USER GUIDE - Interton
Digital trimmer-controlled
In-the-Ear hearing instrument
Thank you for selecting an Interton ITE (In-the-Ear) hearing system!
Please familiarize yourself with the information in this guide. It contains important instructions
for proper use and care, technical performance information and other general information about
your hearing system. Your hearing instruments have been adjusted to your particular hearing
Your hearing healthcare professional will explain these adjustments and the special features of
your particular model.
Becoming Accustomed to Amplification
While purchasing a hearing system is a major step, it is only one step in a process towards more
comfortable hearing. A hearing loss is usually acquired gradually over many years. Successfully
adapting to the amplification your hearing system provides takes time and consistent use. You
will enjoy more benefits from your Interton hearing system by wearing the system regularly in
order to get comfortable with using it.
This booklet & your instrument
In this booklet you will find explanations on controlling your instrument, on the daily
handling of it, and on its use. Furthermore, you can read what to do if things do not live
up to your expectations. We will also give a few practical steps towards better hearing.
Switching on and off
Changing batteries
Inserting and removing the instrument
Recognising left and right instrument
Setting the volume (optional)
Program button (optional)
T-program (optional)
Using the telephone
Hearing through an induction loop
Maintenance and cleaning
General warnings
Solving small problems
Eight steps towards better hearing
Hearing instrument identification
International warranty and service
Technical Data
General Precautions
wax guard
microphone opening
battery door
pull out cord
vent (optional)
CIC HPG-P Hearing Instrument
wax guard
microphone opening
program button (optional)
battery door
pull out cord
MC HPG-P Hearing Instrument
wax guard
program button (optional)
microphone opening
battery door
volume wheel (optional)
wax guard
microphone opening
battery door
program button (optional)
volume wheel (optional)
vent (optional)
ITC/ITC HPG-P Hearing Instrument
ITE HPG-P Hearing Instrument
Switching on and off
Your hearing instrument is switched off by opening the battery
Switch your instrument on by closing the battery door.
After your instrument is switched on, the volume will always be On-close
as set by your hearing care practitioner. Read more on this on
page 9.
Your instrument can have a push button to switch programs. However, if you close the
battery door your instrument will always start in program number 1. Read more on this
subject on page 11.
• At night, leave the battery door open. It increases battery life and allows moisture in
your instrument to evaporate and increases the instrument’s life span.
Changing batteries.
When the hearing instrument generates a warning signal it’s
advisable to change your battery as soon as possible. The signal will continue as long as the battery is not changed or unless
it does not run out of power, and therefore it is advisable to
keep an extra battery at hand.
Open the battery door by placing your fingernail or a pencil
under the edge of the battery door and gently push it backwards. When opened, remove the dead battery. The end of the
cleaning brush is magnetic. It allows for easy battery removal/
The replacement battery type and size depends on your hearing instrument:
Instrument type
Battery type
10A zinc-air
10A zinc-air
312 zinc-air
13 zinc-air
Remove the protective seal from the fresh battery and insert
it in the battery door, with the plus side facing up. You will recognize the plus side of the battery because marked with a +.
Check whether the + symbols on the battery and on the battery
door are on the same side.
• Keep batteries away from children and mentally challenged persons.
Always insert a battery in the opened door, never directly into
the instrument.
• Do not attempt to recharge the batteries, as they could explode.
Close the battery door. This should go smoothly, so never force
it as this could damage your instrument.
• Batteries can be harmful if swallowed. If you do, seek medical attention immediately.
• Do not burn the batteries, as they could explode.
• Replace spent batteries and do not leave them in the instrument for a prolonged
• Used batteries are harmful to the environment. Please dispose of them according
to local regulations or return them to your hearing care practitioner.
Inserting and removing the instrument
• When correctly positioned switch on your instrument by closing the battery door.
• The insertion process varies with the shape of your ear
canal. A fairly straight ear canal allows easy insertion. However, some ear canals have sharper curves and may require
more care.
• You can as well insert the hearing instrument while in the on position. However you
might experience some feedback (whistling) during the operation.
