silentious

hushed mum mute restrained reticent

bashful buttoned-up checked clammed up close closed-up closemouthed curbed dumb dummied up faint hush iced inarticulate incoherent inconversable indistinct inhibited laconic mousy muted noiseless nonvocal not talkative reserved shy soundless still struck dumb taciturn tongue-tied unclear uncommunicative unheard unsociable unspeaking voiceless wordless zipped

clamorous communicative explicit noisy talkative tangible

inaudible

hushed muffled mum mute noiseless quiet soundless speechless unhearable voiceless

audible heard noisy talkative