BHM Medical Contact Mini Installation instructions

User Instruction
digital bone conducted hearing system
 qbinaural
 qmonaural

3
contact mini to another person and/or prevent
unauthorized use.
Indended use:
Bone conduction hearing aids by BHM-Tech are
wearable sound-amplifying devices intended to
compensate impairments in personal hearing.
The fundamental operating principle is to receive,
amplify, and transfer sound via the bone of the
skull to the inner ear of a hearing impaired person.
The amplification suits the needs of a mild to a
moderate hearing loss. They require individual
fitting in performance executed by a hearing aid
professional. The target populations for the contact
mini are adults and children (> 8 months).
Content
Parts on the hearing system ..................... 5
Handling of the hearing system ............ 6-13
ONLY FOR THE ACOUSTICIAN OR ENT.. 13-15
Important Information ...................... 15 -17
Thank you very much for your decision to use a
quality product of BHM-Tech. The digital bone
conducted hearing system contact mini will be
produced in Austria according medical device
directive 93/42/EEC and was developed and
manufactured according to the latest audiological
knowledge and state-of-the-art technical innova-
tions. It has the CE-mark and follows therefore the
newest requirements of quality and safety regu-
lations. If you follow the User Instruction in detail,
your bone conducted hearing system contact mini
will be your reliable partner for many years.
IMPORTANT!
Your bone conducted hearing system contact mini
was especially adapted to your individual hearing
loss by a qualifi ed hearing aid expert. Your
hearing aid expert will also inform you about the
correct use, handling and operation of the contact
mini. Your hearing aid expert will also supply
you with information on regular maintenance
measures. Never pass on your hearing system

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Description of devices:
The bone conducted hearing system contact
mini in monaural style, consists of one
electronic housing and one conduction
receiver housing.
The bone conducted hearing system contact
mini in binaural style, consists of two
electronic housingsand two conduction
receiver housings.
Utility model protection
No: AT 010 553 U1
READ THIS USER INSTRUCTION CAREFULLY
BEFORE USING THE DEVICE.
IN CASE YOU ARE NOT THE USER OF THE
HEARING SYSTEM, PLEASE FORWARD ALL
INFORMATION & DETAILS OF THE INSTRU-
MENTS OPERATION TO A PERSON THAT MAY
BE RESPONSIBLE FOR THE INSTRUMENT.
Please ensure that you have followed all the
relevant procedures within the User Instruc-
tion before you attempt to operate the device.
The device should not be used if you suspect
that it is not functioning or damaged. Please
ensure that the hearing system does not have
any mechanical problems. If the instrument
has been dropped or otherwise damaged,
please send it to your acoustician or ENT to
review and repair. Do not attempt to open the
device, or give to other persons for their use.

5
1Bone conduction vibrator
2Battery door
3Battery size 13
4Paediatric lock
5Microphone port
6Volume control trimmer
7Programming socket –
below socket cover
8Protection cap
6
3
2
1
Parts on the contact mini
hearing system 5
4
7
8
Technical Data according to DIN IEC 118-9
max. acoust.-mech. Sensitivity (dB) 51
max. Output-Force Level (dBOFL) 114
current consumption (mA) 1.06 +-10%
@1.35V
battery size 13
battery life (@ 290mAh battery
capacity)
approx. 270h

6
1. Cable connection
Plug-in the polarized cable into the
electronic housing and on the opposite, plug-
in the polarized cable into the bone
conduction receiver housing. Please take
care of the polarized pins of the cable plugs!
Handling of the hearing
system contact mini:
Attention: The use of the appropriate wearing
set up & components for the patient should
be defined by your acoustician or ENT-doctor.
Your acoustician or ENT will advise you about
the handling of the contact mini and the
accessories (components).
TO ENSURE THE SECURITY AND THE FUNC-
TIONALITY OF THE HEARING SYSTEM, IT IS
ONLY ALLOWED TO USE ACCESSORIES OF
BHM-TECH.

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Take care to insert the battery the correct
way (observe the +-mark and the polarity
of the battery). Carefully close the battery
drawer with your finger until it snaps into the
paediatric lock.
• As the device is not equipped with an ON-
OFF switch because of safety reasons, the
device is switched off by opening the
battery drawer. After daily use, we
recommend you to store the device on a
secure place with the battery drawer open.
The open battery drawer allows for
evaporation of possible penetrated
moisture.
Attention: After removal of sealing tape on the
battery, please wait for 15 seconds under all
circumstances before you insert the battery!
2. Opening of the
battery-drawer- Insertion of battery:
Release the “red” paediatric lock by pushing
the redbutton with the pin-side of the screw-
driver no.1 and insert or replace the battery.

