Frye FONIX 7000 Manual do Utilizador

Hearing Aid Test SystemOperator’s Manual Version 1.51©2006, Frye Electronics, Inc. All rights reservedOct. 23, 2006FONIX® 7000

2 FONIX 7000 Hearing Aid Analyzerwere implemented and tested on other Frye instruments. The FP40 analyzer introduced “function buttons” that adapt to

92 FONIX 7000 Hearing Aid AnalyzerIf there is a sequence of tests that you would like to perform frequently, you can save it into the 7000 Test Syste

Basic Sound Chamber Tests 933.8.2 Loading a Saved Test SequenceIt is not necessary to permanently save a custom test sequence, but doing so allows yo

94 FONIX 7000 Hearing Aid Analyzer1. If desired, follow the instructions in Section 3.8.2 to load a test sequence. You can do this by following the

Basic Sound Chamber Tests 95Measurement Settings• Coupler Type: The type of coupler being used in making sound chamber measurements. Selections of C

96 FONIX 7000 Hearing Aid Analyzer• Misc Meas Delay: The amount of time each subsequent tone is presented before the measurements is made in one of

Chapter 4 97 Advanced Coupler Tests4.1 Enhanced DSPThe Enhanced DSP measurement screen was designed to give you more infor-mation about digital hear

98 FONIX 7000 Hearing Aid AnalyzerTechnical detailsThe digital processing delay measurement is taken by sending a short impulse from the sound chambe

Automated Test Sequences 99It then continues through a complete cycle and terminates when it reaches the baseline again. This signal, although consis

100 FONIX 7000 Hearing Aid AnalyzerWhen measuring a set of binaural hearing aids, both the phase and the delay graphs should match fairly closely. 4.

Automated Test Sequences 101Figure 4.2—Battery Current Test1. mA/Freq graph2. mA/Ampl graph3. Static test (estimated battery life)4. Selected tes

Introduction and Setup 3with a probe microphone. Using real-ear measurements makes it possible to individualize the fitting of a hearing aid since a

102 FONIX 7000 Hearing Aid Analyzer4.2.2 mA/FreqThe mA/Freq test shows how much battery current the hearing aid drains when exposed to different fre

Automated Test Sequences 103• You can view the numerical data results by entering the local menu by pressing [MENU] and setting DATA/GRAPH to DATA b

104 FONIX 7000 Hearing Aid AnalyzerA few technical details about this test:• Choose between showing test results in SPL (Output) and Gain in the loc

Automated Test Sequences 105Figure 4.4—Attack & Release Test1. Attack graph2. Release graph3. Measured Attack & Release times and test se

106 FONIX 7000 Hearing Aid AnalyzerFor most hearing aids, the most interesting part of the attack and release mea-surements occurs at the beginning o

Chapter 5 107 Automated Test SequencesThere are several automated coupler test sequences available for the 7000 hear-ing aid analyzer. The test seque

108 FONIX 7000 Hearing Aid AnalyzerHere are the main differences between ANSI 87 and ANSI 96:• AGC aids are tested at reduced reference test gain in

Automated Test Sequences 1093. Position the hearing aid/coupler assembly in the test chamber with the microphone of the aid at the reference point o

110 FONIX 7000 Hearing Aid Analyzer3. For ANSI 87 and ANSI 96, set AGC aids to achieve the greatest possible compression or as otherwise specified b

Automated Test Sequences 1112. Push [START] to continue the test.3A. If you chose to perform a telecoil measurement, do the following steps when the

4 FONIX 7000 Hearing Aid AnalyzerHA-2, 2-cc Coupler Dimensions per ANSI S3.7 for testing behind-the-ear aids, eyeglass aids, and body aids.Coupler M

112 FONIX 7000 Hearing Aid Analyzer5.1.5 Running an ANSI 87 TestAfter leveling the sound chamber as described in Section 5.1.1, setting up the aid a

Automated Test Sequences 113Figure 5.1.6—ANSI 03 test results, Frequency Response Screen 9. RTG Measured: Measured reference test gain10. EQ Inp Noi

114 FONIX 7000 Hearing Aid Analyzer18. I/O curve selection box: the key to the I/O graph, listing which frequencies go with which curve.19. Attack an

