HEARING AID
HB-79P
Selecting Earpiece
Remove the tube from the earhook. Insert the
earpiece into your ear. If this earpiece does
not fit your ear, replace it with other one.
Earmold
The earmold is made just for your own ear,
so that it can completely fit your ear.
If the earpiece does not fit your ear and
whistling occurs, use of the earmold is
recommended. Consult your local dispenser.
3-20-41 Higashimotomachi, Kokubunji, Tokyo 185-8533, Japan
HOW TO USE YOUR FIRST HEARING AID
z Any hearing aid cannot return level of your hearing to normal
or halt further hearing deterioration, but proper use of your
hearing aid can help you hear what is going on around you
and let you get more enjoyment of life.
z
If this is your first hearing
probably be surprised at the loudness of the sounds, and after
using it for a short while, you may even feel that it is too noisy.
The following three tips are important in overcoming your
concerns.
1) Read this manual and become familiar with the hearing aid's
various mechanisms and how to use them correctly.
2) First, use your hearing aid in a quiet place and listen to quiet
sounds and give yourself sufficient time to get accustomed
to the sound of your hearing aid.
3) If any physical problems develop, consult your doctor.
aid
, you - like most new users - will
FOR KEEPING YOUR HEARING AID LONGER
z Always keep the hearing aid clean. Clean the hearing aid
with dry cloth periodically and also remove earwax plugged
in the earpiece or earmold using eyebrush or toothbrush.
z Do not expose the hearing aid to the heat from stoves, etc.
Also, avoid leaving it in places with high humidity.
z Operate the controls with care. Do not press hard.
z If the hearing aid is dropped in water, wipe with dry cloth
and ask the dispenser for check.
z Do not pick the microphone with nail, pin, etc., because this
may damage the microphone.
z Do not disassemble or attempt any repairs by yourself. Ask
the dispenser for repair.
Battery Placement
1. Seal off the sticker on the positive side of battery (PR-44P
or 675AP zinc-air battery) before loading. The battery
operates normally in about 1 minute after the sealing is
removed.
2. Open the battery door.
3. Insert a PR-44P or 675AP battery into the battery
compartment with correct polarity; the plus mark on the
battery must be matching.
4. Close the battery door tightly.
1
Be sure to remove the battery when the hearing aid is not to be
used any time.
Battery life: Approx. 190 hours (IEC), 110 hours (ANSI)
2 3
(PR44P or 675AP, for continuous use)
Battery life will change depending on the operation
condition.
Putting on Hearing aid
1. Hold the hearing aid as shown and put it on your ear.
2. Insert the earmold or earpiece into your ear.
OPERATING INSTRUCTIONS
Parts and Controls
Tube and earpiece shown above are not included as
standard accessories in some countries.
If the earhook does not fit your ear as shown below, consult
your local dispenser. Different size of earhooks are available.
O-MT-M Switch
O: Power Off
Set to "O" when the hearing aid is not in use.
MT:Microphone and Telephone Coil
Sounds through both the microphone and
telephone coil can be heard. Set to "MT" position
when using your hearing aid for telephone or
induction loop system in combination with the MT
balancer.
When the switch of the hearing aid is set to MT, noise may be heard in the
vicinity of electromagnetic fields, such as generated for example by
electronically secured gates or similar.
M: Microphone
Set to "M" for ordinary use.
When taking off the hearing aid, set the switch to "O". If not , whistling
(acoustic feedback) may occur.
Volume Control
Adjust the sound volume to your comfortable
level with the volume control. The best position
of the control will depend upon the distance and
voice of the person to whom you are talking;
readjustment may be necessary.
When using the hearing aid for the first time, set
the control for a minimum sound level to hear,
then increase the volume gradually.
MT BALANCER (MTB)
This control serves to adjust the volume of sounds through the
telephone pickup coil when the main operating switch is set to
the MT position. Turning it clockwise from the position illustrated
on the right side reduces the volume of sounds through the
telephone pickup coil. When this is set to the T position, you
can only hear the sounds through the telephone pickup coil.
TONE CONTROLS
Tone H (Low Cut)
Turning this control clockwise reduces the amount of low frequency
amplification. Maximum reduction at 500 Hz is 18 dB.
Tone L (High Cut)
Turning this control counterclockwise reduces the amount of high
frequency amplification. Maximum reduction at 3000 Hz is 12 dB.
GAIN CONTROL (GAIN)
Gain control allows you to increase gain by up to 30 dB. Set
the O-MT-M switch to "M" and main volume control to "3", then
set this control to the most comfortable sound level by turning
it clockwise to increase acoustic gain.
OUTPUT POWER CONTROL (OPC)
This control serves to adjust the maximum output so that your
hearing can be protected from sudden loud sounds. The
automatic gain control (AGC) action will be activated by turning
this potentiometer counterclockwise.
TECHNICAL DATA (According to ANSI Standard S3.22 1987)
Maximum SSPL90 131 dB
HFA-SSPL90 129 dB
HFA-full-on Gain 66 dB
Reference Test Gain 52 dB
Frequency Range 110 Hz to 5900 Hz
Equivalent Input Noise Level 26 dB
Total Harmonic 500 Hz 3%
Distortion 800 Hz 2%
1600 Hz 1%
Operating Switch O-MT-M
AGC OPC
Output Limiting Control OPC, range 18 dB (continuous)
Tone Control TONE H, TONE L (continuous)
Gain Control MAIN + GAIN, range 55 dB
Induction Coil Sensitivity 125 dB at 10 mA/m
BatteryType 675AP or PR44P
Supply Voltage 1.3 V
Battery Current 4.9 mA
Battery Life 110 h
Dimensions 4.9 × 1.64 × 1.02 cm
Weight (excluding battery) 6.5 g (excluding battery)
(Typical value)
Frequency response curve and
effect of tone control
SSPL90 curve and effect of
output limiting control
TECHNICAL DATA (According to IEC standard Pub. 118-0-1983)
Reference Test Frequency 1600 Hz
OSPL
90
500 Hz 134 dB
Peak 140 dB
Full on Acoustic Gain 72 dB
Equivalent Input Noise Level 25 dB
Total Harmonic 500 Hz 6%
Distortion 800 Hz 3%
1600 Hz 2%
Operating Switch O-MT-M
AGC OPC
Output Limiting Control OPC, range 18 dB (continuous)
Tone Control TONE H, TONE L (continuous)
Gain Control MAIN + GAIN, range 55 dB
Induction Coil Sensitivity 112 dB at 1 mA/m
Battery Type 675AP or PR44P
Supply Voltage 1.3 V
Battery Current 2.8 mA
Battery Life 190 h
Dimensions 4.9 × 1.64 × 1.02 cm
Weight (excluding battery) 6.5 g (excluding battery)
Basic frequency response curve
and effect of tone control
137 dB
(Typical value)
OSPL
output limiting control
curve and effect of
90
Full-on gain curve
Note:
(1)
Production number (serial
number) is indicated at the
back side of a hearing aid.
(2) Manufacturer's name is
imprinted at the back side
of a hearing aid.
Full-on acoustic gain frequency
response curve
No. 25963 05-11
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