Senso Vita feedback detailsYou can open the Feedback Details dialog box from the Senso Vita Feedback Test window. The dialog box gives an overview of the feedback test. When you have finished with the dialog box, select the Close button to return to the Feedback Test window. The Feedback Details dialog box displays the details about the feedback test. The details for the measurement of the omnidirectional microphone setting are displayed in the upper half of the dialog box, and the details for the directional microphone setting, if available, are displayed in the lower half of the dialog box. Fb TestThe Fb Test fields show whether the result of the feedback test was OK. If a field shows asterisks, the test has failed in that frequency area. Available GainThe Available Gain value is the measured feedback limit. Note that you cannot change these parameters. They are measured values only. Minimum acceptable gain (MIN)The minimum acceptable gain value is the minimum gain required for normal speech for a band. The available gain must be equal to or larger than the minimum acceptable gain. The Senso Vita Feedback Test windowThe Senso Vita Feedback Test window is split into four panes, all relating to the selected ear. Until you make a feedback test, no data are shown in the window. The two top panes contain graphics for the feedback measurement. One of the panes (right pane for the left ear) shows the Insertion Gain vs. Input curve for the current fitting. The other pane shows an indication of the actual feedback limits. Until you have made a feedback test, only the MIN curve is shown. This curve indicates the minimum acceptable gain for normal speech. When you have made a feedback test, bars indicating the available gain values for the individual bands are shown. The lower two panes of the window show the parameters and the noise level indication. In one of the panes you can see the noise level indication. As long as the noise level in the room is not too high, the indication is green. If the noise level rises above the acceptable limit, the noise indication turns red. In the last pane you can see the measurement data for the feedback test. The Fb Test parameter fields show dashes until you have made a feedback test. After a test, the fields show whether the test is OK, that is, whether the available gain is suitable for the frequency area in question. If a field shows ***, the available gain is not satisfactory, and you should consider remaking the earmould or shell. If you need to see the details of the feedback test, you can select the Details button to open a window with more information. Feedback verification (Senso Vita)The Feedback Verification window is similar to the Feedback Test window for Senso Vita. The upper two panes show the insertion gain vs. input graphics and the feedback limit for the actual fitting. In one of the lower panes you can see the noise level indication, and in the last pane you can see the minimum available gain (MIN) and the available gain measured during the feedback test. Available gain data are displayed for both microphone settings in the hearing aid.
Note: You can use the button at the bottom of the window to change to the Feedback Verification window for the other ear. Select the red ear to change to the Right-ear Feedback Verification window, and select the blue ear to change to the Left-ear Feedback Verification window. The Senso Diva Feedback Test windowThe Senso Diva Feedback Test window is split into four panes all relating to the selected ear. Until you make a feedback test, no data are shown in the window. The two top panes contain graphics for the feedback measurement. One of the panes (right pane for the left ear) shows the Insertion Gain vs. Input curve for the current fitting. The other pane shows an indication of the actual feedback limits. The bars indicating the measured available gain values for the individual bands are shown as soon as you have made a feedback test. In addition to the bars, the MIN curve is shown. This curve indicates the minimum acceptable gain for normal speech. The lower two panes of the window show the parameters and the noise level indication. In one of the panes you can see the noise level indication. As long as the noise level in the room is not too high, the indication is green. If the noise level rises above the acceptable limit, the noise indication turns red. In the last pane you can see the measurement and target data for the feedback test. The four feedback regions cover all bands in the Senso Diva hearing aids. The first row of parameter fields (Fb Test) shows whether the test is OK, that is, whether the available gain is suitable for the frequency area in question. If a field shows *** the available gain is not satisfactory, and you should consider remaking the earmould or shell. The Minimum Acceptable Gain parameter (MIN) covers the minimum gain requirement for normal speech, and the Available Gain parameter values represent the result of the feedback test. [TOP]Binaural fitting of Senso Vita