Automated Test Sequences 1151. Run the ANSI test sequence.2. Press [F6].3. Use [∨] to select Store Crvs Coup, if necessary. 4. Press [>] to st

116 FONIX 7000 Hearing Aid Analyzer• OSPL90 Sweep Meas Delay—The delay between frequencies in the OSPL90 sweep.• Res Crv Sweep Start Delay—The dela

Automated Test Sequences 1175.2 ANSI S3.42-1992 (ANSI 92)The ANSI Option includes a test sequence based on the ANSI S3.42-1992 stan-dard. This stand

118 FONIX 7000 Hearing Aid AnalyzerFor some aids, the analyzer will pause the test and tell you to turn the aid down to reference test gain. Adjust t

Automated Test Sequences 119Figure 5.2.3—ANSI 92 test results5.2.4 Viewing ANSI measurements in the Coupler screenIt’s possible to copy ANSI respons

120 FONIX 7000 Hearing Aid Analyzer5.2.5 Explaining the Menu SettingsThere are only a couple of menu settings in the local menu of the ANSI 92 scree

Automated Test Sequences 1215. Level the sound chamber, if necessary (see Section 5.1.1).6. Plug the battery simulator into the jack near the batte

Introduction and Setup 5Microphone Adapter 14 mm to 1" (25.4) mm adapter for coupling the M1950E microphone and reference microphone to a 1-inch

122 FONIX 7000 Hearing Aid Analyzer7. Reference test gain measured (actual)8. Reference frequency9. Total harmonic distortion10. Equivalent input

Automated Test Sequences 123• Misc. Start Delay—The delay after the first tone is presented and before the first measurement is taken in the HFA/SPA

124 FONIX 7000 Hearing Aid Analyzer5.4.2 Viewing JIS ResultsFigure 5.4.2See Figure 5.4.2 for the following explanation of test results.1. OSPL90 re

Automated Test Sequences 1255.4.3 Viewing JIS measurements in the Coupler screenIt is possible to copy JIS response curves to the Coupler screen whe

126 FONIX 7000 Hearing Aid AnalyzerJIS Settings• Equiv Noise Test—Status of the EIN measurement. Turns it ON or OFF. Misc. Settings• Print Label—St

Chapter 6 127Real-Ear Measurements6.1 IntroductionThe Real-Ear Option gives you the capability to make probe microphone mea-surements inside your cl

128 FONIX 7000 Hearing Aid AnalyzerThese screens are:• Audiogram Entry screen [F1]• Target screen [F2]• Insertion Gain screen [F3]• SPL screen [F

Real-Ear Measurements 12912"Speaker(45 degrees)Reference MicProbe Mic12"Reference MicProbe MicTop ViewFront ViewSpeaker(45 degrees)Figure 6

130 FONIX 7000 Hearing Aid Analyzer6.2.3 Inserting the probe tubeThere are several different methods used for properly inserting the probe tube. Here

Real-Ear Measurements 131WARNINGChoose OUTPUT LIMITING carefully (see procedure below). You don’t want to damage your clients’ hearing or to cau

6 FONIX 7000 Hearing Aid AnalyzerLoudspeaker Swing Arm This swing arm may be substituted for the speaker floor stand & shelf. It is a convenien

132 FONIX 7000 Hearing Aid AnalyzerSANITATION NOTICEDO NOT REUSE PROBE TUBES.Use a new probe tube for each ear to prevent the possible spr

Real-Ear Measurements 1333. Press [F5] to select the Composite signal as the source type.4. Press [START] to start a measurement. 5. Insert the pr

134 FONIX 7000 Hearing Aid AnalyzerFigure 6.2.4—Leveling the sound field speaker 1. Follow the instructions found in Sections 6.2.1 and 6.2.2 to pos

Real-Ear Measurements 135If the instrument didn’t successfully level, there are several things you can try. • Check the position of the sound field

136 FONIX 7000 Hearing Aid Analyzer4. Make sure HTL is selected above F2. You should see a cursor in the HTL column for the selected ear in the midd

Real-Ear Measurements 1376.3.2 Deleting Audiometric InformationIf you make a mistake, it’s often useful to be able to delete all or part of the input

138 FONIX 7000 Hearing Aid Analyzer6.3.4 Entering Bone DataThe NAL-NL1 target uses bone data in its calculations. If the patient’s bone thresholds ar

