00455nam a22001097a 4500999001700000245014900017260005800166300000900224650001700233942000700250952008800257  c16270d16270  aIS 10781:1984-Specification for Reference Coupler for the Measurement of Hearing Aids Using Earphones Coupled to The Ear by Means of Ear Inserts  aNew Delhi :bBureau of Indian Standards (BIS),c1984.  a7 p.  aHearing aids  cST  00104070aAIISHbAIISHd2020-06-23l0pST057r2020-06-23 00:00:00w2020-06-23yST