sign without sound silence on the keyboard keys of a laptop or personal computer, the concept of observing silence and noise

abstract audio black button closeup communication computer concept control design digital disable disorder dull dumb function icon inaudible indistinct key keyboard keys laptop letter loud loudspeaker macro mute muteness noise noiseless observing personal phonology please pollution prohibit quiet remote represent repress shut sign silence silent sound speaker speech speechless symbol technology unspeaking voiceless volume