Real-Ear Measurements 139To perform the coupler measurement:1. Insert the 50 ohm insert earphone into the jack on the back of the 7000 test system l

140 FONIX 7000 Hearing Aid Analyzer5. Press [F1] from the Real-Ear Navigation screen to enter the Audiogram Entry screen.6. Press [MENU] from the A

Real-Ear Measurements 141Figure 6.3.5E—Taking an RECD Measurement6.3.6 Modifying a TargetOnce you input an audiogram in the Audiogram Entry screen, a

Introduction and Setup 7Monitor Headset Plugs into the remote module, and allows the user to listen to the signal being measured by the probe micro-p

142 FONIX 7000 Hearing Aid Analyzer• REDD: The real-ear to dial difference (only selectable when REDD is set to CUSTOM)• TARG IG: The mid-level tar

Real-Ear Measurements 1436.3.7 Entering an REDD transformThe REDD transform affects how dB HL values are converted to dB SPL. To enter a measured RED

144 FONIX 7000 Hearing Aid AnalyzerIn other words, the bottom graph of the insertion gain screen shows the differ-ence between the sound field measur

Real-Ear Measurements 1456.4.2 Measuring in the Real-ear SPL screenIn the past ten years, the SPL method of performing real-ear measurement has incre

146 FONIX 7000 Hearing Aid Analyzerthis section apply to measurements performed in both screens. Any differences between operations in the two screen

Real-Ear Measurements 1475. Enter the Insertion Gain or Real-ear SPL screen by using [F3] or [F4] in the Real-ear Navigation screen, respectively.6.

148 FONIX 7000 Hearing Aid Analyzerthe local menu. The average unaided response will now be displayed on the measurement graph.To auto-adjust the una

Real-Ear Measurements 149pop-up selection menu. Use the up-down arrow keys to make the desired selection. Press the right arrow key to complete the s

150 FONIX 7000 Hearing Aid Analyzeranother measurement curve. It is recommended to perform real-ear measure-ments as 50, 65, 80, and 90 dB SPL. For t

Real-Ear Measurements 1516.4.6 Using Semi-Auto and Fully-Auto ModeThe Real-ear Insertion Gain and Real-ear SPL screens have basic implementa-tions of

8 FONIX 7000 Hearing Aid AnalyzerCIC Coupler Non-standard (0.4 cc) coupler used for realistic testing of CIC hearing aids. This coupler is always use

152 FONIX 7000 Hearing Aid Analyzer1. Enter the Real-ear Insertion Gain or Real-ear SPL screen.2. Press [MENU] to enter the local menu.3. Select S

Real-Ear Measurements 153To view curve data in the Real-ear Insertion Gain screen:1. Enter the Real-ear Insertion Gain:2. Press [MENU] to enter the

154 FONIX 7000 Hearing Aid Analyzer4. Use [<, >] to select DATA.5. Press [EXIT] to return to the Real-ear SPL screen. The numerical data dis-

Real-Ear Measurements 155• From 3000 Hz–8000 Hz, measured data points from seven consecutive frequencies 100 Hz apart are averaged to get the curve

156 FONIX 7000 Hearing Aid Analyzer6.4.12 Using Output LimitingWhen performing real-ear measurements, it is very important not to expose your client

Real-Ear Measurements 1577. Press [∨] repeatedly until the chosen source is OFF. 8. Press [START] to start the measurement.9. Instruct your client

158 FONIX 7000 Hearing Aid Analyzer6.5.2 Choosing a speech weightingBy default, the Digital Speech (and Composite) signal uses the ANSI S3.42 speech

Real-Ear Measurements 1592. Select the Digital Speech signal source with [F5].3. Press [MENU] to enter the local menu.4. Select Bias Tone under So

160 FONIX 7000 Hearing Aid Analyzer5. Press [START] to measure the frequency response of the hearing aid. Press [STOP] when the measurement has stab

Real-Ear Measurements 1614. Press [LEVEL] to level the sound field speaker.5. Use [F2] to select REUG 1. (Press [F2] to open the pop-up selection m

Introduction and Setup 9Open Ear Coupler Non-standard coupler used for realistic testing of open ear hearing aids.#5 battery pill Provides battery c

