perceptibly

The energy in the audience shifted slightly but perceptibly: Wait, is he rapping?

But like Biden, regardless of the perception that he's not, he looks perceptibly older these days.

The Popecoat, then, arrived at a moment of clear and justifiable alarm over AI-generated imagery, and when its realism had advanced perceptibly even from their capabilities a matter of weeks ago.

He found Mr. Biden has a “perceptibly stiffer” gait and “increasing frequency and severity” of throat clearing, but nothing of serious concern.

She slows perceptibly, and the otherwise intense beam of her attention softens.