squawk, beep, chirrup, trill, hiss, chitter, hum, caw, purr, birdcall, warble, whirr, katydids, whine, screech, cackle, shriek, whippoorwill, burble, tinkle, yip, croaking, cluck, shrilling, titmouse, murmur, growl, whir, chattering, yap, birdsong, crackle, meow, twittering, chickadees, whisper, bluejays, gurgle, yelp, chipping sparrow, noises, barking, chime, spring peeper, clacks, woofs, squeal, winter wren, vireo, veery, vocalization, toots, ping, phoebe, honk, meadowlarks, ovenbird, squawky, whinnies, thrum, bray, gray catbird, bleats, clatter, tintinnabulation, boop, ribbit, killdeer, wail, clop, parula, droning, towhees, belted kingfisher, bugling, chaffinch, sibilance, mewing, clunk, shout, whistles, scritch, cooing, mockingbirds, rustlings, simper, blare, vocalise, mooing, catbird, clang, buzzes, babble, sibilant, kilohertz, oinks, cacophony, quacking, gabble, wood thrush, holler, vibrating, twitter, chirping, whistle, buzz, sound, squeak, chirps, tinkling, crackling, rattle, squeaks, whistling, ringing, cps, damped, exponential, imperceptible, kc, modulated, shrill, transmitted, unmodulated, backscattered, bandlimited, biphasic, broadband, chirped, cosine, cosinusoidal, db, demodulated, diffracted, digitized

chitter, tweet, twitter

emit, let loose, let out, sing, sound, utter

cheep, chirrup, tweedle, twirp