162 FONIX 7000 Hearing Aid Analyzer14. Press [START] to start the frequency response measurement. (The “reverse” measurement will reappear when the m

Real-Ear Measurements 1637. Test as usual. With the reference microphone disabled, it is even more criti-cal than usual that the patient not move af

164 FONIX 7000 Hearing Aid AnalyzerFigure 6.8—Visible Speech screen before a measurement is taken. The shaded regions are below and above the patient

Real-Ear Measurements 1656.8.2 Viewing the Real-time Visible Speech DisplayDuring the Visible Speech test, the analyzer displays four changing measur

166 FONIX 7000 Hearing Aid AnalyzerFigure 6.8.3—Completed Visible Speech test.6.8.4 Measuring multiple envelopesThe clinician can measure up to three

Real-Ear Measurements 1676.9 CROS/BICROS AidsWhen performing real-ear measurements on a Body aid, CROS, or Bi-CROS aid, we suggest the following setu

168 FONIX 7000 Hearing Aid Analyzer6.9.1 Measuring the Head-Baffle EffectThe measurements described in this section are for both CROS and BI-CROS hea

Real-Ear Measurements 1696.9.2 Measuring the Overcoming of the Head-Baffle EffectThis section describes how to measure how well the hearing aid overc

170 FONIX 7000 Hearing Aid Analyzer6.9.2.2 BI-CROSUnaided—Measurement of “better” ear canal (baffled by head)Set up the 7000 test system as follows.•

Real-Ear Measurements 1716.9.3.1 CROSUnaided—Measurement of “good” earSet up the 7000 test system as follows.• Reference microphone ON• Sound field L

10 FONIX 7000 Hearing Aid AnalyzerSound Chamber Spring Damper Factory-installed.or Assembly Kit. This spring assembly fits onto the back of the soun

172 FONIX 7000 Hearing Aid Analyzer6.9.4 Measuring Insertion Loss to the “Good” Ear (CROS)The method for measuring insertion loss in the patient’s “g

Appendix A 173 SpecificationsACOUSTIC DRIVE SIGNALFrequencies: Composite: 200 to 8000 Hz in 100 Hz intervals SINE: 200 to 8000 Hz 1/12 oct, nearest

174 FONIX 7000 Hearing Aid AnalyzerSPECTRUM MODE AVERAGING Spectral : off, 2,4,8 and 16.HARMONIC DISTORTION ANALYZERType: Selectable for 2nd, 3rd,

Specifications 175ELECTRONICS MODULEColor: Blue module case, white front panel and gray bezelSize: 17.4"W x 6.5"H x 14.6"D (44.2

176 FONIX 7000 Hearing Aid AnalyzerEar Level Adapter: (044-1007-00) Per requirements of ANSI S3.22-1996 for adapting ear level aids to the HA-2 c

Appendix B 177 CalibrationB.1 Calibrating the microphonesTo calibrate the 7000 Test System’s microphones, you will need a sound level calibrator such

178 FONIX 7000 Hearing Aid Analyzer6. If necessary, adjust the gain of the 1950E microphone by using the flathead screwdriver to adjust the “gain” p

Calibration 179Figure B.1.C—Adjusting the reference pot with a Phillips-head screwdriver.5. Remove the reference microphone from the adapter and tur

180 FONIX 7000 Hearing Aid Analyzer10. Turn on the sound level calibrator and look at the “Probe Mic” level in the Microphone Calibration window. It

Calibration 181Figre B.2—Calibrating the insert earphone

Introduction and Setup 111.5 Layout, Controls, and SafetyThis section describes the basic layout of the front and rear panel of the 7000 test system,

182 FONIX 7000 Hearing Aid Analyzer

Appendix C 183 Troubleshooting GuideThese are the most common problems that typically cause instrument failure. Please check these troubleshooting su

184 FONIX 7000 Hearing Aid AnalyzerCoupler Problems:1. HA-2 Coupler (BTE) adapter tubing is missing, loose, or cracked Replace with #13 thickwall tu

Appendix D 185 The FONIX CIC FeatureBackgroundZwislocki built an ear simulator coupler years ago to better approximate the real ear’s impedance varia

186 FONIX 7000 Hearing Aid Analyzera good hearing aid fitting. It also felt that the approach taken in the use of the MZ coupler has been well accept