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blade end of the screwdriver No 1.
Consult your acoustician or ENT about the
ideal volume of the device.
Do not change the volume without having
the permission of your acoustician or ENT
department.
Let your acoustician or ENT instruct you
about adjusting the volume of your hearing
system.
Battery:
Please always use high quality 13 size
battery. Consult your acoustician or ENT
about recommended batteries.
If the instrument is not used for longer
period, open the battery drawer and store the
device without battery inside in the delivered
hardcase in a secure place.
Battery Warning:
The contact mini is equipped with an acoustic
battery-warning system. In case of a weak
battery, the gain will be reduced automatical-
ly and a signal tone will be heard. The battery
has to be changed immediately to ensure the
proper function of the contact mini.
3. Adjustment of the volume:
The adjustment of the volume on the device
can be done by turning the volume trimmer
on the electronic housing by using the wedge

9
4. Mounting of the contact mini
onto the wearing systems
The electronic housing, as well as the bone
conduction receiver housing, are equipped
with snap fasteners which enable you the
use of the different wearing systems like
headbands, hairband…
WARNING: If using the hearing system for
babys or small children, because of the weak
skull, you may have to change the position of
the wearing system periodically.
Your acoustician or ent will instruct you.
Select the most pleasant volume by means
of the volume control. The volume will be
“higher“, when you turn the volume trimmer
clockwise by using the screwdriver.
The volume will be “lower” when you move
the volume control trimmer counter-clock-
wise.
Please note:
Special care must be taken to ensure that the
system is properly seated on the head and
the conductor plate of the bone conduction
receiver is firmly seated against the head.
Ensure that the contact is directly in contact
with the skin.
• Hairs between conductor plate and skin will
reduce the transmission of the signals.
• Weak contact and too high volume can
cause feed back (whistling).

10
Always ensure that the electronic housing is
mounted outside on the front of the head and
the bone conduction receiver is mounted rear
inside the wearing system. Improper mounting
will disable the function of the contact mini.
Mount the electronic part and the bone
conduction receiver on the hairband and
headband as shown:
Mounting/Dismounting of components:
1. Electronic-housing:
2.Receiver-housing

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Bending of the hairband:
To optimize the fi tting of the wearing system
hairband, we recommend you to adjust the
hairband by bending, using the following
procedure:
Follow this procedure as shown step by step.
Attention: Risk of burning: Please keep
children away from the area whilst following
this procedure!
1)Remove the electronic housing, bone
conduction receiver housing and cables
from the wearing system.
Then put the hairband, as shown in picture
1, in a suitable vessel, fi lled with hot water
(80 degrees Celsius) for 4 minutes. Take
care that the cableholder made of rubber
are not touching the water.
For using the system as a hairband set up,
the snap fastener on the bone conduction
receiver housing is removed and will be
covered with a protection cap (8), which is
part of delivery.

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3)Then put the hairband for 4 minutes in cold
water to fi x the bend position of the hair-
band. Again, take care that the cableholder
made of rubber are not touching the water.
4)Finally, mount the electronic housing, bone
conduction receiver housing and cable onto
the hairband.
Cleaning of wearging system hairband:
Make sure that before cleaning the
wearing system hairband, electronic housing
max
2)Bend the hairband according to the size of
the head of the patient to get the best fitting.
Fig. 1
80°C
4 min.
max
Fig. 2
Cold
4 min.
Fig. 3

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and bone conduction receiver housing are
removed. Perspiration and humidity should be
removed from time to time by using a moisty
cloth, followed by wipe with dry cloth.
Cleaning of wearing system headband:
Make sure that before cleaning the wearing
system hairband, electronic housing, bone
conduction receiver housing and the
connection cable are removed. For exact
cleaning information, see the instructions on
the labels inside the headband.
Fitting – Programming
of the contact mini
(Only for the Acoustician or ENT – doctor):
IMPORTANT INFORMATION:
The hearing system contact mini is available
as binaural or monaural hearing system.
The decision which device will be left and
which device will be right must be decided by
the acoustician or ENT in the course of the
programming process.
To mark the devices clearly, assemble the
supplied colour rings on the ball of the print
button on the electronic part, as follows:
Blue/Red color ring:
Left/Right device from the patient‘s
perspective.

