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07/05/06 © Etymonic Design Incorporated, 41 Byron Ave., Dorchester, ON, Canada N0L 1G0 Page 5
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Figure 4: Analysis bandwidths of some real-ear analyzers and critical bands for a normal ear. If the
analysis bandwidth is less than a critical band, aided response curves shown to be at threshold (or
UCL) will actually be well above it.
Figure 5: Output (left) and Gain (right) curves for a linear hearing aid, generated using a swept tone
(1) and pink noise analyzed in 1/12 octave bands (2). (Dual view not available in RM500SL)
Analysis Bandwidth Used by Various Analyzers
To Analyze Complex Signals
0
5
10
15
20
25
30
35
200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300
Band Center Frequency (Hz)
10 Log Analysis Bandwidth (Hz)
Verifit / RM500SL - Speechmap
1/24th Octave Analyzers
The Normal Ear - Critical Bands
100 Hz band analyzers