The Senso Vita Fitting windowWhen you open the Fitting window for Senso Vita hearing aids, you can make a Sensogram and a feedback test for the hearing aids. The graphics in the upper panes reflect the audiogram of the selected client. The darker shade shown in the matrix marks the fitting range of the selected hearing aid. If you have not measured a Sensogram, the Sensogram values calculated by Compass are shown. If you have measured a Sensogram, the measured values are shown in the graphics panes of the Fitting window. Initially, the parameter fields in the lower panes of the window only show the Audiogram HTL values. Until you have made the necessary measurements, the fields for the measurements only contain a dash. You can shift between the Mute and On radio buttons if you want to instruct your client before you start making a Sensogram and/or a feedback test. When you have made the measurements, the four Sensogram fields show the measured thresholds, and the three Fb Test fields show whether the feedback test was OK in the three bands. When you have finished making measurements, you can move on to the Fine Tuning window to work with the parameter values you obtain during the measurements. General fine tuning of Senso VitaThe General fine tuning window is the first window that opens when you enter fine tuning for Senso Vita hearing aids. The General fine tuning window shows the Insertion Gain vs. Input graphics, but if you need to see another type of graphics, you can change the view by means of the Curve Types item on the View menu. In the General window, you can change the IG Adjust parameters for all three bands in the hearing aid. Use the arrow buttons next to the parameter fields to change the setting. Note that whenever you change a parameter away from the original setting, the changed parameter is marked by an exclamation mark. You can use the Master Gain arrow buttons to the right in the parameter panes to adjust the insertion gain for the normal and loud input signals in all three bands simultaneously. Selecting the up arrow increases all parameter values by 1 dB, and selecting the down arrow decreases all parameter values by 1 dB. From the General fine tuning window you have access to windows focusing on the different sound levels, and you have access to the Senso Vita Options window. Use the horizontal navigation bar to open the other fine tuning windows. Loud (Senso Vita)You can use the Loud window to adjust the amplification of loud sounds, that is, for Senso Vita you can adjust the Insertion Gain Adjust, Loud, parameter. Use this window if your client has problems hearing loud sounds correctly. The window shows the unaided and aided speech spectra for loud speech signals. The lower part of the window shows the IG Adjust, Loud, parameter, which you can adjust. The Sensogram HTL values are also shown, but you cannot adjust these values from the Loud window. Normal (Senso Vita)You can use the Normal fine tuning window to adjust the amplification of normal speech, that is, for Senso Vita you can adjust the Insertion Gain Adjust, Normal, parameter. Use this window if your client has problems hearing normal sounds correctly. The window shows the unaided and aided speech spectra for normal speech signals. The lower part of the window shows the IG Adjust, Normal, parameter, which you can adjust. The Sensogram HTL values are also shown, but you cannot adjust these values from the Normal window. Options (Senso Vita)The features available in the Options window depend on the type of hearing aid selected. Below is a short description of the Senso Vita options. Click a heading to get a more detailed description of the option. PRGThe program options let you select the desired combination of listening programs used by the hearing aid. In the default setting the hearing aids use Selection 1, but you can change the setting to match your client's preferences. ParamUnder Program Parameters you can define the settings of the Noise Manager, the Sound Stabilizer, and the program gain in the hearing aid. Initially, the program gain shows 0, but you can increase or decrease the setting. DAIUse the DAI tab to see the setting of the Noise Manager and the Sound Stabilizer, and to adjust the program gain for the direct audio input. MoreUnder the More tab you can define a few general features, such as the crossover frequencies and the volume control. Program checkerDuring fine tuning of Senso Diva and Senso Vita hearing aids, you have access to the Program Checker window. This is a separate window, opening on top of the active fine tuning window. The Program Checker window shows the symbols for the programs available in the selected hearing aid(s) together with the features for which you can change the settings. You can use the program checker to activate the programs in the hearing aid. Use the radio buttons below the symbols to activate the desired program. If you need to mute the hearing aid while the program checker is active, you can select the Mute radio button. Using the program checker
Compass returns to the fine tuning window from which you opened the Program Checker and sets the hearing aid in the master program. [TOP]Program Selection windowThe last step in the basic fitting of a Senso Diva or a Senso Vita hearing aid is to select the programs you want to use. The Program Selection window shows the different program combinations you can use. The number and type of programs available depend on the selected hearing aid model. A hearing aid can contain up to four programs. Below is a short description of each program. Quiet or MUse the Quiet or M (microphone) program for situations in which there is no or only little surrounding noise. NoiseUse the Senso Vita Noise program for situations in which there is surrounding noise. The hearing aid concentrates on sounds coming from the front and eliminates sounds coming from the back. MusicUse the Senso Diva Music program for listening to music. In this program all settings are optimised for listening to music. M/TUse the M/T (microphone/telecoil) program in situations in which both a telecoil and the microphone are needed. TelecoilUse the Telecoil program for situations in which