AURICAL Aud Service Manual March 2011

Copyright notice No part of this Manual or program may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written consent of GN Otometrics A/S. Copyright© 2011, GN Otometrics A/S Printed in Denmark by GN Otometrics A/S, Denmark All information, illustrations, and specifications in this manual are based on the latest product information available at the time of publication. GN Otometrics A/S reserves the right to make changes at any time without notice. Version release date 23. March 2011 15:29 Technical support Please contact your supplier.

FM template version: 01-02-2010

Table of Contents AURICAL Aud Service Manual 1

Introduction... 5 1.1 AURICAL Aud... 5 1.2 The OTOsuite Audiometry Module... 6 1.2.1 NOAH... 7 1.3 HI-PRO... 8 1.4 About this manual... 8 1.4.1 Installation and Assembly... 8 1.4.2 Safety... 8 1.5 Typographical conventions... 9 1.6 Service philosophy of AURICAL Aud... 9

2

Installation... 11 2.1 General notes... 11 2.2 Equipment failure... 11 2.2.1 Interference... 11 2.3 Debugging and error reporting... 12 2.3.1 Backup file... 12 2.3.2 Log files... 12

3

Troubleshooting... 13 3.1 AURICAL Aud and OTOsuite... 13 3.2 HI-PRO... 14

4

Service and repair... 15 4.1 Necessary equipment... 15 4.2 Approved service parts... 15 4.3 Servicing AURICAL Aud... 15 4.3.1 Replacement of the upper and lower cabinet covers... 16 4.3.2 Replacement of the Main PCB... 16

5

Updating AURICAL Aud Software... 17

6

Calibration... 19 6.1 Introductory notes... 19 6.2 Installation of the AURICAL Aud Calibration Application... 20 6.2.1 System requirements... 20 6.2.2 Installation procedure... 20 6.2.3 Launching the Calibration Application... 20 6.3 Prerequisites... 20

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Table of Contents AURICAL Aud • Service Manual

6.4 The Microphone and Mastoid Corrections Editor... 6.5 The Custom Calibration Norm Editor... 6.6 Navigating the Calibration Application... 6.6.1 The AURICAL Aud Calibration toolbar... 6.6.2 File menu... 6.6.3 AURICAL Aud menu... 6.6.4 Settings menu... 6.6.5 About AURICAL Aud Calibration... 6.7 AURICAL Aud Calibration Application features... 6.7.1 Signals... 6.7.2 Calibration frequencies... 6.8 Sound Field calibration... 6.8.1 Speaker angles... 6.8.2 Noise presentation via multiple speakers...

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21 22 23 23 24 26 27 28 28 28 30 31 32 32

Quick Guides - Calibration... 33 7.1 7.2 7.3 7.4 7.5

Quick Guide - Getting started with the AURICAL Aud Calibration Application... Quick Guide - Transducer re-calibration... Quick Guide - Speaker calibration... Quick Guide - Microphone Corrections Editor... Quick Guide - Use your own Calibration Norm (RETSPL values)...

33 35 40 46 48

App. 1

References... 53

App. 2

Calibration details... 55

Index... 65

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Introduction This section introduces you to AURICAL Aud as well as to this Service Manual.

1.1

AURICAL Aud

AURICAL Aud is a PC-controlled audiometer for testing a person's hearing. The audiometer, which is connected to a PC via USB, is operated from the OTOsuite Audiometry Module PC software. With AURICAL Aud you can perform all standard audiometric tests, tone and speech audiometry and special tests. The intuitive graphical user interface and the user test feature enable you to carry out your tests with very little effort. You can connect other devices easily through the built-in USB Hub, and the integrated Sound Hub provides the necessary connections to carry out counseling using the OTOsuite Counseling and Simulations module. Besides the hardware, AURICAL Aud contains firmware, device serial number and a calibration. Note · The DSP firmware is downloaded automatically at connection to the PC running the OTOsuite Audiometry Software.

