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Axiom

User's Guide Version 1.6



August 2013

Summary of Contents for axiom

Page 1: ...Axiom User s Guide Version 1 6 August 2013...

Page 2: ...king 21 Networking requirements 21 Networking setup 21 Remote Operation 23 Changing the Remote Operation port 24 NOAH Service Port 24 Changing the NOAH service port 25 Testing the NOAH service port 25...

Page 3: ...check for probe module 51 Max TM SPL setup 52 Positioning the client 53 Positioning the probe tube 53 13 On Ear Measures Screen Setup 55 SPL or HL scale 55 Hide or show on ear curves 55 14 On Ear Ins...

Page 4: ...Speechmap Technical Details 88 Speechmap stimuli 88 Stimulus levels 89 Microphone location effects 89 Speech signal analysis 90 20 Troubleshooting 91 Self test failures 91 Initialize Function 91 Test...

Page 5: ...nal from the loudspeaker and a standardized earphone coupler connected to a measuring microphone for the purpose of measuring the sound level produced in the standard coupler by a hearing aid b signal...

Page 6: ...ce of flammable anesthetic mixtures with air or with oxygen or nitrous oxide WARNING No modification of this equipment is permitted This symbol on the product is a WARNING that failure to follow instr...

Page 7: ...n nearby electronic equipment RF emissions CISPR 11 Class A Harmonic emissions IEC 61000 3 2 Class A Voltage fluctuations flicker emissions IEC 61000 3 3 Complies The Axiom is suitable for use in all...

Page 8: ...rn Ontario UWO which is solely responsible for its content We acknowledge the support received from past and present staff at the National Centre for Audiology at UWO in implementing the DSL method CA...

Page 9: ...Axiom User s Guide Version 1 6 August 2013 EC Declaration of Conformity 9...

Page 10: ...isk Assessment to identify any undesirable side effects that a user could be exposed to during the use of the Axiom and incorporated numerous risk reduction design elements into the Axiom to minimize...

Page 11: ...01 1 OR b be kept at least 6 feet 1 8m from the patient Ear Infection Probe tubes or RECD foam tips should not be re used on another patient There is a possibility of transferring an ear infection to...

Page 12: ...to be mounted on a desk it should be at the edge facing outward A room with sound absorbing floor ceiling and walls is recommended 3 Turn the Axiom over and connect the on ear probe microphones and t...

Page 13: ...microphone and coupler microphone in to their respective connectors in the test chamber 7 Connect the speaker to the speaker connector on the rear connector panel 8 Connect a video monitor HDMI or DV...

Page 14: ...d ISO safety standards for monitors AND a be operated from an isolating transformer complying with UL IEC 6061 1 OR b be kept at least 6 feet 1 8 m from the patient 10 Connect a USB mouse included to...

Page 15: ...d Ensure that all safety and usage recommendations on cleaning product packages are followed Microphone care Coupler microphone 1 DO NOT twist the cable when attaching a coupler to the coupler microph...

Page 16: ...from the outlet Input device operation The Axiom is operated by using a USB mouse included or a QWERTY keyboard not included to select icons and menu items operate on screen buttons and to enter audio...

Page 17: ...data and the ear left right is shown below the barcode Only data for the displayed ear are imported Barcodes may be scanned in any order and it does not matter if the barcode is upside down 1 Select S...

Page 18: ...d by left clicking the mouse on either panel or by pressing the F5 key on a QWERTY keyboard The side sliders on each panel may be used to scroll through the Help index or long Help pages This may also...

Page 19: ...To change the language used on the screen left click on the Language window and select from available languages currently English only 4 To change the idle time before the screen saver blanks the scr...

Page 20: ...User s Guide Version 1 6 August 2013 2 Left click on Save option on the Setup menu 3 Left click on the Yes No windows to enable disable the save options indicated 4 To exit the Setup menu left click...

Page 21: ...rmined by the type of wireless connection provided and distance from the wireless router The standard 802 11a b g or n wireless networks can be connected to the Axiom The current supported forms of wi...

Page 22: ...uter domain address and port assignments will be reported 4 Connecting to a wireless WLAN network 1 Select the Wireless option from the Network drop down 2 The Axiom will scan for wireless networks 3...

Page 23: ...ect Auto and click on Test 6 If the test is successful your computer domain address and port assignments will be reported Note for network administrators To manually change networking settings uncheck...

Page 24: ...rk service The Axiom provides the Remote Operation service on a TCP port The Windows computer running the module must be configured to access the same TCP port which is 5900 by default Some Windows an...

