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17 Speechmap ®
17.1 Section overview
Speechmap presents hearing threshold, UCL and amplified speech spectra as
SPL in the ear canal. The fitting goal is to make amplified speech audible and
comfortable while avoiding discomfort for loud sounds. Speechmap is normally
used in SPL and this guide describes only this usage. See
This section covers the following topics:
17.2: Speechmap facts
17.3: DSL 5.0 in Speechmap
17.4:DSL 5.0 changes
17.5: NAL-NL1 in Speechmap
17.6: Using Speechmap
Related sections are
Technical Details
FastFacts 17.1: Speechmap
17.2 Speechmap facts
Speechmap is a trademarked hearing instrument fitting environment introduced
by Audioscan in 1992. It presents hearing threshold, UCL and amplified speech
spectra as SPL in the ear canal. The fitting goal is to make amplified speech
audible and comfortable while avoiding discomfort for loud sounds. Originally
speech was simulated using amplitude-modulated tonal signals. The RM500SL
replaces these simulated speech signals with real speech, both recorded and live.
For details of the test signals and analysis methods, see
Technical
Details.
Speechmap departs from insertion gain target methods in presenting amplification
goals in the context of the residual auditory area, not as an isolated target line,
and in the use of real speech, not tones or broad-band noise. This is extremely
important for non-linear hearing aids, analog or digital, because their processing is
signal-dependent. It also makes provision to correct audiometric data and 2cc
coupler measurements for age-related or individually-measured acoustic
differences between real ears and the couplers used for calibration and testing.
The Speechmap environment provides two hearing instrument verification options:
REM (real-ear measurement) and S-REM (simulated REM). See
S-REM mode
for details.
FastFacts 17.2: Speechmap facts
0611
18: Speechmap Fitting Procedures
RM500SL User's Guide Version 2.8
11.4: SPL or HL
17.7: Screen tour – unaided screen
17.8: Screen tour - aided screen
17.9: REM or S-REM mode
17.10: SII calculation in Speechmap
and
19: Speechmap
19: Speechmap
scale.
17.9: REM or
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