yadyapi śabdo na pratighātī tathāpi mātariśvano vāyoḥ kuḍyasya ca mūrtatvepratighātitvān na karṇadeśāgamanam iti śrotrasaṃskāro na jāyate, tenāvṛttasyāśravaṇaṃ bhavati
Although sound is not subject to obstruction, nevertheless due to the corporeality and obstructability of air and wall, there is no reaching of the ear-region and thus no embellishment of the auditory organ arises, therefore there is non-hearing of what is obstructed