User Guide
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AURICAL HIT and the OTOsuite HIT Module User Guide Doc. No. 7-50-1230-EN/03 Part No. 7-50-12300-EN
Copyrightnotice No part of this documentation orprogram may be reproduced, stored in a retrieval system, ortransmitted, in any form orby any means, electronic, mechanical, photocopying, recording,or otherwise,without the prior written consent of GN Otometrics A/S. Copyright© 2015, GN Otometrics A/S Published in Denmark byGN Otometrics A/S, Denmark All information, illustrations, and specifications in this manual are based on the latest productinformation available at the time of publication. GN Otometrics A/Sreserves the right to make changes at any time without notice. Registered trademarks and Trademarks MADSEN Itera II,MADSEN OTOflex 100, OTOsuite,AURICAL FreeFit, AURICAL Visible Speech, MADSEN Astera², MADSEN Xeta, ICS Chartr 200 VNG/ENG, ICS Chartr EP, OTOcam 300, MADSEN AccuScreen, MADSEN AccuLink,ICS AirCal, AURICAL Aud, AURICAL HIT, ICS Impulse, OTObase and MADSEN Capella² are either registered trademarks ortrademarks of GN Otometrics A/S. Versionrelease date 2015-02-20 Technicalsupport Please contact your supplier.
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Table of Contents 1
Introduction
4
2
Unpacking AURICAL HIT
5
3
Installation
5
4
The test chamber
5
5
Testing hearing instruments
9
6
Maintenance and Calibration
16
7
Other references
17
8
Standards
17
9
Technical specifications
17
10 Definition of symbols
20
11 Warning notes
21
12 Manufacturer
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1 Introduction
1
Introduction AURICAL HIT is designed for Hearing Instrument Testing and Coupler-Based Fitting. AURICAL HIT connects via USB to a computer running the OTOsuite software.
1.1
•
With the OTOsuite HIT Module you can perform traditional hearing instrument testing according to either the ANSI or IEC test protocols, and obtain a consistent picture of every hearing instrument, regardless of manufacturer or type.
•
With the OTOsuite PMM Module you can perform Probe Microphone Measurements in a coupler for pre-programming and pre-fitting hearing instruments without the client being present.
Intended use AURICAL HIT is intended for testing purposes by audiologists, hearing instrument dispensers, and other health care professionals in testing programmable hearing instruments.
Required qualifications It is assumed that the user has a basic knowledge of how to compare the results of the hearing instrument tests with the specifications from the hearing instrument manufacturer and to detect typical malfunctions of the hearing instrument.
1.2
Typographical conventions The use of Warning, Caution and Note To draw your attention to information regarding safe and appropriate use of the device or software, the manual uses precautionary statements as follows:
Warning • Indicates that there is a risk of death or serious injury to the user or patient.
Caution • Indicates that there is a risk of injury to the user or patient or risk of damage to data or the device.
Note • Indicates that you should take special notice.
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2 Unpacking AURICAL HIT
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Unpacking AURICAL HIT 1. Unpack the device carefully. When you unpack the device and accessories, it is a good idea to keep the packing material in which they were delivered. If you need to send the device in for service, the original packing material will protect against damage during transport, etc. 2. Visually inspect the equipment for possible damage. If damage has occurred, do not put the device into operation. Contact your local distributor for assistance. 3. Check with the packing list to make sure that you have received all necessary parts and accessories. If your package is incomplete, contact your local distributor.
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3.1
Installation •
Place AURICAL HIT on an absolutely stable surface.
•
In order to exclude ambient noise and to comply with the ANSI S3.22 standard, place the system in a moderately quiet room.
Connecting the device 1. Install OTOsuite on the PC. See the OTOsuite Installation Guide. 2. Connect the USB cable from the USB socket under AURICAL HIT to a USB socket in the PC. AURICAL HIT is powered by the PC.
AURICAL HIT is selected automatically in OTOsuite.
4
The test chamber Using AURICAL HIT and positioning hearing instruments in the test chamber are described in Testing hearing instruments ► 9.
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4 The test chamber
A. The coupler assembly ► 6 B. Elevation plate ► 8 C. Cable groove ► 8
The AURICAL HIT handle ► 8 (some models only)
4.1
The coupler assembly The coupler assembly consists of the following parts: A. Coupler adapter B. Coupler cavity C. Coupler microphone
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4 The test chamber
Coupler adapter The Accessory Box provides a range of adapters for easy positioning of different types of hearing instruments.
Coupler cavity During tests in the test chamber, the hearing instrument is connected to a 2cc coupler cavity manufactured in accordance with the ANSI standard. Alternatively, you can use an ear simulator. (Note that the ear simulator is not ANSI or IEC compliant, and is not recommended for RECD measurements.) You can use the Coupler Type icons in the toolbar to toggle between 2cc coupler and ear simulator. The selected coupler type is saved with measurements for later reference.