The FONIX CIC Feature 187Knowing the physical volume of the occluded ear canal and its frequency response variations, it is possible to calculate the

188 FONIX 7000 Hearing Aid AnalyzerCIC CORRECTION FACTORSdB Hz dB Hz dB Hz dB Hz-8.7 200 -0.95 2200 3.2 4200 4.54 6200-8.6 300 -0.5 2300 3

Appendix E 189 Fitting Formula TablesThe conversions used by the FONIX 7000 Test System to convert audiograms to target gain curves are the following

190 FONIX 7000 Hearing Aid Analyzer POGO Prescription of Gain/Output (POGO) for Hearing Aidsby: Geary A. McCandless, PhD, & Poul Erik Lyregaard

Fitting Formula Tables 1911/3, 1/2, 2/3 GainThe 1/3-2/3 Insertion Gain Hearing Aid Selection Guide by: Robert LibbyHearing Instruments vol 37 #3, 19

12 FONIX 7000 Hearing Aid Analyzer• To navigate from screen to screen• To toggle a selection• To pop-up up a selection menuFor a more complete des

192 FONIX 7000 Hearing Aid Analyzer

Appendix F 193 Probe SPL Mode DescriptionThe Target IG is converted to the Target SPL in the following steps:(Conversion tables appear on the followi

194 FONIX 7000 Hearing Aid AnalyzerTABLE 1 Average Real-Ear Unaided Response (REUR) FREQ GAIN FREQ GAIN FREQ GAIN FREQ GAIN(Hz) dB (Hz) dB (Hz) d

Probe SPL Mode Description 195 TABLE 3 HL to real-ear SPL (or SPL to HL) conversion table from ANSI S3.6-1989 Table G.1 FREQ (Hz) dB 250 19.0

196 FONIX 7000 Hearing Aid Analyzer

Appendix G 197 Glossary of TermsAGC Automatic Gain Control (or Automatic Volume Control). A feature on a hearing aid that automatically adjusts the

198 FONIX 7000 Hearing Aid AnalyzerBICROS A CROS aid that has two microphones, one at each ear, sending both signals to one ear.BLOOMING A

Glossary of Terms for the FONIX 7000 199DATA In FONIX analyzers, the word “data” refers to displaying curve information as a table of numbers.

200 FONIX 7000 Hearing Aid AnalyzerGIFROC The inverse of “CORFIG.” GIFROC is the transformation that, when added to a coupler response, will give th

Glossary of Terms for the FONIX 7000 201INTER- Distortion generated by the faulty mixture of different input frequencies. MODULATION This is

Introduction and Setup 131.5.2 Rear Panel LayoutThe rear panel of the 7000 test system contains most of the external connec-tions for the analyzer. S

202 FONIX 7000 Hearing Aid AnalyzerPOWER The output of an aid, in dB SPL.PROBE A miniature microphone with a thin, flexible tube that is

Glossary of Terms for the FONIX 7000 203RMS Root Mean Square. An overall measurement of the signal going in or coming out of a hearing aid. Wh

204 FONIX 7000 Hearing Aid AnalyzerWARBLE TONE A pure tone with slight, but rapid, frequency variations.WEIGHTED A measure of the amplification

205IndexAAdaptive AGC 36AGC frequency 116AIDED DATA 153Aided response 148Aid type 95ANSI 84, 158ANSI 03 107, 108, 110ANSI 92 117ANSI Option 3

206 FONIX 7000 Hearing Aid AnalyzerEEar-level adapter 4, 59Ear hook 7, 129Enhanced DSP 97Equiv Noise Test 115, 122, 126EXIT 12, 28Eyeglass 65FF

Index 207Noise reduction 35, 38, 88Noise Red (Comp) 95Noise Red (Tone) 95, 115, 122, 125Noise suppression 84, 86, 88, 159NORMAL 33, 69OOccluded

208 FONIX 7000 Hearing Aid AnalyzerSpecifications 173Speech mapping. See live speech mappingSpeech weighting 158SPL 145, 147, 149, 150, 193START

14 FONIX 7000 Hearing Aid Analyzer11. PROBE: Connects the main module to the remote module (used for real-ear measurements). KEYBD: Not currently

