Her clapping certainly alerted him, alright. To the point where he couldn't help but tense when he heard it, having been caught completely by surprise. Normally, his senses were a lot more alert than that, and he would've been able to sense anyone within his immediate vicinity. So either he had been really focused... or he was slipping up thanks to whatever was messing with his ki.

Neither option really thrilled him.

He simply floated there for a moment as Kit clapped, a part of him embarrassed that she'd been impressed by his tests. She looked young though, so he supposed it was to be expected. Nonetheless, Gohan had always been the humble type, even now. "Um... thanks?"