Affinity
2.0
Additional Information Page 265
Question:
When I do the REUR with an ICRA or ISTS I get a pretty flat curve:
When I do the REUR with a warble tone I get, what I think is a correct curve:
What is the reason for this difference?
Answer:
With response measurements you are measuring the ear canal + the signal you are using. This means that
you have two components affecting the result.
When using pure tones the signal has the same energy at each frequency. Then you get an REUR the
shape similar to the lower image above. However, your curves above are correct as well. When you are
using a broad band signal the energy is not the same at each frequency and this affects the response
measure! This can be seen from your own examples above.
The REUG does not take into account the test signal. This is why you don’t see a similar difference for the
REUG
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