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RM500SL
®
User's Guide Version 3.12
March 2015
the hearing aid settings and cannot be reliably predicted from 2cc coupler measurements.
SII calculation in Speechmap
The RM500SL calculates a Speech Intelligibility Index (SII) value (in %) for unaided speech at 65 dB SPL and
for each aided test. The calculations use the 1/3 octave band method of ANSI S3.5 –1997 without the 160 Hz
band and without masking effects with results expressed as a % by multiplying by 100. Level distortion effects
are included but no hearing loss desensitization is applied. An idealized speech region of LTASS +/- 15 dB is
used.
The speech recognition associated with a given SII is a function of the test material and the cognitive abilities of
the listener. There is considerable individual variability in relating the SII to speech recognition, especially
amongst impaired listeners. The following shows expected nominal recognition scores vs SII for normals when
using a variety of speech stimulus conditions. (Killion and Mueller, Hearing Journal, January, 2010 pp 10-15).
Using custom stimuli in Speechmap
Custom digital sound files can be used as stimuli in Speechmap. If you connect a USB stick with WAV files on
it to the RM500SL, Speechmap will make those files available as stimulus selections. This feature provides the
freedom of using any stimulus in Speechmap with all the features that Speechmap offers. Please note that fitting
targets are not available for custom stimuli.
A USB stick is required for this feature. It is highly recommended that the USB stick is formatted for data using
the Audioscan Updater prior to using this feature. The Audioscan Updater comes with any current Audioscan
software download or Cd. Visit www.audioscan.com to obtain software updates.
To use digital sound files as stimuli in Speechmap:
1. Connect a USB stick to your PC.
83
- Audioscan RM500SL 1
- User's Guide 3.12 1
- Table of Contents 2
- 1 About RM500SL 6
- SAFETY WARNINGS and NOTICES 7
- Environmental safety 7
- March 2015 10
- Electronic User’s Guide 11
- 2 Getting Started 13
- General care instructions 14
- Microphone care 15
- Battery pill use and care 15
- 3 General Operation 18
- Keypad keys 19
- Menus, lists and buttons 20
- Screen messages and Help 21
- Software updating 21
- 4 General Setup 22
- 5 Networking 24
- NOAH Service Port 25
- Testing the NOAH service port 26
- 6 Single computer connection 27
- Local printer setup 30
- Printing to USB memory 31
- Network printer setup 32
- Printing to a network file 32
- Storing and restoring data 33
- Data storage using NOAH 35
- 8 Test Box Measures - Setup 36
- 1996 or 2003 ANSI standard 37
- ANSI test frequencies 37
- Test box calibration facts 37
- 9 ANSI Hearing Aid Tests 42
- ANSI test results 44
- ANSI input-output curves 44
- ANSI telecoil terminology 45
- Telecoil test results 46
- 10 Other Test Box Measures 48
- Multicurve procedure 49
- Multicurve results 49
- Battery drain test 50
- Manual control procedure 50
- 11 Sensory loss simulator 53
- 12 On-Ear Measures - Setup 54
- Max TM SPL setup 56
- ABR nHL to eHL setup 57
- Positioning the client 57
- Positioning the probe tube 58
- SPL or HL scale 60
- Hide or show on-ear curves 61
- On-ear feedback test 62
- On-ear noise reduction test 62
- On-ear manual control 63
- 15 Occlusion Effect Test 65
- 16 RECD measurement 66
- Measure RECD 67
- RECD results 68
- ANSI S3.46(2013) RECD 69
- RECD protocols 69
- RECD facts 70
- 17 Insertion Gain 72
- Insertion gain in HL 73
- Audiometric data entry 73
- REUR measurement procedure 74
- REAR measurement procedure 75
- 18 Speechmap 77
- DSL 5.0 changes 78
- NAL-NL1 in Speechmap 78
- NAL-NL2 in Speechmap 78
- Camfit in Speechmap 79
- Using Speechmap 79
- Speechmap Setup 80
- Screen tour - aided screen 82
- On-ear or Test box mode 82
- Assessment data entry 87
- Assessment data choices 88
- Open fittings in Speechmap 91
- FM fitting and verification 93
- Speechmap stimuli 95
- Stimulus levels 95
- Microphone location effects 96
- Deep insertion compensation 97
- Speech signal analysis 97
- 21 Troubleshooting 98
- Test box speaker overdriven 99
- Invalid on-ear calibration 101
- Barcode scanner malfunction 101
- 22 Technical 104
- Specifications 104
- Sensory Loss Simulator 105
- 23 Glossary 107
- 24 References 112
- 25 Appendix 1 115
- 26 Appendix 2 118
- 1 Introduction 119
- 2 The test signals 119
- 2.1 Narrow-band signals 120
- 2.2 Broad-band signals 120
- 2.2.3 Real-speech signals 122
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