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Introduction The OTOsuite Audiometry Module

Configurations

AURICAL Aud is available • as a separate audiometer, or • as part of the integrated AURICAL system. Each configuration is available with an optional built-in HI-PRO. AURICAL Aud can be placed on the desk top, mounted directly on the back of the AURICAL speaker, or, if the optional kit is used, it can be mounted on the wall or under the desk. Operating AURICAL Aud

•

•

•

You operate AURICAL Aud from the PC’s keyboard/mouse with the OTOsuite Audiometry Software Module acting as the display showing the intensity, frequency as well as current settings and other information on the PC monitor. From the OTOsuite Audiometry Software Module, which is NOAH compatible, you can monitor test results, create User Tests, store and export data, and print reports. Test intensities and frequencies as well as the current test settings and other information are shown on the PC monitor. Speech input signals can be taken from audio files on the PC hard drive, CDROM, external line-in devices such as a CD player, or live-voice from a microphone.

Outputs

AURICAL Aud supports the following types of output: • One set of headphones. The supported headphone types are: – TDH39 headphones – TDH39 with ME70 – Holmco – HDA 200 • One set of insert phones. The supported insert phones are: – E-A-RTONE 3A • Bone Oscillator B-71, calibrated for mastoid placement • 2 sound field speakers. The speakers can use either the power amplifier built into AURICAL Aud or an external power amplifier.

1.2

The OTOsuite Audiometry Module The OTOsuite Audiometry Module is designed to operate with AURICAL Aud as the test device (produced by Otometrics). The OTOsuite Audiometry Module provides you with comprehensive control and overview of the current stimulus and masking choices both numerically and graphi-

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Introduction The OTOsuite Audiometry Module

cally in the displayed audiogram when you test with a connected Otometrics audiometer. As the module is part of OTOsuite, audiograms can be used directly in other OTOsuite modules such as the PMM and Immittance modules for an optimized workflow independent of NOAH, and for combined reporting. With the Audiometry Module, you can • perform Tone and Speech testing, using the Audiometry Module as a handy control panel while you follow stimulus settings and test progress on your PC display • create complete User Tests for specific audiometric tasks, including selection of specific speech lists, viewing preferences, activation of operator monitoring peripherals, etc. • view and print test results • view historic audiometry results from NOAH or XML • control play-back of speech test material • use the Masking Assistant to prompt when masking is recommended • view masking level indicator in audiogram • view audiogram overlays • enter tester details and test date entry for manually entered audiograms • enter special test and tuning fork test results 1.2.1

NOAH

OTOsuite integrates with: • NOAH systems • NOAH for ENT • NOAH-compatible Office Management systems. The NOAH System is a HIMSA product for managing clients, launching hearing test applications and fitting software, and storing audiological test results. OTOsuite stores test results using NOAH 3. Note · Whenever reference in this manual is made to NOAH, this reference should also apply to NOAH compatible systems.

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Introduction HI-PRO

1.3

HI-PRO AURICAL Aud is available with an optional built-in HI-PRO (Hearing Instrument Programming Unit). The HI-PRO serves as a standardized interface between OTOsuite and programmable hearing instruments, and can serve as remote control for programmable hearing instruments. On the AURICAL Aud cabinet there are two connectors (6-pin mini-DIN) for the cables to the programmable hearing instruments (or remote control), so that both a left and a right hearing instrument can be programmed. The PC software for programming the hearing instrument is made by the hearing instrument manufacturer. The cables for connecting hearing instruments to HI-PRO are supplied by the hearing instrument manufacturer.

1.4

About this manual This manual is a a guide for helping skilled service technicians calibrate and verify the performance of the AURICAL Aud calibration. A Quick Guide is included in this manual for easy access to the Calibration Application. See 7.1 Quick Guide Getting started with the AURICAL Aud Calibration Application X 33. This manual also describes service parts that are approved as replaceable. See 4 Service and repair X 15. 1.4.1

Installation and Assembly

The AURICAL Aud User Manual contains a full description of unpacking instructions, and how to assemble the device. For instructions on installing the software, see the OTOsuite User Manual. 1.4.2

Safety

This manual contains information and warnings which must be followed to ensure the safe performance of AURICAL Aud. Warning · Local government rules and regulations, if applicable, should be followed at all times. Safety information is stated where it is relevant, and general safety aspects are described in App. 2 Standards and Safety X 127 in the AURICAL Aud User Manual.

