈuːs swˈɪtʃɪŋ spˈiːdz ænd nˈɔɪz mˈɑːɹdʒɪnz ʌv sˈɜːkɪts, ænd ɪndʒˈɛkt nˈɔɪz wˌɪtʃ mˌaɪt lˈiːd tə fˈʌŋkʃənəl fˈeɪlɪɹz.
Excessive voltage drops in the power grid reduce switching speeds and noise margins of circuits, and inject noise which might lead to functional failures.