Introduction to the FONIX 7000 Hearing Aid Test System
description
Transcript of Introduction to the FONIX 7000 Hearing Aid Test System
![Page 1: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/1.jpg)
Introduction to the FONIX 7000 Hearing Aid Test System
Software version 1.60
![Page 2: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/2.jpg)
Outline
Coupler Measurements Basic (ANSI, Coupler Multicurve) Testing Digital Aids Open Fit Coupler Measuring directionality Automation Advanced Coupler
Real-Ear Measurements Entering an audiogram Insertion Gain Testing directionality Real-ear SPL Visible Speech Testing Open Fit hearing aids
Default Settings
![Page 3: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/3.jpg)
Basic Coupler Measurements
ANSI 03 — F4Coupler Multicurve — F1
![Page 4: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/4.jpg)
ANSI 03 Settings
Choose ear
Aid type
Frequencies Telecoil
![Page 5: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/5.jpg)
ANSI 03 Results
OSPL90
Response curve
Max
OSPL90-HFA
Distortion
FOG
TelecoilEIN
Battery current
Telecoil I/O curves
Attack & Release
![Page 6: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/6.jpg)
Coupler Multicurve Features
Realistic frequency response measurements
Variety of signal types: Composite, Digital Speech, Pure-tone sweeps
Display 10 different curves simultaneously
Switch back and forth between gain and output. All curves translated.
![Page 7: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/7.jpg)
Coupler Screen Operation
Choose Ear
Select Curve Source Type
Amplitude
![Page 8: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/8.jpg)
Example
50 dB
60 dB
70 dB
80 dB
![Page 9: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/9.jpg)
Testing Digital Aids
Digital SpeechType of Composite signalModulated to allow testing of noise
reducing digital aidsUsed with ANSI or ICRA speech spectra
![Page 10: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/10.jpg)
Example of digital aid test
Digital Speech
Composite
![Page 11: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/11.jpg)
Testing Open Fit Hearing Aids
The Open Fit Coupler was designed toProvide a realistic response for open fit
hearing aids.Provide an easy mechanism for attaching
an open fit hearing aid to a couplerThe Open Fit Coupler is a non-standard
sized coupler not designed to test to manufacturing specifications
![Page 12: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/12.jpg)
Attaching the Open Fit Coupler
![Page 13: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/13.jpg)
Testing Directionality
Use chamber design to perform “forward” and “reverse” measurements to obtain directional advantage
Chamber speaker mounted at 45 degree angle, pointing towards left side of chamber
![Page 14: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/14.jpg)
Forward/Reverse Positioning
Forward positioning with hearing aid pointed towards sound chamber speaker
Reverse positioning with hearing aid pointed away from sound chamber speaker
![Page 15: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/15.jpg)
Directional Advantage
Forward measurement
Reverse measurement
6 dB RMS Difference
![Page 16: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/16.jpg)
Coupler Automation
Set up own test sequenceSelect signal type for each curveSelect signal amplitude for each curveAdd any desired pauses in test
sequenceSave and auto load test sequence
![Page 17: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/17.jpg)
Programming Auto Mode
F6 — Program Mode
Help window w/instruction
s
F5 — Source TypeAmplitude
START
STOP
Advance to next curve without pause
Advance to next curve with pause
![Page 18: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/18.jpg)
Example of Auto Test
Digital Speech @ 50, 65, 80 dB
Pure-tone sweep @ 90 dB
F6 — Fully Automatic mode
![Page 19: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/19.jpg)
Saving and Loading Settings
Automatically load saved curve group and put analyzer in Auto Mode
![Page 20: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/20.jpg)
Advanced Coupler
Battery Current [F1]Coupler I/O [F2]Attack & Release [F3]Enhanced DSP [F4]
Function key operations available in the Advanced Coupler Navigation Screen
![Page 21: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/21.jpg)
Battery Current Screen
Measure Battery Current as a function of frequency
Measure Battery Current as a function of amplitude
Estimate battery life of hearing aid
![Page 22: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/22.jpg)
Battery Current Test
Battery current by freq
Battery current by amp
![Page 23: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/23.jpg)
Coupler I/O
Composite or Pure-tone source typesAny Freq from 200 to 8000 Hz in 100 Hz
intervalsDisplay results in Output (SPL) or GainGraph and data results given
![Page 24: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/24.jpg)
Coupler I/O Test Results
Frequency
Test Results
F5: Source Type
![Page 25: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/25.jpg)
Attack & Release Test Screen
Visual time graph of Attack and Release tests
Scale graphs independently to zoom in on results
Use Composite or Pure-toneChoose any frequency from 200-8000
Hz in 100 Hz intervalsCustomize amplitudes used in tests
![Page 26: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/26.jpg)
Attack & Release Results
Frequency
F5: Source type
F6 & F7: Change graph scales
![Page 27: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/27.jpg)
Enhanced DSP
Designed to measure the "group delay" of a DSP aid. In other words, the actual digital processing time of a hearing aid. 0 ms for analog aids 1-12 ms for DSP Great way to check if aid is analog or DSP
Also tests the "phase" of a hearing aid. This is useful for binaural fittings. Are the aids working together?