• Take the hearing instrument between thumb and index finger
and position its �point’ in your ear canal. If available the colour
dot must point upwards on CIC instruments and on MC instruments.
• Now slide the instrument all the way into your ear canal with
a gentle, twisting motion. Insertion can be easier if you gently
pull your auricle backward with your other hand.
• Move the instrument up and down with your index finger and press gently to ensure it
is positioned correctly. Opening and closing your mouth can aid insertion. You will feel
when the instrument is inserted correctly.
Removing your instrument
• Using your thumb and index finger gently pull the hearing
instrument (not the battery door) from your ear. CIC instruments and MC instruments often have a thin plastic pullout
cord. Use this. Never pull the battery door.
• Removal may be easier if you open and close your mouth
while simultaneously pulling your auricle backward with your
other hand.
Take some time at home to practice how to insert and remove your instrument. Work
conveniently positioning your elbows on a table and maybe using a mirror.
Recognising left and right instruments
Your hearing instrument is custom-made to fit your ear. Therefore, right and left instruments differ in shape.
Your hearing instrument is marked with either a left or right indication:
• A left instrument has a blue wax guard or blue dot;
• A right instrument has a red wax guard or red dot.
This is easy to remember: Red = Right.
The colour dot must point upwards on the CIC and on MC instruments.
Setting the volume on STAGE (optional)
Your instrument has an optional volume control. Your hearВ­
ing instrument practioner will have chosen an optimal
volume setting for you and explain at what level that is.
In difficult situations some people can benefit for adjusting the
volume from this setting. On the MC, ITC and ITE a volume
wheel is available and can provide you with the ability to adjust
the volume to your liking. This volume wheel is not available
on CIC hearing instruments.
Use your index finger to turn the volume wheel. Turn the wheel forwards to increase and
turn it backward to decrease the volume.
Do not swap your hearing instruments. Please pay attention to this during cleaning,
storing, and inserting.
Program button (optional)
Your hearing instrument can be equipped with three different
listening programs. Each program will have the most suitable
settings for certain situations.
When you close the battery door and switch the instrument on it will start in program
1, confirmed by one single beep.
After pressing the program button, the instrument will switch
pro-gram. If it was in program 1 it will switch to program 2, if
it was in program 2 it will switch to program 3.
Let your hearing care practitioner fill out the following table:
If programs 2 or 3 are not activated, nothing will happen.
Press the program button if you want to move to a different listening program.
Your instrument will give an audible signal after pressing the
program button. A little later, the instrument will give:
• one single beep if set in program 1
Type of program
Intended for
listening situations
• two beeps if set in program 2
• three beeps if set in program 3
T-program (optional)
Your ITC instrument or ITE instrument may have a built in function, the telecoil,
enabling in many cases an improved use of the telephone and better hearing in
those churches or halls where an induction loop system is installed.
In order to activate this function, the telecoil program has to be selected. In this program you will hear no sounds from the microphone, therefore most environmental
sounds will be lost.
Using the telephone
• Switch your instrument to the telecoil program.
• Hold your telephone handset behind your ear, close to the
hearing instrument (1 inch, or 2-3 cm.) and slightly tilt the
receiver outwards.
• Listen to the dialing tone and move the handset a little to
find the position that give the best reception.
• If needed, and if your hearing instrument has it, turn the volume wheel up or
• After completing the phone call, switch your instrument back to the microphone
If the phone used has poor telecoil signal, use the microphone program. Do not hold
the handset too tightly against your ear since this might cause �whistling’.
Hearing through an induction loop
More and more public places, churches, theatres and cinemas, have induction loop systems. In these particular rooms, they transmit, wirelessly, the sound of the presenter or
show. At home, radio or television can be connected to an induction loop. Sound quality
through an induction loop is often better because noises from the environment are not
Maintenance and cleaning
Earwax (cerumen) will accumulate on your hearing instrument during use. If earwax enters the instrument it can damage it. The instrument has a protection system, the wax
guard. Clean the instrument and replace the wax guard filter regularly. Failure to do so can lead to an accumulation of earwax
impairing sound quality.