Introduction and Setup 15Connection of peripheral equipment to the 7000Compliance with IEC 60601-1-1 Safety requirements for medical electrical sys-t

16 FONIX 7000 Hearing Aid AnalyzerOtherwise, please report all safety related concerns to the Frye factory: Frye Electronics, Inc. 9826 SW Tigard

Introduction and Setup 171.6.2 Locating and arranging the 7000 test systemLocate the 7000 test system in a moderately quiet area, such as a private o

18 FONIX 7000 Hearing Aid AnalyzerPRINTERSOUND CHAMBEREARPHONESPKRMONITORRS232AUXKEYBDMICROPHONEGAINSCOPEPROBEFONIX 7000 Serial No. 1234Manufactured

Introduction and Setup 194. Depending on whether you have a floor stand or a swing arm, either (1) Unfold and extend the floor stand to the desired

20 FONIX 7000 Hearing Aid AnalyzerThe 7000 microphones should be wiped with a dry cloth. Excess moisture may damage the microphones.Solvents and abra

Introduction and Setup 21Figure 1.7.3A—Serial number locationThe software version of your 7000 test system can be found on the Opening screen. See Fi

ContentsChapter 1: Introduction & Setup1.1 History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

22 FONIX 7000 Hearing Aid Analyzer1.7.4 Contacting the FactoryIf you have any questions regarding your instrument, have your serial number and softwa

Chapter 2 23 General OperationThis chapter describes the general operation of the 7000 test system, including basic operation of the buttons, screen

24 FONIX 7000 Hearing Aid AnalyzerThere are three basic uses of the function keys:• To navigate from screen to screen• To toggle a selection• To p

General Operation 252.1.2 Navigating through the screensThe function keys are used to move from screen to screen. Here is a flow chart of all the ava

26 FONIX 7000 Hearing Aid Analyzer2.1.3 Using the pop-up help windowsEach operational screen on the 7000 test system has a local help window designed

General Operation 272.1.4 Using the local menusPressing the [MENU] button will pop up a local menu that, like the help win-dow, will be overlaid on y

28 FONIX 7000 Hearing Aid Analyzer2.1.5 Using the EXIT and RESET buttonsThe [EXIT] and [RESET] buttons can be used to exit from any screen, menu, or

General Operation 292.2.1 Saving and loading default settingsAll of the settings in the Setup menu (described in Section 2.2.4) can be saved as defau

30 FONIX 7000 Hearing Aid Analyzer2.2.3 Setting the user modeThere are two different user modes available on the 7000 test system: Beginner and Exper

General Operation 31START SCREEN: The screen shown when the analyzer is powered on or the [RESET] button is pressed. COUPLER sets this screen to the

2.3.1.2 Noise reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

32 FONIX 7000 Hearing Aid AnalyzerNOISE RED (TONE): Pure-tone noise reduction for real-ear measurements. See Section 2.3.1.2.NOISE RED (COMP): Compos

General Operation 33harmonic distortion measurement should be ignored. Choose ON to apply this rule. Choose OFF to ignore this rule.ANSI OPTION: Modi

34 FONIX 7000 Hearing Aid Analyzer2.3.1.1 Pure-tone settings There are several different settings available for pure-tone sweeps. You can change all

General Operation 35HFA (High Frequency Average) 1000, 1600, 2500 SPA (Special Purpose Average) 800, 1250, 2000 SPA 1250, 2000, 3150 SPA 1600,

36 FONIX 7000 Hearing Aid AnalyzerIn addition to the delays, the aid type will also have an effect on the way some measurements are made. With a sele

General Operation 37tone sweeps with speech-weighted Composite or Digital Speech signals. For this reason, we have made it possible to “weight” the r

38 FONIX 7000 Hearing Aid AnalyzerA significant advantage of using a composite signal is that each frequency pres-ent in the signal can be individual

General Operation 39Figure 2.3.2.2—Example of IM distortion2.3.2.3 Composite filterThere are two main types of composite filters (also known as “spee

40 FONIX 7000 Hearing Aid AnalyzerFigure 2.3.2.3—Comparison of the ICRA shape and the ANSI shape2.3.2.4 Composite typeThere are two types of the trad

General Operation 41Chirp Composite signal is the standard composite signal used on the FP40 and FP35 portable hearing aid test systems. Although the