Coupler microphone The coupler microphone is located in a coupler bottom piece which must be attached to the coupler cavity. You can use the coupler microphone either directly in AURICAL HIT or in the Accessory Box.
In AURICAL HIT A. BTE testing - Low coupler position B. ITE, RIE, thin-tube testing - High coupler position
In the Accessory Box Connect the mini-jack cable from the Accessory Box to the mini-jack socket under AURICAL HIT, and insert the coupler microphone in the microphone socket in the Accessory Box. A. Wireless hearing instrument testing
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4 The test chamber
4.2
Cable groove Wrap the programming cable of the hearing instrument once around the cable groove. This prevents the hearing instrument from being pulled out of place when you close the lid for testing.
4.3
Elevation plate Use the elevation plate to facilitate positioning of wireless transmitters and body worn hearing instruments at a level where the microphone or microphones are approximately centered in relation to the loudspeaker.
4.4
The AURICAL HIT handle Note • This only applies to models equipped with a carrying handle.
The handle is designed for carrying AURICAL HIT.
Caution • If you carry AURICAL HIT by its handle, do not use your other hand to support it by the lid, as this may cause the lid to open and squeeze your fingers.
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5 Testing hearing instruments
5
Testing hearing instruments Testing a hearing instrument involves the following main tasks:
1.
Calibrating the reference microphone
Otometrics recommends that you calibrate the reference microphone daily or weekly. Set up the interval to suit your purposes. See Calibrating the reference microphone ► 9.
2.
Positioning the hearing instrument
General instructions are described in • Traditional BTE hearing instruments ► 12 •
Thin-tube hearing instruments ► 13
•
ITE hearing instruments ► 14
3.
Testing
When you have positioned the hearing instrument correctly, you can test it using the OTOsuite HIT module as described in How to perform a standard test ► 15 , or you can perform coupler-based fitting as described in the AURICAL FreeFit and the Probe Microphone Measurements documentation.
5.1
Calibrating the reference microphone 1. Launch OTOsuite and select the HIT module in the Navigation panel. 2. Position the microphones in the center of the test chamber.
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5 Testing hearing instruments
3. Position the reference microphone (1) pointing straight down from above and centered 1-2 millimeters above the coupler measurement microphone (3). 4. During calibration the microphones must have the exact same distance to the main loudspeaker (2), along the Z axis. You can ensure this by looking at the test chamber from the side when you adjust the reference microphone position for calibration. 5. Close the lid. 6. Select Tools> AURICAL HIT Calibration > Reference Microphone. 7. Follow the on-screen instructions.
5.2
Positioning the hearing instrument for testing How you position the hearing instrument for testing in the test chamber depends on the type of hearing instrument or device you wish to test. Regardless of form factor (the type of hearing instrument), the only two important things to remember are: • Aligning directional microphones along the loudspeaker axis. •
Positioning the reference microphone as close as possible to the front microphone of the hearing instrument without touching it.
You can position the hearing instrument to perform all standard hearing instrument tests without repositioning the hearing instrument between the individual tests: • acoustic measurements, •
inductive telecoil measurements,
•
directional microphone test.
Positioning the reference microphone –
As a rule of thumb, position the reference microphone as close as possible to the front microphone of the hearing instrument without actually touching it. Maximum permitted distances are:
5.3
Vertically (Y axis)
8 mm (above)
Sideways (X axis)
±12 mm
Back-to-front (Z axis)
±3 mm
Using the battery simulator 1. Select a battery simulator and insert it in the hearing instrument.
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5 Testing hearing instruments
With AURICAL HIT you receive a set of 4 color-coded battery simulators, which are used to power the hearing instrument. They are also used as probes for measuring the power consumption. Red
A5
Yellow
A10
Brown
R41
Orange
R48
Blue
R44
2. Insert the mini-jack connector of the battery simulator in the battery simulator socket in the test chamber. AURICAL HIT automatically detects the battery simulator.
Caution • When you have connected the battery simulator, make sure that it does not touch other metal parts as this may short-circuit the system.
5.4
Coupler adapters Adapters for use with the coupler are snapped onto the coupler cavity. •
HA-2 (BTE)
Traditional BTE hearing instruments ► 12
•
HA-1 (ITE, RIE, thin-tube)
Thin-tube hearing instruments ► 13 and ITE hearing instruments ► 14 To fix the hearing instrument on the adapter, snap the adapter off the coupler cavity, and attach the hearing instrument to the adapter outside the test chamber.
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5 Testing hearing instruments
5.5
Traditional BTE hearing instruments This procedure applies to any type of standard BTE hearing instruments with traditional ear molds.