• Switch your instrument to the T-program, using the program button.
Cleaning is easier when accumulated earwax is dry; e.g., in the
morning, before you insert the instrument into your ear.
• Choose a good spot. Reception is not clear at all locations; it depends on the position
of the induction loop. Watch for signs or try a different seat yourself.
• If needed, adjust the volume up or down.
• After service or show, switch your instrument back to a micro­phone program. You
will now hear through the microphone again.
• Your hearing care practitioner will gladly provide you with advice regarding an induction loop system at home. Ask for it.
Cleaning the instrument
• Clean your instrument with a soft, dry cloth and the small
brush. Do this above a soft surface or table to avoid damage if
the instrument falls.
• Do not use water or fluids.
Cleaning the vent
Your hearing instrument may have a vent, a small canal through
the entire instrument. If so, clean it regularly.
• Insert the vent-cleaning tool – plastic line with handle – into
the vent. Push the cleaning line completely through the
• Wipe off any collected earwax.
Wax guard
Your hearing instrument is usually equipped with a wax guard system. This prevents
earwax entering the instrument. Replace the wax guard every two weeks or sooner,
depending on earwax accumulation.
Interton uses two different wax guard systems, depending on the size and type of the
hearing instrument. They are described on the following pages.
• Work at a table. It is easier and avoids your instrument falling onto the floor or items
getting lost.
• Pull the line out and wipe off again.
• Repeat this until all the earwax has been removed.
Replace wax guard �Sentry II’
Hearing instruments of type CIC or MC instrument are usually equipped with a wax guard
called ”Sentry II”. Please verify this with your hearing care practitioner.
• Insert the wax guard into the sound outlet of the hearing
Sentry II wax guards are available in a set, containing red guards, blue guards, and a
dedicated tool for changing them.
Use red wax guards for right instruments and blue guards for left instruments.
• To remove the wax guard from your hearing instrument, slide
the forked side of the tool under the wax guard and pull it upwards.
• Remove the tool and press the wax guard down with your
thumb to secure it.
• Pick up a new wax guard from the front side of the card by
using the other ’nub’ end of the tool. The large red and blue
arrows on the card indicate the front side. Slide the wax guard
to the side, through the card.
Replace wax guard �Sentry’
Hearing instruments of types ITC or ITE instrument are usually equipped with wax guards
called ”Sentry”. Please verify this with your hearing care practitioner.
Sentry wax guards are available in a small plastic box, containing red guards, blue guards,
and a dedicated tool for changing them. Use red wax guards for right instruments and
blue guards for left instruments.
The wax guard insertion tool has two different ends: A and B.
End A is used to screw and unscrew wax guards; end B is used to
tighten the guard in the instrument.
• Remove the wax guard from your hearing instrument using
end A. Press the end firmly onto the wax guard and unscrew
it. Turn counter clockwise.
• Pick up a new wax guard from the box. Press end A firmly
onto the new wax guard and unscrew it from the box. Turn
counter clockwise.
• Insert the wax guard into the sound outlet of the hearing
instrument. Screw the guard into the hearing instrument.
Turn clockwise.
• Use the other end (B) of the tool to tighten (gently) the wax
guard in the hearing instrument.
Storing your instrument
When you are not using your instrument, keep or transport it in the box supplied.
Leave the battery door open. Keep your instrument in a dry place, not in a bathroom
or other humidplace. Alternatively, you could store the instrument in a desiccator from
your hearing care practitioner.
Cleaning the microphone opening
Your instrument will not work properly if the microphone opening is dirty. Ask the
hearing care practitioner to clean the opening. Never try this yourself.
General warnings
• Do not leave your hearing instrument in the sun, near an open fire or in a hot, parked
• Do not wear your instrument while showering, swimming, in heavy rain or in a
moist atmosphere such as steam bath or sauna.
• Remove your instrument when applying cosmetics, e.g. perfume, aftershave, hair
spray, suntan lotion.