3.4.2 Running a Test Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

42 FONIX 7000 Hearing Aid Analyzer2.3.2.6 Digital Speech technical detailsThe digital speech signal works by turning the composite signal on for a se

General Operation 43To set the default printer, and/or to set the external printer language and color choice, use the Setup menu:1. Press [MENU] fro

44 FONIX 7000 Hearing Aid AnalyzerIf you want to include a label on all printouts by default:1. Press [MENU] from the Opening screen to enter the Se

General Operation 45• Init failed 0: No memory available for the converted screen buffer• Init failed 1: No memory available for the label bitmap•

46 FONIX 7000 Hearing Aid AnalyzerFigure 2.4.4A—The internal printerStep II: Loading paper into the printer1. Turn on the instrument.2. Place the H

General Operation 47Figure 2.4.4C—Loading paper into the printer4. While holding the paper in place behind the rubber roller, manually turn the thum

48 FONIX 7000 Hearing Aid Analyzer8. Tear off excess paper by pulling the paper against the thermal head at approximately a 45º angle.9. Close the

General Operation 492.4.7 Putting multiple screens on a pageWhen printing with an external printer, it is possible to save paper by putting two scree

50 FONIX 7000 Hearing Aid AnalyzerCurve Name: This identifies the name of each curve. The first letter is derived from its measurement type—coupler (

General Operation 51RMS Out: The root-mean-square of the measured curve.Correction Factors (COR): The coupler correction factors used to make the mea

5.1.7 Testing Digital Hearing Aids. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

52 FONIX 7000 Hearing Aid AnalyzerFigure 2.5.2—Data display of a composite measurement2.6 Computer ConnectionThe 7000 test system is equipped with an

General Operation 53Figure 2.7—Remote Module2.8 LevelingLeveling is the process by which the response of the sound chamber or sound field is measured

54 FONIX 7000 Hearing Aid Analyzer• WEAK_LEVELED: Tolerances are the same as SEMI-LEVELED but the max-imum output for the speaker is less than 100 d

Chapter 3 55 Basic Sound Chamber TestsIn the Coupler screen, you can view measurement curves in dB SPL or dB Gain, and run them with Composite, Digit

56 FONIX 7000 Hearing Aid AnalyzerRefer to Figure 3.1.1 for the following explanation of the graphical display:1. Type of display. This will be eith

Basic Sound Chamber Tests 574. Signal type, speech weighting, leveling status, and bias status (Digital Speech only).5. Selected noise reduction.6.

58 FONIX 7000 Hearing Aid AnalyzerFigure 3.2.1—Leveling the sound chamberNote: See Section 5.1.1 for the ANSI standardized leveling procedures.3.2.2

Basic Sound Chamber Tests 593.3.1 Explaining the Coupler Types The HA-1 direct access coupler is used to test in-the-ear and canal aids, and aids wit

60 FONIX 7000 Hearing Aid Analyzerto duplicate that used by the manufacturer to obtain the original data. For ANSI tests, use #13 thick-walled tubing

Basic Sound Chamber Tests 614. Seal any vent on the aid with a small kernel of Fun-Tak.5. Complete the acoustical sealing of the aid to the coupler b

6.4.6 Using Semi-Auto and Fully-Auto Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

62 FONIX 7000 Hearing Aid Analyzer3.3.3 Behind-The-Ear (BTE) Aids1. Insert the coupler microphone into the HA-2 2-cc coupler. 2. Couple the aid to

Basic Sound Chamber Tests 63We have also developed a non-standard coupler for open-ear hearing aids. It has two design purposes: 1) To make an conven

64 FONIX 7000 Hearing Aid AnalyzerFigure 3.3.4D—Comparison of couplers with open-ear hearing aid. Curve 1 was measured using the Open Ear coupler, Cu

Basic Sound Chamber Tests 65 Figure 3.3.5A—Coupler setup Figure 3.3.5B—Body Aid in test chamber 3.3.6 Eyeglass Aids1. Follow the manufacturer’s

66 FONIX 7000 Hearing Aid AnalyzerFigure 3.3.6—Eyeglass Aid Set-up3.3.7 Wireless CROS and BICROS AidsThe key to testing these aids is to get the prop

