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Viewer’s notes... to help you …  At the bottom left of each page there is a page number, when the slide has finished an automated sequence a small star.

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Presentation on theme: "Viewer’s notes... to help you …  At the bottom left of each page there is a page number, when the slide has finished an automated sequence a small star."— Presentation transcript:

1 Viewer’s notes... to help you …  At the bottom left of each page there is a page number, when the slide has finished an automated sequence a small star appears in the bottom right hand corner to indicate that the slide may be ‘advanced’ when you are ready.  To run the presentation:  1. Click on the screen to make sure that the presentation window is selected.  2. Use the space bar to advance (page up should reverse)

2 Introduction to the 7000 Hearing Aid Test System By: Kristina Frye Frye Electronics, Inc.

3 Outline of this Presentation  Real-ear Measurements Entering an Audiogram Real-ear SPL measurements Visible Speech Insertion Gain  Coupler Measurements ANSI Coupler Multicurve Advanced Coupler: Enhanced DSP, Attack & Release, I/O, Battery Current

4 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.  Noise Reduction on analyzer may interfere with anti-feedback phase shifting technology. Turn OFF noise red (comp)  Real-ear targets may prescribe low frequency amplification unsuitable for open fit hearing aids.

5 Real-Ear Navigation Screen F1 — Audiogram Entry F3 — Insertion Gain F4 — Real-ear SPL Use the function keys to enter a screen F5 — Visible Speech

6 Entering an audiogram F1 — Select ear F2 — Select HTL/UCL/Bone F3 — Predict UCLs Real-Ear SPL only Adjust amplitude Adjust frequency

7 Real-ear NOAH Module Use the NOAH Module to easily import NOAH audiogram Right-click to send audiogram

8 Real-Ear SPL screen  Check low inputs are above thresholds  Check average inputs meet target  Check loud inputs are below UCLs  Auto-adjusting REUR shows amplification benefit at all levels  Gives overall look at hearing aid fitting

9 Real-ear SPL Test Screen UCLs HTLs Low, Mid, & High Targets

10 NAL-NL1 Target Settings Press MENU from Real-ear SPL screen to open local menu Channels: 1-18 Aid Limit = Output limiting Ref. Position = Leveling conditions

11 Real-ear NOAH Module Use NOAH Module to send target settings

12 Reference Mic Step 1: Setup Speaker should be 12-18 inches from patient at 45 degree angle Probe Mic

13 Step 2: Level LEVEL

14 Step 3: Unaided (optional) F2: Select Curve F4: Source Type Source Level REUR

15 Step 4: Aided @ 50 dB SPL F2: Select Curve F4: Source Type Source Level REAR @ 50 dB Notice the REUR automatically adjusts to the selected REAR

16 Step 5: Aided @ 65 dB SPL REAR @ 65 dB

17 Step 6: REAR @ 80 dB SPL REAR @ 80 dB

18 Step 7: REAR @ 90 dB with Burst REAR @ 90 dB

19 NOAH Real-ear Module Use Get Curves to grab existing results from FONIX 7000

20 Using Real-ear Module  Automatically uses latest NOAH audiogram  Send audiogram and target to analyzer to measure with analyzer controls. Use Get Curves to grab tests results  Or perform measurements using Windows controls

21 Audiometric Info tab Confirm NOAH Audiogram has been imported

22 Target Settings Check the target settings are correct

23 Test Setup Select Test Type Level Sound Field Speaker Select Curve to Measure Click Start

24 Real-ear SPL in NOAH Real-ear Module Select SPL & Real-ear Select curve to test Level sound field Start Test

25 Completed Real-ear SPL Test

26 Automatic Testing Run only selected curves Manual testing: Automatically advance to next curve after measurement

27 Fully Automatic Test Select the curves you want to measure Select “Run Measurements Automatically” Click Start

28 Visible Speech  Use live speech signal  Real-time response (during test)  Average response  Minimum and maximum response per frequency for the length of the test (optional)  HTLs  UCLs  SII  Reference microphone  All on one graph in dB SPL

29 Visible Speech: Before Test UCLs HTLs Targets

30 Visible Speech: Test Results Max boundary Avg Response Min boundary HTLs UCLs Speech Intelligibility Index RMS Info gives important info about test

31 RMS Info in Visible Speech  Max = RMS of the maximum curve  Min = RMS of minimum curve  Avg = RMS of average curve  Ref = RMS of reference microphone (input)