• Hearing instruments should be used only as prescribed by your hearing care practitioner. Incorrect use may result in sudden and permanent hearing loss.
• Do not allow others to use your hearing instrument. It may cause permanent damage.
• Hearing instrument usage by children or mentally challenged persons should be
supervised at any time.
• Do not take your instrument into rooms where you receive treatment with X-rays
or MRI.
• Wearing a hearing instrument might cause an increased production of earwax. In
rare cases, the anti-allergenic materials may cause skin irritation. If so, or if in doubt,
consult your physician or ENT consultant.
• Should your instrument become moist, put it in a dessicator. Your hearing care
practitioner will be happy to counsel on this.
Solving small problems
Your Interton instrument is a reliable one. In case of minor problems or malfunctions, you may be able to solve them yourself.
• Is your instrument inserted correctly?
• Is the volume very loud?
• Are you holding your hand or an object (e.g. a hat) too
close to an instrument?
• Is you ear full of wax?
Put it in again
Reduce it
Move your hand away or create some more space between
the instrument and the object
Visit your physician
No sound
• Is the instrument switched on?
• Is the instrument switched on the telecoil program?
• Is there a battery in the instrument?
• Is the battery still good?
• Is you ear full of wax?
Switch it on
Switch it to the microphone program
Insert a battery
Replace it with a new one
Visit your physician
Sound is distorted,
spluttering or weak
• Is the battery dead?
• Is the battery dirty?
• Did your instrument get moist?
• Replace it with a new one
• Clean it or use a new one
• Use a dissecator
Battery drains
very quickly
• Did you leave your hearing instrument
switched on at night?
• Is the battery old?
• Always switch off the instrument at night
• Check the date on the battery packaging
Eight steps towards better hearing
You need to get used to your new hearing instrument. Sounds seem new and different.
That is because you grew accustomed to your diminished hearing. Therefore, familiar
sounds seem strange or unnatural at first. Every first-time user of a hearing instrument
responds differently to this. Some can wear the new instrument a whole day right from
the start, while others find it hard to get used to.
After a while, you will notice you appreciate hearing with a hearing instrument and that
you will find it quite normal. Below, eight steps are described that will guide you through
the initial period. If you are not satisfied or keep experiencing problems, please consult
your hearing care practitioner.
1. Get used to familiar sounds at home
Try to get used to the new sounds from a familiar environment. Listen to the different
(background) sounds and try to recognise them. When you are tired from listening, remove your instrument and pause for a while. Talk or read aloud for a while. In that way you
will familiarise yourself with the sound of your own voice. Gradually, you will learn to use
the instrument for longer and become more comfortable with it.
2. Listen outside; quiet & traffic
Go outside to a quiet place, e.g., the park or woods. Listen to the environmental sounds.
Do you recognise them?Please be careful with sounds from heavy traffic at this stage of
getting used to your instrument. Sometimes it sounds very loud.
Try not to get frightened.
3. Have a conversation with a single person
Use your instrument in conversation with one person, a family member or a friend.
Move to a quiet spot. Explain that you are now wearing a hearing instrument. Ask the
other person to talk normally. Look at your conversation partner. If your instrument is
tuned to your requirements you will be able to communicate better than before.
4. Listen to radio or television
Listen to the radio or television. Start with the news, then turn to another program. Ask
a �normal hearing’ person to set the volume of your radio or television to a comfortable
level. If necessary, adjust the volume on your hearing instrument.
If you cannot understand the radio or television, ask your hearing care practitioner to
adjust your hearing instrument. He or she is able to inform you on other facilities, such
as an induction loop system at home for your radio or television.
5. Get used to conversations in a group
Following conversations in a group is often difficult because of the background noise.
Listen to the different voices. Try to recognise them by timbre or rhythm and link each
voice to a person. Focus your attention on the person you want to understand. Practice
this regularly. If you did not understand something that was said, please ask for it to be
repeated. Ensure that you can see the face of your conversation partner(s) clearly and
that there is sufficient light. This will help you to lip-read. Avoid �looking into the light’.
