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Introduction to the 7000 Hearing Aid Test System

Introduction to the 7000 Hearing Aid Test System. By: Kristina Frye Frye Electronics, Inc. Outline. Real-ear Measurements Entering an Audiogram Real-ear SPL measurements Visible Speech Insertion Gain Coupler Measurements ANSI Coupler Multicurve

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Introduction to the 7000 Hearing Aid Test System

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

  2. Outline • 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

  3. 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.

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

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

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

  7. 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

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

  9. 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

  10. Real-ear NOAH Module Use NOAH Module to send target settings

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

  12. Step 2: Level LEVEL

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

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

  15. Step 5: Aided @ 65 dB SPL REAR @ 65 dB

  16. Step 6: REAR @ 80 dB SPL REAR @ 80 dB

  17. Step 7: REAR @ 90 dB with Burst REAR @ 90 dB

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

  19. 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

  20. Audiometric Info tab Confirm NOAH Audiogram has been imported

  21. Target Settings Check the target settings are correct

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

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

  24. REUR in NOAH Module Test automatically advances to CRV 1: REAR @ 50 dB SPL Put hearing aid on patient Click Start

  25. REAR in NOAH Module Test automatically advances to CRV 2: REAR @ 65 dB SPL Turn off other targets if desired by deselecting target boxes Click Start to measure Curve 2

  26. Completed Real-ear SPL Test

  27. Fully Automatic Test Run only selected curves

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

  29. 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 • HTLs • UCLs • SII • Reference microphone • All on one graph in dB SPL

  30. Visible Speech: Before Test UCLs Targets HTLs

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

  32. 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)

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

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

  35. Insertion Gain features • Unaided measurement • Up to 4 aided measurements • Gives up to 4 insertion gain measurements • Operation similar to coupler screen

  36. Insertion Gain screen Target Insertion Gain Aided Select amplitude Unaided F1 — Select ear F2 — Select curve F5 — Select source type

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

  38. Aided/IG measurements IG Target IG curve F2 — REAR 2

  39. Multiple Aided/IG measures

  40. Testing Directionality Directional Advantage CRV 2 — Forward response CRV 1 — Reverse response

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

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

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

  44. Basic Coupler Measurements Coupler Multicurve — F1 ANSI 03 — F4

  45. ANSI 03 Settings Aid type Telecoil Frequencies Choose ear

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

  47. Troubleshooter ANSI

  48. 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.

  49. Coupler Screen Operation Amplitude Choose Ear Select Curve Source Type

  50. Example 50 dB 60 dB 70 dB 80 dB

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