tasmād ete dhvanayo 'tīndriyayā śaktyā śrotrendriyasya śaktimatīndriyāmutpādayantaḥ sphuranti vyaktihetavaḥ / śabdānām ityapekṣaṇīyam //
Therefore these articulations, through their imperceptible capacity, producing an imperceptible capacity in the auditory organ, appear as causes of manifestation—[where] "of sounds" is to be understood.