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Introduction Typographical conventions

1.5

Typographical conventions The use of WARNING, CAUTION and NOTE

For safety reasons and appropriate use of AURICAL Aud, the manual contains WARNINGS, CAUTIONS and NOTES, which you should read carefully. The use of these headings is denoted as follows: Warning · Indicates that there is a risk of danger to persons, test device and data. Caution · Indicates that there is a risk of damage to the device and/or data. Note · Indicates that you should take special notice.

1.6

Service philosophy of AURICAL Aud AURICAL Aud contains no parts that can be repaired or replaced on a component level. In practice this means that servicing the device is limited to replacement of the approved service parts on a modular basis. Caution · The manufacturer reserves the right to disclaim all responsibility for the operating safety, reliability and performance of equipment serviced or repaired by other parties. Following repair, a qualified electronics engineer should verify the safety of all equipment. Warning · For safety and in order not to void the warranty, the AURICAL Aud cabinet should only be opened, serviced and repaired by authorised service personnel at authorised workshops. In case of any defects, please make a detailed description of the defect(s) and contact your local distributor. Warning · Never use a defective device!

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Introduction Service philosophy of AURICAL Aud

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Installation

2.1

General notes Caution · AURICAL Aud and OTOsuite must always be installed in accordance with the instructions in the AURICAL Aud User Manual and the OTOsuite User Manual. A few recommendations regarding handling and installation of the device are listed below: • Make sure that the device is protected from repeated hard shocks and vibrations. • Avoid sharp bends in the cables near plugs, buttons, sound transducers etc. See 3 Troubleshooting X 13 for details concerning related problems and their solution. • Background noise and atmospheric pressure can affect the measuring accuracy of the device.

2.2

Equipment failure If you believe that the correct function or operating safety of the device is impaired in any way, disconnect it from the power supply and secure it against further use. 2.2.1

Interference

Unwanted sound in transducers may occur if AURICAL Aud is exposed to a strong radio field, and such noise may interfere in the process of recording an accurate audiogram. Many types of electrical devices, e.g. mobile telephones, may generate radio fields. We recommend that the use of such devices in the vicinity of AURICAL Aud be restricted.

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Installation Debugging and error reporting

2.3

Debugging and error reporting In the following sections you will find tips and ideas, which may be helpful when you service or troubleshoot AURICAL Aud. 2.3.1

Backup file

When the back-up function is enabled in OTOsuite, the OTOsuite measurements can be restored in case of OTOsuite failure. You will be prompted to reload these measurements when you launch OTOsuite. 1. 2. 3. 2.3.2

To enable/disable the backup function in OTOsuite, select Tools > Configuration Wizard. Click Next until the Preferences screen is shown. Enable/disable the checkbox Backup of measurements.

Log files

Log files are generated for both the AURICAL Aud Calibration Application and the OTOsuite application. They can be found in the following location on the PC running these applications: Documents and SettingsAll UsersApplication DataGN OtometricsLog...

The folder All Users is usually located in the Documents and Settings folder, but this may depend on the configuration of the PC or network server.

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Troubleshooting This section contains a list of descriptions related to known problems that can occur with AURICAL Aud. A list of problems, their causes and possible solutions are listed in the following troubleshooting tables.

3.1

AURICAL Aud and OTOsuite Problem

Cause

Solution

Crackling in the sound signal, temporarily interrupted or missing signal.

• Jack plugs and connectors other than gold plated types may be oxidated.

• Clean the plugs and connectors thoroughly with a dry cloth.

• Faulty or dirty contacts inside main distributing frame of the sound booth.

• Use direct cabling between the equipment inside and outside the sound booth instead of connecting via the main distributing frame

• Probably unshielded cables are used in the signal line from the microphone.

• Use only shielded cables of good quality in the signal lines.

• Other brands of microphones are used.

• Use only microphones from Otometrics.

Unwanted sound picked up by the desktop microphone

• Strong radio fields generated by e.g. mobile phones or other interfering HF devices.

• Use the boom microphone instead of the desktop microphone.

During installation, the installation process may be interrupted. Various error messages may occur.

• The PC’s virus scan is active and prevents the installation process from progressing.

• Deactivate the PC virus scan until the installation process is completed.

When OTOsuite is launched, one or more error messages may appear regarding XML errors.

• An earlier version of OTOsuite was installed. An extended version of data sets has been installed with the new version of OTOsuite

• Accept the error message. This message only appears the first time the new version of OTOsuite is launched.

