MedRx AVANT HIT+ Guida all'installazione

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www.medrx-int.com

1200 Starkey Rd., #105, Largo, FL 33771 U.S.A.

Toll Free: (888) 392-1234 • (727) 584-9600

Fax: (727) 584-9602 • Email: medrx@medrx-usa.com

www.medrx-usa.com

Distributor: MedRx International

c/o MAICO Diagnostics GmbH

Sickingenstr. 70-71, 10553 Berlin, Germany

Tel.: +49 30/70 71 46-50

Fax: +49 30/70 71 46-99

E-mail: medrx-[email protected]

Web: www.medrx-int.com

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Contents

Getting to Know Your AVANT HIT+..............................................................................................................................................................................................4

Accessories ..................................................................................................................................................................................................................................5

Setting up the Reference & Coupler Mic.....................................................................................................................................................................................6

HIT MODULE Studio Software Overview ....................................................................................................................................................................................7

HIT Module .................................................................................................................................................................................................................................8

Tool Bars......................................................................................................................................................................................................................................8

Calibrate Coupler Response and HIT Box Verification ..............................................................................................................................................................11

Performing HIT+ Measurements ...............................................................................................................................................................................................12

Attaching Hearing Instruments to the Coupler .........................................................................................................................................................................12

Battery Pills................................................................................................................................................................................................................................13

Setting Up the Hearing Instrument for HIT Measurements......................................................................................................................................................13

Positioning Hearing Instruments in the Test Chamber .............................................................................................................................................................14

Standard HIT Protocol ...............................................................................................................................................................................................................15

Sample HIT Measurements .......................................................................................................................................................................................................15

Printing ......................................................................................................................................................................................................................................18

EMC Precautions .......................................................................................................................................................................................................................20

Safety.........................................................................................................................................................................................................................................24

Symbols that may be used ........................................................................................................................................................................................................24

Technical Information ...............................................................................................................................................................................................................25

Routine checking and subjective tests ......................................................................................................................................................................................25

Limited Warranty.......................................................................................................................................................................................................................26

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Hearing Instrument Testing (HIT) measures the hearing instrument response in a 2cc

coupler in the test chamber. The coupler response is then compared to the

manufacturer specification to ensure quality performance or to detect possible

malfunctions of the hearing instrument.

This system follows the ANSI S3.22 and IEC 60118-7 standards for hearing aid

measurement methods.

The Avant HIT+ supports the following measurements:

OSPL-90 Frequency Response

Input/Output (AGC) Induction Coil

Full on Gain Equivalent Input Noise

Battery Current Reference Test Gain

Harmonic Distortion Attack/Release

This manual assumes that the system hardware, software and drivers are installed

and working properly. Please refer to the MedRx Avant HIT+ Installation Manual for

assistance.

Getting to Know

Your AVANT HIT+

Intended Use Statement:

The MedRx AVANT HIT device is an acoustic chamber that utilizes loudspeakers and

measurement microphones for verification of overall performance of hearing aids

for adults and children. The measurements are made without the hearing instrument

being worn. These devices are to be operated by professionals with education

and/or training in the field of audiometry.

Indication for Use Statement:

The Avant HIT Chambers are for use by professionals with education and/or training

in the field of audiometry to evaluate the overall performance of hearing aids for

adults and children utilizing loudspeakers and measurement microphones. The

measurements are made without the hearing instrument being worn.

The AVANT HIT+ represents a new era of precision Hearing Instrument Testing for

your office. Compact yet rugged, this PC-Based system is USB powered and performs

all required ANSI and IEC tests. The following section of this manual will familiarize

you with the physical features and accessories of the HIT+ system.

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Accessories

Couplers & Adapters

The system includes the couplers and adapters shown above. These will

allow you to perform all ANSI and IEC Hearing Instrument Tests.

NOTE: There is a flexible O-ring inside both the 2cc Coupler and the Body

Adapter. These must remain in place for the couplers to function properly.

