RIC IG Closed Tip Responses

Check and Double Check – Closed Fit, Part 1 In a previous blog I provided the graph in Figure 1 of an RIC (receiver-in-the-canal) hearing aid fitted with a closed coupler, showing that greater sound pressure resulted, especially in the high frequencies, as the fitting tip was inserted more deeply into the ear canal.  These were…

Read More

Hearing Aid Verification Using Functional Gain – Part II

Note:  This is a continuation of a previous blog: Hearing Aid Verification Using Functional Gain – Part I, which was last week’s blog.   Functional Gain in Hearing Aids   Functional Gain (FG) = Aided Threshold minus the Unaided Threshold (FG = A-U). Unaided thresholds are measured to tones presented through the loudspeaker(s). Various frequencies…

Read More