Analysis of information sources in references of the Wikipedia article "ख़" in Hindi language version.
... An Ardha-visarga ... sometimes employed before k,kh and p,ph. Before the two former letters this symbol is properly called Jihva-muliya, and the organ of its enunciation said to be the root of the tongue ...
... This weakened variant, also spelled with visarga, is described by grammarians as a weak voiceless fricative that varies in place of constriction in accordance with the following consonant: labial before /p, ph/, retroflex before /ṣ, ṭ, ṭh/, palatal before /ś, č, čh/, and velar before /k, kh/ ...
... An Ardha-visarga ... sometimes employed before k,kh and p,ph. Before the two former letters this symbol is properly called Jihva-muliya, and the organ of its enunciation said to be the root of the tongue ...