32 Visible Speech without Max/Min Press MENU to open local menu. Adjust Min/Max setting.

33 Visible Speech in Real-ear NOAH Set test to Real-ear SPL Set Input Type to Visible Speech Click Start Visible Speech only available in CRV 1 and CRV 2 Min/Max boundaries plus real-time curve

34 Insertion Gain features  Unaided measurement  Up to 4 aided measurements  Gives up to 4 insertion gain measurements

35 Insertion Gain screen F1 — Select earF2 — Select curveF5 — Select source type Select amplitude Insertion Gain Target Unaided Aided

36 Unaided Measurement Peak at 3 kHz Negative response at 6 kHz shows probe tube could probably be inserted more deeply F2 - REUR 1F5 - DigSpeech Amplitude

37 Aided/IG measurements F2 — REAR 2 IG Target IG curve

38 Multiple Aided/IG measures

39 Testing Directionality Directional Advantage CRV 2 — Forward response CRV 1 — Reverse response

40 Gain with Real-ear NOAH Gain = Probe mic inside ear – Ref mic outside ear

41 Insertion Gain with NOAH REIG = REAG – REUG. If REUG not measured, average curve used.

42 Coupler Measurements ANSI, Coupler Multicurve, Enhanced DSP, Battery, Attack & Release, I/O

43 Basic Coupler Measurements ANSI 03 — F4Coupler Multicurve — F1

44 ANSI 03 Settings Choose ear Aid type Frequencies Telecoil

45 ANSI 03 Results OSPL90 Response curve Max OSPL90-HFA Distortion FOG Telecoil EIN Battery current Telecoil I/O curves Attack & Release

46 Troubleshooter ANSI

47 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.

48 Coupler Screen Operation Choose Ear Select CurveSource Type Amplitude

49 Example 50 dB 60 dB 70 dB 80 dB

50 Troubleshooter Coupler Multicurve

51 Testing Digital Aids  Digital Speech  Type of Composite signal  Modulated to allow testing of noise reducing digital aids  Used with ANSI or ICRA speech spectra

52 Example of digital aid test Digital Speech Composite

53 Testing Open Fit Hearing Aids  The Open Fit Coupler was designed to Provide a realistic response for open fit hearing aids. Provide an easy mechanism for attaching an open fit hearing aid to a coupler  The Open Fit Coupler is a non-standard sized coupler not designed to test to manufacturing specifications

54 Attaching the Open Fit Coupler CRV 1 = Open Fit Coupler CRV 2 = HA-1 CRV 3 = HA-2 w/attachment CRV 4 = KEMAR

55 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

56 Forward/Reverse Positioning Forward positioning with hearing aid pointed towards sound chamber speaker Reverse positioning with hearing aid pointed away from sound chamber speaker

57 Directional Advantage Forward measurement Reverse measurement 6 dB RMS Difference

58 Coupler Automation  Set up own test sequence  Select signal type for each curve  Select signal amplitude for each curve  Add any desired pauses in test sequence  Save and auto load test sequence

59 Programming Auto Mode F6 — Program Mode Help window w/instructions F5 — Source Type Amplitude START STOP Advance to next curve without pause Advance to next curve with pause

60 Example of Auto Test Digital Speech @ 50, 65, 80 dB Pure-tone sweep @ 90 dB F6 — Fully Automatic mode

61 Saving and Loading Settings Automatically load saved curve group and put analyzer in Auto Mode

62 Troubleshooter Profiler Great for baseline testing… save time!

63 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

64 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

65 Battery Current Screen Toggle estimated battery life Turn on/off freq graph Turn on/off amp graph Press START to measure graphs

66 Coupler I/O Test Results Frequency Test Results F5: Source Type

67 Attack & Release Test Screen  Visual time graph of Attack and Release tests  Scale graphs independently to zoom in on results  Use Composite or Pure-tone  Choose any frequency from 200-8000 Hz in 100 Hz intervals  Customize amplitudes used in tests

68 Attack & Release Results Frequency F5: Source type F6 & F7: Change graph scales

69 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?

70 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.

71 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.

72 Example Group Delay Phase

73 Thank you for your time! Please email for more Frye Electronics, 9826 SW Tigard St, Tigard, OR 97223, USA Tel: 503-620-2722 or 800-547-8209

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