Converting insertion gain to and from headphone coupler responses.
OBJECTIVE
The paper aims to show how insertion gain responses can be translated into equivalent headphone responses, and vice versa.


METHODS
The relationship between the response types is theoretically derived by allowing for real ear to coupler differences and for real ear unaided responses.


RESULTS
The necessary corrections for each of these factors are obtained from published data, and the combined correction factors are compared with independently obtained published data.


CONCLUSIONS
The equations and data presented can be used to translate insertion gain responses into responses suitable for use with equipment using headphones and, by inference, insert phones.
Dillon
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National Acoustic Laboratories, Australia.
D006310:Hearing Aids; D006801:Humans; D014432:Tympanic Membrane