выключить звук(отключить Artjaazz); приглушить(Artjaazz); отключить звук(To eliminate or temporarily suppress the sound produced by a device, such as a computer or digital media device. A device in such a state has a volume level of zero); отключить микрофон(An option that allows the user to temporarily suppress the device's microphone during a call so that no sound is transmitted to other call participants)
притуплённый(также "приту́пленный"; утративший силу, остроту своего проявления • Do those with psychopathy feel as if they're missing out on life because their feelings are muted?Abysslooker)