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Siemens SD 270 User Manual
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58
7. F
ree Field Recorded Speec
h Audiometry with Competing
Noise (Audiomet
er
-Generated)
7.1 Set Up – as described in 6.1 then
f
Select MASK.
f
Select internal masking sour
ce using Softke
y 4 (the INT option is
display
ed in capitals); wideband noise is rout
ed to t
he
compe
ting LINE OUT channel.
f
The lev
el of compe
ting noise is adjusted in 5db steps using t
he
MASK ro
tar
y control.
7.2 Procedure
As described in 3.2 but adjusting the compe
ting noise lev
el as
req
uired.
57
59
Table of Contents
Overview of SD 270 Audiometer Controls
2
Table of Contents
3
Contents
3
Introduction
6
Intended Applications
6
Unpacking
6
Standard Contents
6
Optional Accessories
7
Frequently Used Functions
7
Known Contradictions
7
Important Safety Instructions
8
Precautions
8
Electromagnetic Compatibility (EMC) Considerations
9
Mains Supply Operation
10
Audiometer Connections
11
Data Transfer to a Printer
12
Data Transfer to a Computer
13
Line In/Out Connection (Audio)
13
Using the Audiometer
14
Ambient Conditions
14
Switching the Audiometer on and off
14
Operating Language
14
Testing the Patient Response Switch
15
Audiometer Display
15
Audiometer Controls
15
Threshold Retention Function
30
Uncomfortable Loudness Levels
31
Saving Audiograms in Internal Memory
31
Loading Audiograms from Internal Memory
32
Printing Audiograms
32
Data Transfer to a NOAH Database
33
Sequence of Operation and Suggested Test Procedure
34
Pre-Test
34
Test
34
Post-Test
35
Specification
36
Output Data
36
Maximum Hearing Levels Provided at each Frequency
37
Physical Data
37
Equipment Classification
38
Symbols
39
Technical Information
40
Routine Maintenance
43
Audiometer Maintenance
43
Transducer Maintenance
43
Mains Adapter Maintenance
45
Perform Listening Check
45
Instrument Storage and Transportation
46
Calibration & Return of the Instrument
47
Guarantee
48
Ordering Consumables & Accessories
49
Appendix 1 - Speech Audiometry
50
Headphone and Free Field Testing
50
Operator Monitoring
50
Test Modes in Speech Audiometry
51
Display Counter
51
Live Voice Speech Audiometry to Headphones
52
Live Voice Speech Audiometry with Contralateral Masking
53
Recorded Speech Audiometry to Headphones
54
Recorded Speech Audiometry to Headphones with Contralateral Masking
55
Free Field Live Voice Speech Audiometry
56
Free Field Recorded Speech Audiometry
57
Free Field Recorded Speech Audiometry with Competing Noise (Audiometer-Generated)
58
Free Field Recorded Speech Audiometry with Competing Noise (Recorded)
59
Appendix 2 - Free Field Calibration Procedure
60
Assurance of Calibration
60
External Amplifier and Loudspeaker
60
Calibration Overview
60
Free-Field Speech Calibration
61
Free-Field Warble Tones Calibration
64
Free-Field Live Speech Calibration
67
Appendix 3 - EMC Guidance & Manufacturer's Declaration
68
Appendix 4 - Use with Non-Medical Electrical Equipment
74
Appendix 5 - Technical Support Contacts
81
Disposal Information
83
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Siemens SD 270 Specifications
General
Brand
Siemens
Model
SD 270
Category
Measuring Instruments
Language
English
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