IS 10781:1984-Specification for Reference Coupler for the Measurement of Hearing Aids Using Earphones Coupled to The Ear by Means of Ear Inserts 

 - New Delhi :  Bureau of Indian Standards (BIS),  1984. 
 - 7 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hearing aids