Hum and/or noise added to the microphone signal.

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Troubleshooting HI-PRO

Problem

Cause

Solution

There is no connection to AURICAL Aud.

• The USB cable connecting AURICAL Aud to the PC was connected prior to installing OTOsuite. This results in a Windows default driver being allocated.

1 Select the Windows Device Manager followed by Universal Serial Bus controllers .

The faulty connection will be marked by a yellow question mark in the list. 2 Uninstall the driver. 3 Make sure OTOsuite is installed and relaunch OTOsuite.

3.2

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There is no connection to AURICAL Aud, or the connection is sometimes lost.

• The USB cable is defective or longer than 3 meters.

• Use a powered USB hub to extend the cable length.

Screens in OTOsuite contain elements (e.g. words, numbers) that look spoiled or not fully represented.

• The DPI setting of the display card are incorrect.

• Set the DPI setting to normal size: Open the Control Panel and select Display Properties. Select the Settings tab and click the Advanced button. In the General tab set the DPI setting to 96 DPI.

The error message “Device error 49, Self test error 44” is shown when you launch OTOsuite.

• Calibration data may be corrupt in device.

• Contact Otometrics for further assistance.

The error message “Device error 8. Evaluation error”” is shown when you launch OTOsuite.

• The phones are not calibrated.

• Make a valid calibration of the phones using the AURICAL Aud Calibration Application.

Problem

Cause

Solution

The HI-PRO PC Com light indicator flashes

• There is a communication failure between the PC and HI-PRO

• Power AURICAL Aud off and then back on.

HI-PRO

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Service and repair This section lists references for how to replace the approved service parts which contain mechanical parts and a printed circuit board. ESD precautions

Pay special attention to ESD during any service performed on an open device. Note · AURICAL Aud contains parts that are sensitive to ESD (ElectroStatic Discharge). Any replacement should be performed in accordance with the existing ESD precautions.

4.1

Necessary equipment Tools and equipment needed for service is described in the ‘How to assemble/disassemble instrument’ Work Instruction.

4.2

Approved service parts The label Approved service parts covers the mechanical, electrical and software related items which are approved by Otometrics to be replaced.

4.3

Servicing AURICAL Aud Important · The top and bottom covers of AURICAL Aud are assembled with snapclick locks. We recommend that you do not disassemble and then reassemble AURICAL Aud, as this will reduce the function of the locks and the assembly will not become tight. The following sections list procedures for replacing approved service parts of AURICAL Aud. There are three main parts which can be replaced as individual service parts: • The upper cabinet cover • The lower cabinet cover • The main PCB

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Service and repair Servicing AURICAL Aud

4.3.1

Replacement of the upper and lower cabinet covers

To remove or mount the upper and lower cabinet covers of AURICAL Aud, follow the instructions in the “How to assemble/disassemble instrument” Work Instruction. 4.3.2

Replacement of the Main PCB

Replacing the Main PCB assembly, which includes the connection panel, is carried out the same way as described for replacing the lower cabinet cover. Note · It it very important that you state the Serial No. of the AURICAL Aud audiometer when ordering the replacement PCB. The Serial No. also applies to versions with built-in-HI-PRO with a standard USB connection socket. Note · Before replacing the Main PCB assembly make sure to back up relevant data. Make a note of the serial number. Note · The transducer specific off-sets can be moved from the old PCB to the new one using the calibration application.

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Updating AURICAL Aud Software From time to time the software used with AURICAL Aud may need an update. Always make sure that the latest available release of the software listed below is installed. Software component 8-49-75800

Application Software, other languages Speech Material

8-49-82500

Calibration Software

8-49-9020

1081, DSP

8-49-90200

1081, Audiometer

8-49-9021

1081, USB Sound C.

8-49-0922

1081, Boot loader

8-49-9023

1081, Interface doc

Note · The latest version of firmware is automatically installed when the hardware is connected to the PC running the newest OTOsuite version.