Page 25: ...e NOAH service port requires restarting the Product software Changing the NOAH service port 1 Press Change next to the NOAH service port 2 Select the appropriate five digits to enter the desired port...

Page 26: ...Axiom User s Guide Version 1 6 August 2013 2 If the communication is successful the web browser will display NOAH data formatted in XML noah Example XML noah 26...

Page 27: ...ns On Windows 7 Vista go to Control Panel Network and Sharing Center then select Change Adapter Settings on the left hand panel 2 Right click on Local Area Connection and choose Properties Ensure that...

Page 28: ...Axiom User s Guide Version 1 6 August 2013 28...

Page 29: ...D where applicable may be added to printouts of Speechmap and Insertion gain tests Tabular data where applicable may be appended to printouts Lines for hand written notes or typed comments may also be...

Page 30: ...pecific printer models 6 Click If Other HP was selected this will summon the HP printer selection menu Select a printer model from the drop down list and click 7 Click to exit the Setup menu Printing...

Page 31: ...t or Other HP for a list of supported specific printer models Check Black only for black printouts on a color printer 5 Connect a computer keyboard to a USB port on the Axiom and fill in the boxes wit...

Page 32: ...se data choices or the power is turned off Setup data will be retained even after the power is turned off The Axiom database may be stored and restored via xml files on a USB drive or a networked PC s...

Page 33: ...o file on the list 3 Click the Client ID list button This will display a list of Client IDs with the first entry highlighted 4 To add a session to an existing file 1 Use the mouse or the arrow keys on...

Page 34: ...oard The highlight will move to the closest match as you type 5 When the desired file name is highlighted left click on the Client ID button you can always left click on any file in the list to select...

Page 35: ...be changed to show results in either graphical or tabular format To change the data format click on the Format button Test box screen For most tests two completely separate sets of test results label...

Page 36: ...S3 22 1996 facts and ANSI S3 22 2003 facts To select the standard to be used 1 Click on and then click on ANSI 2 Click on the version of the ANSI standard you wish to use 3 Click on to save your selec...

Page 37: ...comparison with the factory calibrated coupler microphone It may be performed as often as desired but will be invalidated at 12 am the following day or at 12 am the following Monday depending on the...

Page 38: ...on Calibrate See Test box calibration facts It is recommended that you print a copy of the initial calibration curve and compare it with your daily or weekly curve Any change in this curve indicates a...

Page 39: ...y important that they be firmly tightened to ensure a good acoustic seal Avoid twisting the coupler microphone cable turn the coupler not the microphone or unplug the microphone while tightening the c...

Page 40: ...upling the hearing instrument 2 Place the instrument and coupler in the test chamber so that the front microphone opening of the instrument is on the crossbar within the test zone 3 Position the test...

Page 41: ...ull on gain the Linear and AGC test sequences provide a curve of OSPL90 Output Sound Pressure Level for a 90 dB input SPL the HFA or SPA and peak value of this curve the frequency of the peak and the...

Page 42: ...nstrument for testing 2 Click then click Linear or AGC on the Test box menu 3 Click Start test and follow the test setup instructions which are presented 4 Turn the instrument ON 5 Set the gain contro...

Page 43: ...s usually but not always measured at 60 dB SPL and the frequency response is run at 60 dB SPL for linear aids or at 50 dB SPL for AGC aids In 2003 tests Full on average gain 1 is measured with a 50 dB...

Page 44: ...or testing 3 Turn the instrument ON 4 Click on button 1 2 3 or 4 in the Test column 5 Select the Stimulus window then either Pink noise or Swept from the drop down list 6 Click on the Level window for...

Page 45: ...tave bands and displayed at 1 3rd octave frequencies Pressing Continue causes the swept filter analysis to be performed in 1 12th octave bands and displayed at 1 12th octave frequencies Manual control...

Page 46: ...ed by 1 12th octave A weighted or C weighted filters A and C weighted measurements are limited to frequencies above 100 Hz and the averaging time and update rate are 384 ms 1 Click on and select Manua...

Page 47: ...r s Guide Version 1 6 August 2013 NOTE Microphone extension cables VA 131 VA 133 are available from Audioscan Standard audio extension cables should not be used They will substantially increase noise...

Page 48: ...e considered to be due entirely to outer hair cell damage Any loss greater than this is considered inner hair cell loss This SLS does not simulate broadening of the auditory filters or other distortio...

Page 49: ...on one of the Hearing buttons to simulate the Entered loss 1 2 Entered loss or Normal hearing 9 Click on or to stop the demonstration and freeze the stimulus speech banana on the screen 10 Click on t...