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Note: Take care that the red colour dot on the
programming cable is on the same position
as the yellow colour marking on the
programming socket otherwise you can
damage the connection!
6. Programming-software
To ensure the proper function of the device,
only use for this product released software.
In case of uncertainness, contact your
supplier or BHM-Tech Produktions-
gesellschaft mbH.
7. After the programming
Remove the programming cable and mount
the socket cover as shown below.
Attention: Please always mount color rings as
they absorb vibrations.
5. Remove of the housing cover
due to programming
Open the battery drawer as shown in section
2. Release the cover-lock by using the
wedge-blade side of the screwdriver no.1
and carefully slide it off as shown. Under-
neath you will find the programming socket.
Plug in the programming cable into the
programming socket.

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• Carefully slide the cover into the housing.
• Carefully press push the cover into the
housing.
Hint: In case you want to disable the function
of the volume trimmer, you can deactivate it
by the programming software.
If your hearing device
doesn’t work:
• Please remember that your hearing device
automatically switches off if the battery
output becomes very low.
• Check if the hearing device is switched on
and the battery door is completely closed.
• Does your battery still supply enough
power and is it correctly inserted? (Always
take a spare battery with you!) – Try a new
battery from a new pack.
• Is the volume control selected properly? –
If the device whistles, please check
whether the hearing device fit properly
against the head.
• If you hear buzzing or whistling noises in
your device, this may not necessarily be
the fault of your hearing device. It may be
caused by interference from a mobile
phone or another electronic instrument.

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Important information:
The basic adjustment of the hearing aid is
carried out by an authorized hearing aid
expert according to the hearing loss of the
patient. The end user is kindly requested
only to operate those controls designed for
his or her easily accessible use according to
instructions.
WARNING!
Incorrect use of your hearing instrument and
batteries may be hazardous to your health.
Please read the following points carefully.
• Keep contact mini and parts of it, which
you have taken off, out of reach of other
persons or children!
• Adjust the volume of the hearing system
according your individual.
• These hearing systems are able to transmit
signals of very high volume. In order to
• If you have tried everything and the hearing
device still does not function properly,
please take it to your hearing aid expert
including a short description of failure.

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avoid possible damage to the ear, the
fitting of the device must be carried out by
an authorized hearing aid expert.
• Never try to recharge a disposable battery!
• Swallowing of batteries may be hazardous
to your health and may cause severe
injuries and even death!
For this reason: Never store batteries
together with medicine! Immediately
consult a doctor, if a battery has been
swallowed!
• Incorrect manipulation or rough handling of
the hearing system may cause detachment
of small components of the hearing system.
• Never expose your hearing system to
extremely hot sun (e.g. behind the
windshield of a car), to direct heat (do not
put it on a radiator) or severe cold (over
night in a cold car) and avoid contact with
chemicals and strong detergents.
• Always bear in mind that hearing devices
do not properly function, if e.g. the battery
is low. This is especially hazardous, if you
move in traffic or are otherwise dependent
on warning signals.
• Switch off your hearing system in mines
or other areas where explosions could take
place, unless your hearing system is
especially certified for such use.
• Never change batteries of the hearing
system in the presence of babies and small
children.
• Store batteries and parts of the hearing
system out of reach of babies and small
children.
• Perspiration and humidity should be
removed from time to time from your
hearing system (wipe with dry cloth).
Always take off your hearing system before
taking a shower or washing your hair,
before going to the sauna or a steam bath.
• Consult a doctor in case of skin irritations
of the ear or head.

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and check-ups by your hearing aid expert
may prevent the need for repairs.
• In the area of interfering with
electromagnetic interference fields, such
as radio transmitters, it may happen that
the audio quality of your listening system is
affected.
Further important points!
• Your hearing system, accessories and
batteries are parts belong to the group of
products of modern technology which have
to be especially disposed of according to
environmental protection. Please take care
that you dispose of your hearing system
and accessories at a hazardous waste
disposal site under all circumstances. Your
hearing aid expert will be glad to assist you
in this matter.
• For extra hygienic and skin-protective
cleaning we recommend special cleaning
agents available at the relevant shops.
Never use any chemical detergents.
• It is imperative that defective hearing aid
must be repaired by an expert. Never try to
open the hearing device yourself. Improper
manipulation will cause any guarantee to
become null and void. If your hearing
system is defect, please consult your
hearing aid expert. Regular maintenance

Version 1.6 - 11/2014 Design: Rabold und Co. / Photo: Erwin Muik
-20°C
+60°C
10%
95%
According to EU guidelines 93/42/EEC
Quality management system according to DIN EN ISO 134850297
Content may be changed without notice in order to improve product performance.
BHM-Tech Produktionsgesellschaft mbH
Grafenschachen 242
7423 Grafenschachen, Austria
www.bhm-tech.at