only a telecoil is needed. You can turn this window off under Setup. If you use the Fitting Wizard and this window is not displayed, the feature has been turned off. [TOP]The SensogramThe first measurement you make during a fitting is a Sensogram. The Sensogram window is designed to approximate that of an audiometer. The Sensogram HTL fields are comparable to the intensity dial or attenuator on an audiometer, and the (Auto) Tone Activation field is similar to the tone interrupter switch on an audiometer. The Sensogram window shows data in two panes relating to the same ear. The upper pane shows a graphical view of the present settings, the lower pane shows the parameters and, for Senso Diva, gives you access to the Expanded Sensogram once you have measured thresholds in the four basic bands. The graphical part of the window shows the audiogram data (red or blue curve), the fitting range, and the Sensogram graphs. Initially, the Sensogram graphs show the values calculated by Compass, but when you measure the actual thresholds, these are reflected in the graphics. In the lower part of the window you find the parameter fields for the Sensogram and the Activate Tone button. To make a Sensogram, check that the correct hearing aids are selected, instruct your client to respond to the tones presented, and do as follows:
Note: When you have measured a threshold in one band, simply leave the information on the screen and repeat for the other bands. Note: If you use the Auto Tone Activation mode, Compass delays the presentation of a signal up to 2 seconds when switching between bands. This prevents your client from reacting to your actions instead of reacting to the tones presented. If you use this mode you must select an intensity in the Sensogram HTL field when you change bands. Soft (Senso Vita)You can use the Soft window to adjust the amplification of soft sounds, that is, for Senso Vita you can adjust the Insertion Gain Adjust, Soft, parameter. Use this window if your client has problems hearing soft sounds correctly. The window shows the unaided and aided speech spectra for soft speech signals. The lower part of the window shows the IG Adjust, Soft, parameter, which you can adjust. The Sensogram HTL values are also shown, but you cannot adjust these values from the Soft window. SoundTrackerWidex SoundTracker is a special view opening in a window on top of the main Compass window. In this view, Compass continuously makes measurements more than 15 times per second and displays the input and output on the screen. Note: You can only use SoundTracker if you are working with a NOAHlink programming interface, and if you are working online with Senso Diva or Senso Vita hearing aids. You must also make a Sensogram and a feedback test for the hearing aids before you can use SoundTracker. Note: The SoundTracker graphics are based on actual measurements in the hearing aid. However, the displayed output is partly based on simulated data, since the output signal is measured before the receiver. If you enter individual RECD data into Compass, you will see even more accurate performance graphics. The view shows the output versus frequency relationship. You can see the Sensogram curve and the UCL curve as static curves. The input is shown in dB HL at microphone level as the lightly coloured area in the view, and the output is shown in dB HL at eardrum level as the deeper coloured area. The maximum output within each second is also displayed as the coloured 'dotted line' above the output areas. While SoundTracker is open, you cannot change any parameters. Use the Start SoundTracker button to start measuring output. When SoundTracker is running you can use the Stop SoundTracker button to stop it and set the hearing aid on again. You can also choose whether you want to show the aided or the unaided output. Use the radio buttons to choose the preferred view. When you have finished using SoundTracker, select the Close button to close the window again. Speech Spectra view (Senso Vita)In this view, you can see how various speech spectra are processed through a Senso Vita hearing aid. This view shows the following:
Test modes (Senso Vita)Senso Vita has different test modes that you can use for different verification and performance tests. When you activate a test mode it only remains active as long as the hearing aid is connected to the interface and is online in Compass. For BTE models, you can remove the programming adaptor, and the test mode setting remains active in the hearing aid until you turn the hearing aid off and on again. Test Mode 1This test mode can be used to set Senso hearing aids in a special linear test mode that should only be used for coupler measurements. The purpose of this test mode is to allow reproduction of the Senso data for quality control, service and so on. The setting in this test mode is totally independent of the fitting algorithm. The hearing aid is set to linear mode in the current filter setting with a gain level so that: The hearing aid is saturated when you make an OSPL90 measurement (input signal at 90 dB SPL). The hearing aid is NOT saturated when you make a gain measurement with an input signal at 50 dB SPL. Warning: This test mode should only be activated for coupler measurements. It must NEVER be activated while the hearing aids are in your client's ears. Test Mode 2This test mode sets Senso in a special mode according to the fitting (it follows the Insertion Gain vs. Input characteristics), but the noise detection circuit and the statistically based regulation are de-activated.
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