Page 50: ...reference microphone and compensates all subsequent probe tube measurements for this difference It may be performed as often as desired but will be invalidated at 12 am the following day or at 12 am t...

Page 51: ...tion curve for the probe module is a comparison of the response of the probe microphone with tube to the response of the on ear reference microphone Any change in the curve indicates a change in one o...

Page 52: ...level meter next to the on ear reference microphone as shown Set the sound level meter to C weighting and slow 7 The sound level meter should read 70 2 dB 8 Repeat with the frequency at 250 Hz 9 To st...

Page 53: ...e client and the sound field speaker at least 1 5 m 5 feet away from any hard surfaces 2 Position the client directly in front of and facing the sound field speaker at a distance of 45 to 90 cm 18 to...

Page 54: ...Axiom User s Guide Version 1 6 August 2013 Probe tube insertion The blue lanyard holds the tube in place and the depth marker is at the intertragal notch 54...

Page 55: ...urves Hide or show insertion gain curves To hide or show insertion gain curves displayed on the insertion gain screen 1 Click on the Hide Show button located on the lower right side of the insertion g...

Page 56: ...Axiom User s Guide Version 1 6 August 2013 Hiding a curve does not erase it To erase curves click on and select one of the Erase options 56...

Page 57: ...measurement click on Stop test You may change Level and Frequency without stopping the test Sound level meter using on ear microphones The manual control feature enables the Axiom to be used as a sou...

Page 58: ...ustic impedance of the sound source differs for the ear canal and 2cc coupler measurements further RECD differences will result The Audioscan RECD measurement protocol uses the Audioscan RECD transduc...

Page 59: ...Click on Measure coupler and follow the setup instructions 7 Click on to generate the coupler response curve green When this curve is stable click on to save it 8 Click on Daily or Weekly to toggle t...

Page 60: ...ceeded go to RECD coupler response If a valid coupler response exists then click on Measure real ear 5 Refer to Positioning the probe tube and insert the probe tube into the ear canal to within 2 5 mm...

Page 61: ...list button on the RECD setup poster step 2 above and selecting a different age from the drop down list RECD results The RECD measurement screen shows the response of the RECD transducer in the real...

Page 62: ...ap is recommended for fitting all linear and non linear hearing instruments Refer to On Ear Measures Setup and On Ear Measures Screen Setup for terminology and information on preparing the system for...

Page 63: ...y This changes the CORFIG used for 2cc targets 3 Click on the fitting method button and chose from FIG6 NAL NL1 NAL R POGO II BERGER LIBBY USER NONE An estimated aided threshold curve is calculated by...

Page 64: ...ld be used with headphone or insert phone thresholds because individual REUR isn t part of these thresholds 4 When all selections have been completed click on to save these selections and continue Cli...

Page 65: ...forated ear drums will cause large differences usually around 1 kHz REAR measurement procedure 1 Click on and then click on Insertion gain in the On ear menu 2 Referring to On Ear Measures Setup and O...

Page 66: ...nd and without masking effects with results expressed as a by multiplying by 100 Level distortion effects are included but no hearing loss desensitization is applied An idealized speech region of LTAS...

Page 67: ...rument to CROS 6 Select REAR 2 and obtain a response using Pink noise at 55 Adjust the response to match that obtained in step 3 7 Position the speaker directly in front of the client Select REAR 3 an...

Page 68: ...ndividually measured acoustic differences between real ears and the couplers used for calibration and testing The Speechmap environment provides two hearing instrument verification options on ear meas...

Page 69: ...y of these changes that responsibility rests with the National Centre for Audiology NAL NL1 in Speechmap The NAL NL1 procedure seeks to amplify speech such that all bands of speech are perceived with...

Page 70: ...ing aids developed by Brian Moore at the University of Cambridge UK It specifies the level dependent gain required to correct abnormal loudness as modelled by his cochlear hearing loss simulation It p...

Page 71: ...the Stimulus list button to select the stimulus type Click on the Level list button to select stimulus level Click on to run the long term average test and display the data Click on to cancel the tes...

Page 72: ...a checked stimulus from the list click the stimulus you want to remove You can also choose to have the envelopes of the speech test results automatically hidden leaving only the LTASS when you start a...

Page 73: ...Axiom User s Guide Version 1 6 August 2013 Screen tour unaided screen 73...

Page 74: ...ed to the hearing instrument microphone is modified to include average microphone location effects for the hearing instrument type indicated The screen display for both modes is the same showing SPL m...

Page 75: ...of speech stimulus conditions Killion and Mueller Hearing Journal January 2010 pp 10 15 Using Custom Stimuli in Speechmap Custom digital sound files can be used as stimuli in Speechmap If you connect...

