Keltron Hearing Aid Is A Low Cost, Highly Featured Digital Programmable Hearing Aid Using Indigenously Developed Application Specific Integrated Circuit (Asic) Technology. Using Sophisticated Digital Signal Processing (Dsp) Techniques, The Product Offers Superior And Stable Amplification Characteristics Over A wider Dynamic Range. Frequency – dependent Filtering Finely Matches The Audiogram of The Specific User, With Programmability For His/her Individual Hearing Loss Over A Period Of Time.