Using the HA-2 adapter and BTE adapter tube
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5 Testing hearing instruments
5.6
Thin-tube hearing instruments This type of procedure applies to any type of thin-tube hearing instruments, including instruments with the Receiver In the Ear (RIE)/Receiver In the Canal (RIC), and pre-bent tubing.
Using the HA-1 ITE adapter
Note • If you place some acoustic putty on the receiver wire this will shift its resonance frequency. This will prevent the wire from vibrating and creating feedback during testing.
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5 Testing hearing instruments
5.7
ITE hearing instruments This procedure applies to any type of custom hearing instruments, including ITE (In The Ear), ITC (In The Canal), CIC (Completely In the Canal).
Using the HA-1 ITE adapter
5.8
Telecoil testing 1. Position the hearing instrument in AURICAL HIT as described in Traditional BTE hearing instruments ► 12, Thintube hearing instruments ► 13 or ITE hearing instruments ► 14, so that the maximum field strength will be achieved for the hearing instrument. During telecoil testing AURICAL HIT automatically detects the orientation of the hearing instrument. 2. Enable telecoil mode in the hearing instrument. 3. Close the lid and start testing.
5.9
Hearing instruments with wireless transmitters (e.g. FM) When you test hearing instruments with wireless sound transmission, it is sometimes necessary to separate the input device (transmitter) from the output device (receiver).
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•
To do so, place the transmitter in AURICAL HIT and the receiver on the coupler microphone in the Accessory Box.
•
To set up the Accessory Box, see The coupler assembly ► 6.
Otometrics - AURICAL HIT
5 Testing hearing instruments
•
5.10
For a detailed description of traditional FM testing, see the AURICAL HIT Reference Manual.
How to perform a standard test The procedure 1. Launch the fitting software for the hearing instrument so that you can control its parameters. 2. Launch OTOsuite and select HIT in the Navigation panel. 3. Open the Test Selector and select the ANSI or IEC special test. 4. If OTOsuite is used without Noah, you can fill out the Hearing Instrument fields in the lower right corner of the Standard Tests screen. These fields are filled in automatically when you use OTOsuite with Noah together with the fitting software for the hearing instrument. 5. Position the hearing instrument so that it is ready for testing, and switch it on. 6. If you wish to measure the Battery Consumption, make sure that you connect the battery simulator. 7. Close the lid. 8. If needed, click the arrow buttons in the Measurements table to include the individual tests you wish to perform. 9. Click the Start button in the top left corner of the Measurements table. This will start a sequence of selected tests. 10. Make sure that you follow the on-screen instructions. 11. If you wish to redo an individual test, click on the Start button next to the test.
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6 Maintenance and Calibration
5.11
How to test the directional microphone Directionality measurements as described in the hearing instrument test standards cannot be performed with regular desktop test chambers such as AURICAL HIT. Such measurements require large anechoic chambers. Small test chambers always exhibit acoustic reflections that obscure the true directional behavior of the hearing instrument. However, in AURICAL HIT you can make a functional test of the directional microphone in a hearing instrument. In this test, the signal is first presented to the front of the hearing instrument and then to the back of the hearing instrument. This is done automatically when you start a directional test. The signal used for this test is a flat spectrum Broad Band Noise, band-pass filtered between 750 Hz and 5 kHz, and presented at 70 dB SPL.
The procedure 1. Position the hearing instrument as described in Traditional BTE hearing instruments ► 12, Thin-tube hearing instruments ► 13 and ITE hearing instruments ► 14 depending on the type of hearing instrument. 2. In the field Directionality Adaptation in the OTOsuite HIT module, you can define the duration of the signal presentation before the actual measurement is made. This value accommodates any adaptational behavior of the hearing instrument. Adaptive directionality often takes 10 to 15 seconds or more before the directionality of the hearing instrument is fully efficient. 3. You can either combine the Directional Test with your standard test sequence by checking the sequence checkbox, or run it separately by clicking the Start button.
The result The Directional Test result is shown as a 1/3 octave curve of the difference between the measurement with noise presented from the main loudspeaker and the measurement with noise presented from the rear loudspeaker. The numerical directionality result shown in the Measurements table indicates the average front/back difference in the measured frequency range. The Measurements table also includes the adaptation interval used in seconds.
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Maintenance and Calibration Warning • Under no circumstances disassemble AURICAL HIT. Contact your supplier. Parts inside AURICAL HIT must only be checked or serviced by authorized personnel.
Calibration Calibration of the coupler microphone, and calibration of a new reference or coupler microphone must only be performed by authorized personnel.
Maintenance AURICAL HIT requires no preventive maintenance except for cleaning and regular calibration of the reference microphone.
Repair For any type of repair, please contact your supplier.
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7 Other references
For the sake of safety and in order not to void the warranty, service and repair of electro-medical equipment should be carried out only by the equipment manufacturer or by service personnel at authorized workshops. In case of any defects, make a detailed description of the defect(s) and contact your supplier. Do not use a defective device.