Page 76: ...ulus will begin playing 9 Use your new stimulus with all the features of Speechmap Example of two custom files click wav and 1khztone wav in the stimulus list To remove custom stimuli from Speechmap c...

Page 77: ...specifications using your preferred audio editing software Leveling Options By default Speechmap will automatically level the WAV file so that the Long Term Spectrum matches the level selected for the...

Page 78: ...Axiom User s Guide Version 1 6 August 2013 Example of user supplied files user wav user_ 4 wav and user_ 2 5 wav 78...

Page 79: ...ected an entry screen will be provided after the air conduction thresholds have been entered 3 UCL Uncomfortable Level Select from Enter or Average If Average is selected UCL will be estimated from en...

Page 80: ...put and 1 Press the barcode trigger and center the red line on each barcode from a distance of 6 8 in 15 20 cm The scanner will beep and the Barcode Entry poster will open A green check mark indicates...

Page 81: ...ally adjusted for the stimulus level you select 5 Click on to signal average and store a complete passage Repeat as necessary 6 Click on to stop the test without recording any test data Upon completio...

Page 82: ...esented adjust the hearing instrument s frequency shaping and gain for average sounds so that the middle curve the LTASS falls within the target range shown by the symbols especially between 500 4000...

Page 83: ...previous test may be automatically hidden See Speechmap Setup to change this behaviour To change the default stimulus type and level see Saving test setup 4 In Test box mode while the 90 dB sweep is b...

Page 84: ...g instrument and click on the Equalize button on the setup poster After equalization unmute or turn the instrument on and follow the fitting procedures presented previously in this section It is neces...

Page 85: ...menu Choose 65dBSPL from the Level pull down menu Note that only the LTASS is shown for these stimuli and targets if selected have been suppressed 5 Click on to measure and store the long term signal...

Page 86: ...ing instrument have been verified use one of the Speech std stimuli to verify aided speech audibility or target match as described elsewhere in this section for frequencies below the isolated band FM...

Page 87: ...results should be within 2 dB of the results from step 3 If not change FM settings and repeat A coupler mic extension cable is available See Microphone connection Real ear verification of FM only open...

Page 88: ...ts of the speech signal The ICRA noise female and child speech signals are presented as recorded with no spectral shaping The ISTS consists of 500 ms segments from recordings of 6 female talkers readi...

Page 89: ...4 32 1 1000 51 0 50 0 52 0 52 7 50 4 53 15 0 10 5 26 4 32 7 1250 50 5 48 0 51 0 45 4 51 3 53 14 8 5 5 22 0 33 6 1600 48 0 47 4 51 1 41 1 48 5 53 15 5 4 0 22 1 33 9 2000 45 0 44 9 51 2 39 7 47 0 53 16...

Page 90: ...in 100 levels or samples in each 1 3 octave band for a 12 8 second passage The level in each band that is exceeded by 1 of the samples called L1 or 99th percentile has historically been referred to a...

Page 91: ...e the failure 1 To access Self test click on and then click on Self test 2 If you received a Max out in or a Routing failure remove any hearing aids from the test chamber and rerun self test 3 Unplug...

Page 92: ...r starved for air zinc air cells because of a tight seal on the battery compartment Try using a fresh battery The test box reference microphone the white one in the sound chamber is incorrectly positi...

Page 93: ...e in its place Try test box calibration using the reference microphone of the on ear probe microphone in place of the test box reference microphone If this is successful the test box reference microph...

Page 94: ...speaker overdriven This message may occur in on ear unaided or aided tests if The external sound field speaker is improperly connected The test environment is too reverberant for the distance between...

Page 95: ...Axiom User s Guide Version 1 6 August 2013 If your scanner has a Unitech logo scan the following barcode to reset the scanner to its default settings 95...

Page 96: ...Axiom User s Guide Version 1 6 September 2013 96...

Page 97: ...tave 12 Analysis filter bandwidth 1 12 octave Measurement accuracy at 1 kHz 1db Measurement accuracy re 1 kHz 1 dB 200 5000 Hz 2 5 dB 5000 8000 Hz Measurement range 30 140 dB SPL Harmonic distortion m...

Page 98: ...distortion On ear spectral analysis On ear noise reduction verification Manual measurement of output gain and distortion Fitting methods available Speechmap with DSL 5 0a NAL NL1 CAMFIT Insertion gain...

Page 99: ...Axiom User s Guide Version 1 6 August 2013 99...