Position yourself with your back towards the window, so that you can see the other
person(s) better. Ask others to talk slowly and clearly. Talking louder does not help.
6. Visit public buildings
Visit public buildings. Try to sit near the speaker; try to be seated in the front rows in
a show. Avoid a seat behind a pillar or in an alcove, you will be in a �sound shadow.’ In
a restaurant, sit with your back towards the wall. This avoids disturbing noises coming
from behind you. If an induction loop is present, and your instrument has a telecoil, use
the T-program. However, not every position will have good sound reception. Watch for
signs at the location or try a different seat.
7. Use your telephone
Often, you can hear the telephone clearly with your hearing instrument in a microВ­
phone program. Hold the telephone handset 1-inch (2-3cm) from your ear and tilt the
receiver outwards a little. See whether or not the telephone sounds better if you
switch your hearing instrument to the T-program. Read about this on page 13.
Your hearing instrument meets strict international regulations. Therefore, it should be
possible to use a GSM telephone in most cases. However, in some circumstances,
disturbance might be audible through your hearing instrument.
8. Use your instrument all day
Using your hearing instrument and practising with it is the best way to learn to hear again.
Even if you can hear without an instrument in some cases. Try to wear your instrument
all day. In that way, you will benefit the most. Of course, a hearing instrument cannot
restore natural hearing, but it will help you make the most of your hearing as it is today.
Go beyond these eight steps and discover the world of sound around you. Do the
things you enjoy and listen to the sounds from your environment.
Hearing instrument identification
Your hearing care professional place a check mark in the below table to identify the
model you have received.
Model received
TypeHearing care professional
Model received
TypeHearing care professional
Serial number Right:
Serial number Left:
International warranty and service
Any digital hearing instrument from Interton has an international warranty. Read more on
this subject on the warranty card you received with your instrument.
If your Interton hearing instrument malfunctions, it must be repaired by a qualified
technician. Do not attempt to open the case of the hearing instrument since this would
invalidate the warranty. If your Interton hearing instrument requires service, please contact your hearing care professional for assistance.
Before you leave, obtain from your hearing care practitioner an address list for Interton
services. In case you need support, contact the nearest Interton Company during your
stay abroad.
Warning to the hearing care practitioner
Special care should be exercised in selecting and fitting a hearing instrument(s)
whose maximum sound pressure level exceeds 132 dB SPL with an IEC 60711: 1981
occluded ear simulator, because there may be a risk of impairing the remainВ­ing hearing
of the hearing instrument user.
Technical Specifications
Max. Output dB SPL according to IEC-118-0
ISG13-P, ISG113-P (CIC-P)
125 dB SPL
ISG23-P, ISG123-P (MC-P)
125 dB SPL
ISG 223-U (MC-U)
130 dB SPL
ISG33, ISG233 (ITC)
125 dB SPL
ISG33-P, ISG233-P (ITC-P)
128 dB SPL
ISG233-U (ITC-U)
135 dB SPL
ISG43-P, ISG343-P (ITE-P)
136 dB SPL
General Precautions
• Consult a physician if you find a foreign object in your ear canal, if you experience
skin irritation or if excessive ear wax accumulates with the use of the hearing instrument.
• Different types of radiation, e.g. from NMR or CT scanners, may damage the
hearing instrument. Therefore, do not wear the hearing instrument during these
or other corresponding scanning procedures. Other types of radiation (burglary
alarms, room surveillance systems, radio equipment, mobile telephones, etc) contain less energy and will not damage the hearing instrument. They could however
momentarily affect the sound quality or create strange sounds from the hearing
• Warning: Do not wear the hearing instrument in mines or other explosive areas,
unless those areas are certified for hearing instrument use.
Faceplate/Electronics by: Interton A/S. Any issues relating to
the EU Medical Device Directive 93/42/EEC should be directed
to Interton A/S.
Interton A/S | Lautrupbjerg 7 | DK-2750 Ballerup Denmark |
Tel.: +45 45 75 1111 |
16900900-GB.10.11. Rev. D
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