![Page 28: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/28.jpg)
Technical Details: Group Delay
An impulse signal is delivered to the hearing aid. The time of the maximum peak of the response is considered the group delay. The 7000 system delay is subtracted from this value to obtain the final measurement.
![Page 29: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/29.jpg)
Technical Details: Phase
One pulse of a 1000 Hz cosine signal is delivered to the aid. This signal is 1 msec long. The first 20 msec of the aid's response to the signal is displayed in graphical format.
![Page 30: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/30.jpg)
Example
Group Delay Phase
![Page 31: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/31.jpg)
Basic Real-Ear measurements
F1 — Audiogram Entry
F2 — Target EditF3 — Insertion Gain
F4 — Real-ear SPL
Use the function keys to enter a screen
F5 — Visible Speech
![Page 32: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/32.jpg)
Entering an audiogram
F1 — Select ear
F2 — Select HTL/UCL/Bone
F3 — Predict UCLs
Real-Ear SPL only
Adjust amplitude
Adjust frequency
![Page 33: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/33.jpg)
Insertion Gain features
Unaided measurementUp to 4 aided measurementsGives up to 4 insertion gain
measurementsOperation similar to coupler screen
![Page 34: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/34.jpg)
Insertion Gain screen
F1 — Select ear F2 — Select curveF5 — Select source type
Select amplitude
Insertion Gain
Target
Unaided
Aided
![Page 35: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/35.jpg)
Step 1: Setup
Speaker should be 12 inches from patient at 45
degree angle
Reference Mic
Probe Mic
![Page 36: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/36.jpg)
Step 2: Level
LEVEL
![Page 37: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/37.jpg)
Step 3: Unaided Measurement
Peak at 3 kHz
Negative response at 6 kHz shows probe tube could probably be inserted more deeply
F2 - REUR 1 F5 - DigSpeech
Amplitude
START
STOP
![Page 38: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/38.jpg)
Step 4: Aided/IG measurements
F2 — REAR 2
IG Target
IG curve
![Page 39: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/39.jpg)
Multiple Aided/IG measures
![Page 40: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/40.jpg)
Testing Directionality
Directional Advantage
CRV 2 — Forward response
CRV 1 — Reverse response
![Page 41: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/41.jpg)
Real-Ear SPL screen
Check low inputs are above thresholdsCheck average inputs meet targetCheck loud inputs are below UCLsAuto-adjusting REUR shows
amplification benefit at all levelsGives overall look at hearing aid fittingOperation similar to coupler & IG
screens
![Page 42: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/42.jpg)
SPL operation
T = Thresholds
U = UCLs
H, M, L = Targets
![Page 43: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/43.jpg)
Auto-Adjusting REUR Option
REUR 1 automatically adjusts when the 80 dB REAR 4 curve is selected
REUR 1 adjusted to 80 dB
REAR 4 @ 80 dB
![Page 44: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/44.jpg)
Visible Speech
Use live speech signalReal-time response (during test)Average responseMinimum and maximum response per
frequency for the length of the testHTLsUCLsAll on one graph in dB SPL
![Page 45: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/45.jpg)
Visible Speech: Before Test
UCLs
HTLs
Targets
![Page 46: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/46.jpg)
Visible Speech: Test Results
Max boundary
Avg Response
Min boundary
HTLs
UCLs (off screen)
![Page 47: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/47.jpg)
Open Fit Hearing Aids
Some Open Fit hearing aids interfere with the reference microphone measurements outside the ear.
Disable the Reference Microphone in the local menu to perform real-ear on these hearing aids.
Real-ear targets may prescribe low frequency amplification unsuitable for open fit hearing aids.
![Page 48: Introduction to the FONIX 7000 Hearing Aid Test System](https://reader035.fdocuments.us/reader035/viewer/2022081508/56815580550346895dc34cb8/html5/thumbnails/48.jpg)
Default Settings
Press [MENU] from the Opening Screen to enter the Setup Menu
Use [F1] in the Setup Menu to choose between:General SettingsCoupler SettingsReal-ear Settings