Replacement O-rings are available from MedRx. The Allen Wrench is used

when removing the Reference Microphone for re-calibration or replacement.

Coupler Mic

Take care when handling these

components as they are delicate precision

calibrated instruments.

Battery Pills

Battery Pills, also known as Battery Simulators, provide power to the hearing

instrument during testing. The system includes a complete set of Battery Pills

as shown above.

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Setting up the Reference &

Coupler Mic

The Reference Microphone (blue) is pre-installed at the factory.

Carefully install the Coupler Microphone (green) as shown. Take care when

handling these components as they are delicate precision calibrated

instruments.

The Coupler Microphone plug is “keyed”. The arrowhead molded into the

green plug must face the front of the Avant HIT+ when installed.

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HIT MODULE

Studio Software Overview

The MedRx Studio software can run stand-alone or from NOAHSystem or

the TIMSNOAH-Compatible Office System.

Launching the MedRx Studio Software

Stand Alone

•Double click the MedRx Studio shortcut on your Windows

desktop.

NOAH

•Launch NOAH.

•Select a patient.

•Launch MedRx Studio module following NOAH procedures.

Basic Software Options

Several options are available which allow the user to customize the MedRx

Studio software to meet their needs.

Access these options by clicking the settings wheel in the top

right menu bar.

The MedRx Studio software main screen.

Icons are selectable depending on your equipment.

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The Main Screen settings allows you to set the default modules, database,

print templates and more.

If you have more than one MedRx product you can show/hide modules in

the Main Screen settings.

NOTE:Remember, more information is always available in the Interactive

Help System by clicking the “?” Icon in the top right corner of the software

or pressing the F1 key.

HIT Module

Select HIT from the main menu.

Tool Bars

Top Tool Bar

The Tool Bar icons have the following functions:

1. Save Session and Exit

2. Save Session

3. Print

4. Show Journal

5. Show Settings

6. Show Help

7. More Options

The More Options icons have the following functions:

1. Save the Current Session to a File

2. Open session from a file

3. Clear Data from Current Test

4. Open HitBox Verification

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Side Tool Bar

1. On the right side of the screen,

Hearing Aid Ear Selection is

displayed.

2. Hearing Aid Serial Number and

Type of Hearing Aid.

3. Test Set-up window.

4. Stimulus Selection (Select Speech

Noise, ICRA, to evaluate the

performance of noise reduction

circuits).

5. Precalibrate Function. This function allows you to calibrate the

reference level without the hearing aid turned on and then run the

tests without referencing. (Precalibrate can be used if it is suspected

that a high gain hearing aid is leaking sound thus affecting the

reference microphone).

Settings Auto Test Preferences and Procedure Options

1. In the Test Set-Up Window, add

or remove the tests you want to

include in your Auto Test Battery

by clicking on the red X or green

check mark. The tests with the

green check mark will run when

clicking on the Start Auto Button.

2. Click Start to run a single test

that is selected in the Test Set-up

Window. The test will finish after

the measurement is complete.

3. Click MSC (Manual Signal Control) to start a single test in continuous

mode. The test will not finish by itself and will have to be stopped by

clicking Stop icon.

4. Click Start Auto to run the selected tests in sequence.

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Configuring the HIT Software

It is important to note that each module will have different

setting available for customization.

Enter the module and click the settings wheel to customize.

To navigate the settings you will:

•Select the group of settings from the header (1).

•Then choose the setting options from the left sidebar (2).

•The customization options will change based on the group and

settings chosen in the main body (3).

Under Hearing Aid, select the appropriate hearing instrument, battery

type, voltage and test frequencies. You can also load and save hearing

aid defaults.

To select your displayed stimuli, under general, select signal. Click on

each stimulus to display on the main page as dictated by your clinic

policies or jurisdiction’s regulations.

For ANSI and IEC tests, Tone is used as the stimulus.

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