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6

Calibration We recommend that AURICAL Aud and connected equipment are calibrated annually by authorized qualified personnel using the appropriate equipment. AURICAL Aud is dispatched from the factory with a Calibration Certificate specifying calibrated transducers (i.e. transducers supplied with the device), according to which standards, and the equipment used for the calibration. Results are listed for each transducer at all standard frequencies. In general, the audiometer is calibrated in dB SPL or dB HL. Note · AURICAL Aud must be calibrated with the standard accessories supplied. If the headset or bone oscillator is replaced, AURICAL Aud must be re-calibrated to ensure that the specifications are met, and that the measuring results are correct.

6.1

Introductory notes Note · The hardware calibration of the PCB in AURICAL Aud can only be carried out by Otometrics in Denmark. Sound field calibration

If speaker output is used, always perform Sound Field calibration before using the speakers for the first time. Note · The Sound Field is not calibrated when AURICAL Aud leaves the factory, as this calibration depends upon the room being used. Standard headset calibration

Before AURICAL Aud is dispatched from the factory it is usually calibrated for the 2 headsets if the standard package is ordered, i.e. the standard headset and an optional headset. With this standard configuration there is no need for further calibration. Additional headset calibration

If, for instance, AURICAL Aud is ordered with one headset only and the need for connecting a different headset subsequently arises, AURICAL Aud must be calibrated for this specific headset.

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Calibration Installation of the AURICAL Aud Calibration Application

When you calibrate a transducer, you must complete the procedure before the new data is saved.

6.2

Installation of the AURICAL Aud Calibration Application The Calibration Application is supplied on the Calibration Software and Service Manuals CD. 6.2.1

System requirements

To install the AURICAL Aud Calibration Application, you need the hardware and software listed in the system requirements on the Calibration Software and Service Manuals CD. 6.2.2

Installation procedure

1. 2.

3. 4.

6.2.3

Launching the Calibration Application

1.

6.3

Insert the Calibration Software and Service Manuals CD in your PC’s DVD or CD-ROM drive. The Installation Wizard starts up automatically. If it does not, select Start > Run and type d:setup.exe, where d: denotes your DVD or CD-ROM drive, and setup.exe is the command for launching the Installation Wizard. The Installation Wizard will guide you through the installation. Follow the onscreen instructions. The installation includes both the AURICAL Aud and the Astera Calibration applications.

Select Start > All Programs > Otometrics Audiometer Calibration > AURICAL Aud Calibration.

Prerequisites Specific equipment is needed and various settings must be selected before you start calibration. 1.

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Make sure that the following equipment is available. – Couplers, ear simulators and artificial mastoids according to the calibration standard. – Measurement microphones for the acoustic couplers (earphone calibration) or for sound field measurements (loudspeaker calibration). – A measurement amplifier or Sound Level Meter. – A sound level calibrator (pistonphone) for microphone sensivity correction. – An artificial mastoid for bone oscillator measurements.

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Calibration The Microphone and Mastoid Corrections Editor

2.

3.

6.4

Before you start the Calibration Application, you must enter Microphone and Mastoid corrections via the 6.4 The Microphone and Mastoid Corrections Editor X 21. If you are using your own Calibration Norm/Standard (Custom), you must create it first using the 6.5 The Custom Calibration Norm Editor X 22.

The Microphone and Mastoid Corrections Editor Before you launch the Calibration Application, you must enter Microphone and Mastoid corrections via the Microphone and Mastoid Corrections Editor. Using the Microphone and Mastoid Corrections Editor ensures that the corrections needed by the Calibration Application are available in the correct format. Once the values have been entered they can be reused, as they are saved in a file on the PC. You can also move the correction values to another PC. If you have used Microphone and Mastoid Corrections with the Astera Calibration Application, you can reuse these files in the AURICAL Aud Calibration Application. The Microphone Correction files are located on the C drive, in the folder Program Files > GN Otometrics > Audiometer Calibration > Microphone Corrections. Note · Before you launch the Microphone Correction Editor, you must exit the AURICAL Aud Calibration Application, if it is open. •

To launch the Microphone and Mastoid Correction Editor, select All programs > Otometrics Audiometer Calibration > Microphone Corrections Editor.

For instructions in using the editor, see 7.4 Quick Guide - Microphone Corrections Editor X 46. File menu Menu selection

Description

New

Clears the editor, readying it for creating a new set of corrections.

Open

Opens an existing set of corrections. Browse if needed. It will automatically open the folder selected for use for the correction files.

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