MedRx Avant HIT+ Training Manual
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MedRx Avant HIT+ Training Manual

Hearing instrument test chamber
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Summary of Contents for MedRx Avant HIT+

  • Page 1 D-0126021-A...
  • Page 2 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-sales@maico.biz...

  • Page 3: Table Of Contents

    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 .......................................

  • Page 4: Getting To Know Your Avant Hit

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

  • Page 5: Accessories

    Battery Pills Adapter. These must remain in place for the couplers to function properly. Replacement O-rings are available from MedRx. The Allen Wrench is used Battery Pills, also known as Battery Simulators, provide power to the hearing when removing the Reference Microphone for re-calibration or replacement.

  • Page 6: Setting Up The Reference & Coupler Mic

    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.

  • Page 7: Hit Module Studio Software Overview

    HIT MODULE Studio Software Overview Basic Software Options The MedRx Studio software can run stand-alone or from NOAH System or Several options are available which allow the user to customize the MedRx the TIMS NOAH-Compatible Office System.  Studio software to meet their needs.

  • Page 8: Hit Module

    Print Show Journal Show Settings Show Help If you have more than one MedRx product you can show/hide modules in More Options the Main Screen settings. The More Options icons have the following functions: NOTE: Remember, more information is always available in the Interactive Help System by clicking the “?”...
  • Page 9 Side Tool Bar Settings Auto Test Preferences and Procedure Options 1. On the right side of the screen, 1. In the Test Set-Up Window, add Hearing Aid Ear Selection is or remove the tests you want to displayed. include in your Auto Test Battery by clicking on the red X or green check mark.
  • Page 10 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. Under Hearing Aid, select the appropriate hearing instrument, battery type, voltage and test frequencies. You can also load and save hearing aid defaults.

  • Page 11: Calibrate Coupler Response And Hit Box Verification

    Calibrate Coupler Response and HIT Box Verification Place the coupler microphone (green) between 2 and 8mm from the reference microphone (blue). Use the large O-ring to raise the coupler mic to the same level as the reference microphone as shown in picture below. Click start and blue lines will show up on top of the calibration lines.

  • Page 12: Performing Hit+ Measurements

    Performing HIT+ Measurements Hearing Instrument Test (HIT) Box standards and procedures are defined by ANSI and IEC. Each test has separate reference and tolerances that can be located in the interactive help files of our software by clicking the “?” Icon or pressing the F1 key. Please refer to these for additional information about each test Attaching Hearing Instruments to the Coupler ITE (In the Ear), ITC (In the Canal) RIC (Receiver in Canal) Hearing Instruments...

  • Page 13: Battery Pills

    Battery pills are used for ITE and BTE Instruments. BTE (Behind The Ear) • Hearing Instruments *Note: Battery Current can also be performed on its own after the 1. Remove the earmold from the hearing selected battery of tests are completed. Battery Current testing cannot instrument.

  • Page 14: Positioning Hearing Instruments In The Test Chamber

    Positioning Hearing Instruments in the Test Chamber The AVANT HIT+ chamber utilizes a speaker located below the test surface. When placing hearing instruments in the chamber, it is critical to place the BTE Hearing Instrument hearing instrument microphone adjacent to the reference microphone. The center of the sound inlet of the hearing instrument microphone should be between 2mm and 8mm from the center of the reference microphone.

  • Page 15: Standard Hit Protocol

    Standard HIT Protocol Sample HIT Measurements The MedRx Studio HIT software is designed to make the process of making HIT measurements simple. The easiest way to complete them is to use the Auto Test feature. The screenshots below illustrate the Avant HIT+ representations of the ANSI S3.22-2009 Hearing Instrument Test Battery.
  • Page 16 Full-On Gain Equivalent Input Noise Reference Test Gain Total Harmonic Distortion Frequency Response Battery Current D-0126021-A...
  • Page 17 Input/Output Induction Coil Attack and Release D-0126021-A...

  • Page 18: Printing

    Printing To Use an Existing Print Template Printing within the MedRx Studio software. You can use the templates provided at installation or create your own templates to suit your needs. 1. Click the print icon in the top tool bar or hold down the Ctrl key Icons in the Print Window and click the P key on your keyboard.
  • Page 19 Create New Print Templates 8. Drag and drop elements onto the page to create your template. 1. Select the printer icon. a. You can combine data from multiple 2. Select the + icon to create a new modules into a single template. template.

  • Page 20: Emc Precautions

    EMC Precautions The Avant Hearing Instrument Test (HIT) Box needs special precautions regarding EMC and needs to be installed according to the following EMC information. List of all cables and maximum lengths of cables, transducers and accessories: Transducer / Accessories Maximum Cable length USB Cable 2.9 meters...
  • Page 21 Guidance and manufacturer’s declaration – electromagnetic emissions Guidance and manufacturer’s declaration – electromagnetic immunity The Avant Hearing Instrument Test Box is intended for use in the The Avant Hearing Instrument Test Box is intended for use in electromagnetic environment specified below. The customer or the user of electromagnetic environment specific below.
  • Page 22 Guidance and manufacturer’s declaration – electromagnetic immunity The Avant Hearing Instrument Test Box is intended for use in electromagnetic environment specific below. The customer or the user of the Avant Hearing Instrument Test Box should assure that it is used in such an environment. Immunity test IEC 60601- test level Compliance level...
  • Page 23 Recommended separation distances between Portable and mobile RF communications equipment and the Avant Hearing Instrument Test Box The Avant Hearing Instrument Test Box is intended to use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user of the Avant Hearing Instrument Test Box can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the Avant Hearing Instrument Test Box as recommended below, according to the maximum output power of the communications equipment.

  • Page 24: Safety

    It is recommended that powered speakers are connected to an isolation transformer. The use environment should be between • All repairs should be sent to MedRx for evaluation and / or repair. Symbols that may be used or SN...

  • Page 25: Technical Information

    Technical Information The Avant HIT+ is an active, diagnostic device. Standards: Hearing Aid Analyzer As Per ANSI S3.22-2009, Magnetic Loop: 31.6mA/m Magnetic Strength, per ANSI Standard IEC 60118-7 2005 Communication Port: USB Speaker Output: Max 95 dB SPL Power Requirements: USB Power Frequency Range: 125 Hz –...

  • Page 26: Limited Warranty

    Limited Warranty MedRx warrants this product to be free from defects in material and workmanship for two years from the time of purchase. If this system fails to perform as specified during this period, the purchaser is responsible for calling MedRx at +49 30 70 71 46 43. The company's representative will advise the owner to either...

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