Basic Sound Chamber Tests 67Figure 3.3.7—Testing Wireless CROS Hearing Aids4. Place the receiver on top of the lid of the test chamber. The total de

68 FONIX 7000 Hearing Aid AnalyzerAdditional Notes for Testing Wireless Instruments1. There must not be any metal objects between the transmitter an

Basic Sound Chamber Tests 693.4.1 Signal TypesThe following signal types are available:DIGITAL SPEECH—A randomly interrupted composite signal designe

70 FONIX 7000 Hearing Aid AnalyzerFigure 3.4.2—Pure-tone measurement3.4.3 ExampleFollowing the instructions above, run 4 Gain curves using amplitudes

Basic Sound Chamber Tests 716. Use [F2] to select CRV 2.7. Use [∧] to select a source level of 60 dB SPL.8. Press [START] to run the second measur

72 FONIX 7000 Hearing Aid AnalyzerFigure 3.4.3B—Family of curves. Notice how the curves show less gain as the amplitude increases. This aid shows a g

Basic Sound Chamber Tests 733.4.5 Running a Single Frequency MeasurementAt times, you may want to find out what the frequency response of the hearing

74 FONIX 7000 Hearing Aid Analyzer3. Use [<, >] to choose AVERAGE.4. Use [∨, ∧] to select Avg Freqs under Aid Settings.5. Use [<, >] t

Basic Sound Chamber Tests 753RD: Distortion present at the third harmonics, or three times the presented frequency.TOTAL: Distortion present at the s

76 FONIX 7000 Hearing Aid Analyzer3.4.8 Intermodulation DistortionThe composite signal is helpful for identifying intermodulation distortion (IM), a

Basic Sound Chamber Tests 773.4.9 Battery Current DrainYou can measure the battery current drain in the Coupler screen if you use battery pills (inst

78 FONIX 7000 Hearing Aid Analyzer3.4.10 TelecoilTelecoil measurements can be performed in the Coupler screen using any of the source signals availab

Basic Sound Chamber Tests 798. Use [∧, ∨] to change the intensity of the magnetic field. The choices are: OFF, 1.00, 1.78, 3.16, 5.62, 10.0, 17.8, 3

80 FONIX 7000 Hearing Aid Analyzeris in a vertical position. If necessary, use Fun Tak to help hold the aid in that position. See Figure 3.4.10B.5.

Basic Sound Chamber Tests 81Speaker PlacementThe speaker in the 7000 sound chamber is positioned on the right side of the chamber at a 45º angle, as

Chapter 1 1Introduction & SetupWelcome to the newest innovation in hearing aid testing! The 7000 Test System is the long-awaited successor to the

82 FONIX 7000 Hearing Aid AnalyzerFigure 3.4.11B—Forward directional measurement.Reverse measurementNext, open the sound chamber and position the hea

Basic Sound Chamber Tests 83Figure 3.4.11C—Reverse directional measurementFigure 3.4.11D—Directional measurement screenshot

84 FONIX 7000 Hearing Aid Analyzer3.5 Digital hearing aidsAll digital aids can be tested, but some of the high-end models require a little more thoug

Basic Sound Chamber Tests 855. Use [F5] to choose the DIG SPEECH signal source. It will now have the ICRA speech weighting. See Figure 3.5.2 for a c

86 FONIX 7000 Hearing Aid AnalyzerFigure 3.5.3—Using the bias signal with Digital Speech. CRV 1-3 have bias signals at 500 Hz, 1000 Hz, and 4000 Hz r

Basic Sound Chamber Tests 872. Use [F2] to select CRV 1. (Press [F2]. Use [∨, ∧] to select CRV 1. Use [>] to complete the selection and close the

88 FONIX 7000 Hearing Aid Analyzer3.5.5 Understanding TerminologyWith the new testing terminology of hearing aid analyzers combined with the new tech

Basic Sound Chamber Tests 898. Press [START] to perform the measurement. You should see CIC appear in the Curve Characteristics box in the “Cor” col

90 FONIX 7000 Hearing Aid AnalyzerTo use the OES Option:1. Attach the MZ coupler to the aid. See Table 3.7 for details on choosing the correct MZ co

Basic Sound Chamber Tests 91Figure 3.7—Comparison of the responses with the MZ and HA-2 couplers. Curve 2 was measured with an MZ coupler and OES co