atha katham idam avasīyate vāyubhyo viṣayasya saṃskāro bhavati / natu viṣaya evetyāha śabdotpatter ityādi /
How is it ascertained that what proceeds from the air [vibrations] is the manifestation of the object [sound], and not the object itself? [The answer to this] is stated [in the verse] beginning with "śabdotpatteḥ."