Gain Versus Response View - Interacoustics Affinity 2.0 Additional Information

2.0
Affinity Additional Information
•
Follow the instructions appearing on the screen:
Note: If using an Affinity
2
the Equinox external loudspeaker) and press OK.
2.6.3

Gain versus Response View

To understand the various real-ear measurement terms you should be aware of the way the real-ear
acronyms are constructed.
Real-ear terms all end with either a "R" (e.g. REUR) or a "G" (e.g. REUG)
"R" refers to Response
Response measures consist of two things:
a) What you measure in the ear
b) The input you send into the ear (e.g. 50 dB SPL)
In other words the response is the total measure of output in SPL at the eardrum (e.g., REUR)
"G" refers to Gain
Gain (e.g. REUG) is calculated by subtracting the input (in dB) you used for the response measure across
frequency.
(Response – input = Gain)
This means that the input level used to generate the response is not included in the measurement result.
If you for example measure a value of 60 dB SPL in the ear canal at 2000 Hz when presenting a stimulus of
50 dB the gain is 10 dB.
250 500
REUR 52 52
- input 50 50
REUG
2 2
Total
2.0
place the in-situ headset in front of the internal loudspeaker (as shown above for
Frequency (Hz)
750 1000
53 58
50 50
3 8
1500 2000 3000
59 60 67
50 50 50
10
9 17
Page 159
4000 6000 8000
63 58 52
50 50 50
13 8 2