vyavasthādvayam prāpteratulyatvavyavasthā, śrotrānekatvavyavasthā ca / yadvā śabdasya grahaṇāgrahaṇe vyavasthādvayam //
[There are] two limitations: the limitation of unequal contact [with sounds], and the limitation of the multiplicity of auditory organs; or alternatively, the "two limitations" may be those pertaining to the apprehension and non-apprehension of sound.