6.1
Cleaning There are no specific requirements to sterilization or disinfection of the device.
Cleaning the device Make sure that the device is kept clean and free of dust: • Remove dust using a soft brush. • To clean the cabinet, use a soft, slightly damp cloth with a small amount of mild detergent on it. Keep the unit away from liquids. Do not allow moisture inside the unit. Moisture inside the unit can damage the instrument and it may result in a risk of electrical shock to the user or patient.
Adapters If needed, remove any acoustic putty residue, and use an alcohol based wipe to clean the adapter.
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Other references For more information, see the following manuals on your product CD: •
AURICAL HIT and the OTOsuite HIT Module Reference Manual (English only)
•
AURICAL FreeFit and the Probe Microphone Measurements Module Reference Manual (English only)
•
OTOsuite SOftware User Manual
See also the OTOsuite Installation Guide provided in the OTOsuite software DVD box.
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9
Standards AURICAL HIT
CE-marked according to the Electrical Safety Directive IEC 610101
Test standards
ANSI S3.22 IEC 60118-7
EMC
IEC 61326-1
Technical specifications AURICAL HIT is type 1082 from GN Otometrics A/S.
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9 Technical specifications
Acoustic stimulus generation In closed test chamber Frequency response, re. 1 kHz, main loudspeaker (equalized)
125 to 200 Hz: ± 3.0 dB 200 to 2000 Hz: ± 1.5 dB 2000 to 5000 Hz: ± 2.5 dB 5000 to 10000 Hz: ± 3.0 dB
Frequency response, re. 1 kHz, rear loudspeaker (equalized)
125 to 10000 Hz: ± 3.0 dB
Maximum output level, main loudspeaker
90 dB SPL (pure tone) 78 dB SPL (speech)
Harmonic distortion, acoustic tone output, main loudspeaker
Less than 0.5 % up to 70 dB SPL Less than 2.0 %, 70-90 dB SPL
Acoustic measurements Frequency range, coupler microphone (equalized)
125 to 200 Hz: ± 3 dB 200 to 5000 Hz: ± 1 dB 5000 to 10000 Hz: ± 3 dB
Battery simulator Voltage range
0 to 2.0 V
Resolution, voltage
0.02 V
Accuracy, voltage
± 0.05 V
Output impedance range
3 to 10 ohm
Resolution, impedance
0.1 ohm
Accuracy, impedance
±5 %
Current measurement range
0.5 to 40 mA
Current measurement accuracy
±5 %
Tele coil Max. field strength
31.6 mA/m
USB port connector
18
Type:
USB device port, type B
Interface:
USB 2.0
Speed:
High speed
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9 Technical specifications
Power consumption:
Max. 2.5 W
Dimensions Approximately, WxDxH
16 x 31 x 28 cm (6.3 x 12.2 x 11 in)
Weight Weight
6.3 kg (13.9 lb)
Transport and storage Temperature:
-15ºC to +55ºC (5ºF to 131ºF)
Air humidity:
10% to 90%, non-condensing
Operating environment Operating environment
Indoors
Operating temperature range
15 to 35 ºC (59 to 95 ºF)
Maximum relative humidity
Maximum relative humidity 80% for temperatures up to 31ºC (88 ºF) decreasing linearly to 50% relative humidity at 40 ºC (104 ºF).
Altitude
Up to 2,000 m (6,562 feet)
Warm-up time
< 15 min
Standards AURICAL HIT
CE-marked according to the Electrical Safety Directive IEC 610101
Test standards
ANSI S3.22 IEC 60118-7
EMC
IEC 61326-1
Accessories •
BTE adapter tube
•
Coupler set, including 2cc coupler, and snap-on adapters HA-1 (ITE), HA-2 (BTE), and body-worn
•
Elevation plate
•
Reference microphone
•
Coupler microphone
•
Accessory Box
•
Battery Probe Kit
•
Accessory Box microphone cable
•
USB cable
•
Acoustic putty
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10 Definition of symbols
10
•
Ear simulator
•
Adapter A
•
Adapter B
•
AURICAL HIT Reference Manual
•
AURICAL HIT User Guide
Definition of symbols Electronic equipment covered by the Directive 2002/96/EC on waste electrical and electronic equipment (WEEE). All electrical and electronic products, batteries, and accumulators must be taken to separate collection at the end of their working life. This requirement applies in the European Union. Do not dispose of these products as unsorted municipal waste. You can return your device and accessories to Otometrics, or to any Otometrics supplier. You can also contact your local authorities for advice on disposal. Consult user manual for warnings and cautions.
Consult instructions for use.
Complies with Medical Devices Directive 93/42/EEC and RoHS Directive (2011/65/EC). UL listing mark.
USB socket for connecting AURICAL HIT to a computer. Socket for connecting external coupler microphone.
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