Page 100: ...ng the amplified sound CORFIG coupler response for flat insertion gain the transformation added to real ear insertion gain to obtain 2 cc coupler gain Assumes linear amplification Coupler a device use...

Page 101: ...Input Compression a form of AGC in which the signal level is regulated before the volume control Input Output function steady state single frequency plot of the coupler SPL on the ordinate as a functi...

Page 102: ...ar canal ANSI S3 46 Pure tone a signal containing one and only one frequency a sinusoidal acoustic signal 1 REAG Real Ear Aided Gain difference in dB as a function of frequency between the SPL or BSPL...

Page 103: ...a hearing aid the limiting of output caused by the output circuitry and transducer reaching their maximum capability SPA Special Purpose Average the average of values in dB at three third octave freq...

Page 104: ...y triangle wave 1 Valente M Strategies for Selecting and Verifying Hearing Aid Fittings New York Thieme Medical Publishers Inc 1994 ANSI S3 5 Methods for Calculation of the Speech Intelligibility Inde...

Page 105: ...nelisse L E Gagne J P Seewald R C 1991 Ear level recordings of the long term average spectrum of speech Ear and Hearing 12 1 47 54 Cornelisse L E Gagne J P Seewald R C 1991 Long term average speech sp...

Page 106: ...otection Agency Platz Rainer 2004 SNR Advantage FM Advantage and FM Fitting Proceedings from the 1st International FM Conference www phonak com Scollie S D Seewald R C Cornelisse L E Jenstad L M 1998...

Page 107: ...Sinclair S T Moodie K S Seewald R C 1997 Pediatric Hearing Instrument Fitting Phonak Video Focus 2 Booklet Stofa Switzerland Phonak A G Sinclair S T Seewald R C Cole W A 1996 A new real ear fitting sy...

Page 108: ...Axiom User s Guide Version 1 6 August 2013 24 Appendix 1 Manufacturer Disclosure Statement for Medical Device Security 108...

Page 109: ...Axiom User s Guide Version 1 6 August 2013 109...

Page 110: ...Axiom User s Guide Version 1 6 August 2013 110...

Page 111: ...played from 16 bit binary audio files stored in the on board flash memo ry In the Verifit these audio files are up loaded from the internal compact disc CD drive at power up In order to provide a repe...

Page 112: ...re frequency modulated triangle 3 over 128 ms 2 2 Broad band signals 2 2 1 Pink Noise signal The pink noise signal is available for Multicurve 2 cm3 coupler gain and output frequency response mea sure...

Page 113: ...tly controlled with 1 12 octave resolution at the reference microphone Two simultaneous re sponse curves one for each speaker are derived from the measured output of the hearing aid This provides a re...

Page 114: ...the Speech std 1 passage at that level These three signals may be used to deter mine the amount of frequency shift provided by fre quency lowering hearing aids and the sensation level of the lowered c...

Page 115: ...Figure 6 Note that curves are 1 3 octave band levels at 1 12 octave intervals which causes the 1 3 octave bands at 4000 5000 and 6300 Hz to appear broader than 1 3 octave For clarity the Speech3150 c...

Page 116: ...nd levels for an overall SPL of 65 dB This shaping is applied to the 75 dB SPL speech and ICRA signals Figure 6 Microphone location effects in dB re nominal band SPL Nominal band levels are band level...

Page 117: ...de is in 1 3 octave bands Other analyzers use narrower analysis bands sometimes having constant bandwidth As shown in Figure 7 this can result in significantly underestimat ing the audibility or comfo...

Page 118: ...signal For example a 1 3 octave band of speech will exhibit a spectrum 2 3 octave wide The dynamic nature of speech is often characterized by the distribution of short term levels in each 1 3 octave...

Page 119: ...ble repeatable result However the effects of adjustments to hearing aid pa rameters need to be seen quickly in order to be useful for optimization To resolve these conflicting needs speech signals are...

Page 120: ...9th percentile is at threshold Figure 11 When LTASS is at threshold SII 33 which corresponds approximately to SRT 09 01 29 Etymonic Design Incorporated 20 Ludwig St Dorchester ON Canada N0L 1G4 USA 80...

Page 121: ...nvelope is above threshold Figure 13 Level of 99th percentile for Speechmap speech signals at average vocal effort 09 01 29 Etymonic Design Incorporated 20 Ludwig St Dorchester ON Canada N0L 1G4 USA 8...

Page 122: ...signals at average vocal effort Figure 15 Dynamic range of Verifit speech signals at average vocal effort 09 01 29 Etymonic Design Incorporated 20 Ludwig St Dorchester ON Canada N0L 1G4 USA 800 265 2...

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