what's the meaning of the word “coldly” here
‘Take her away, man,’ said the Commandant, with scornful ferocity.
‘In a day or two perhaps,’ said Gerald, patiently polite. ‘I admit that we are disappointed with Holihaven.’
‘Now. While there’s still time. This instant.’
There was an intensity of conviction about the Commandant which was alarming.
Gerald considered. Even the empty lounge, with its dreary decorations and commonplace furniture, seemed inimical. ‘They can hardly go on practising all night,’ he said. But now it was fear that hushed his voice.
‘Practising!’ The Commandant’s scorn flickered coldly through the overheated room.
‘They’re ringing to wake the dead.’
Q： what's the meaning of the word “coldly” here in "flcickered coldly through the overheated room"? Here, "coldly" and "overheated" contrast each other, does it have any implicative meaning?