Avery Stone of Noisey described Eilish's soprano vocals as "ethereal",[54] and Maura Johnston of Rolling Stone characterized them as "whispery".[55] Doreen St. Félix of The New Yorker opined that she has a "husky, slurring voice that she can thin out to reedy".[56] Her music incorporates alternative pop,[57] alternative rock,[58] dark pop,[59] EDM,[60] electropop,[57] indie pop,[61][57] pop[62] and trap.[60]

Avery Stone of Noisey described Eilish's soprano vocals as "ethereal",[54] and Maura Johnston of Rolling Stone characterized them as "whispery".[55] Doreen St. Félix of The New Yorker opined that she has a "husky, slurring voice that she can thin out to reedy".[56] Her music incorporates alternative pop,[57] alternative rock,[58] dark pop,[59] EDM,[60] electropop,[57] indie pop,[61][57] pop[62] and trap.[60]