Jinghao JH-D58 User manual

VER: D58-20210923-V01
Please read this user manual thoroughly and
completely before using the product.
HEARING AMPLIFIER
Instruction Manual Model: JH-D58

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CONTENTS
03
06
07
08
08
11
10
12
18
20
24
26
26
27
28
29
17
13
14
I.IMPORTANT SAFETY INSTRUCTIONS
1.CONTRAINDICATION
2.WARNINGS
3.NOTICE
II.DO NOT USE IF ANY OF THE FOLLOWING APPLY
TO YOU
III.MATTERS NEEDING ATTENTION, WARNINGS
AND TIPS
IV.HOW TO USE YOUR DEVICE
1.HOW TO APPLY DOMES
2.LEFT & RIGHT HEARING AMPLIFIER MARKINGS
3.VOLUME ADJUSTMENT
4.HEARING MODE CHANGE
5.REPLACING TUBING
6.HOW TO USE THE CHARGING CASE
V. MAINTENANCE AND CLEANING
VI. HEARING AMPLIFIERS CARE
VII.TROUBLESHOOTING GUIDE
VIII.TIPS FOR BETTER COMMUNICATION
IX.TECHNICAL SPECIFICATION
X. ACCESSORIES LIST
XI.NORMALIZED SYMBOLS
XII.MAINTENANCE, STORAGE, AND DISPOSAL
XIII.WARRANTY

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I.IMPORTANT SAFETY INSTRUCTIONS
1. CONTRAINDICATION
The device should not be used in the following situations:
- Patients with chronic suppurative otitis media (CSOM),con-
genital ear atresia, or any type of ear discharge
- Anyone under 36 months old
2. WARNINGS
- Keep small parts (hearing instrument, ear domes, battery or
other detachable parts) that can be swallowed out of children’s
reach. Dropping, immersing in liquid, exposure to strong
electromagnetic fields or excessive heat will damage the
hearing amplifiers. Remove devices prior to any type of X-ray,
MRI, or CT scan. If parts become stuck in the ear canal, seek
medical assistance - do not attempt to remove by yourself.
3. Notice
- Do not use at high volume for extended periods of time - ear
injury can result.
- If you experience any pain or strong discomfort using the
devices, remove and consult a doctor.
- Routine maintenance to keep the device clean is required.
Ensure that ear domes are free of debris and moisture at all
times.
- Avoid shocks or dropping the product.
- Do not store or use the product in environments of high
humidity or temperature (such as sauna room), to avoid
damage.
- Batteries should be properly recycled and not disposed in the
trash.
- Keep the devices away from small children. Injury or damage
may result.
- Do not set volume levels too high. Listening with high-output
devices for extended periods at high volume levels can cause
further hearing damage.
- Do not share your hearing amplifiers with others. Using a
hearing amplifier configured for someone else can result in
hearing damage or injury.
- Monitor for any unusual skin reaction. If you notice any
allergic reaction (itchiness, swelling, or rash), stop wearing the
hearing amplifiers and consult a medical specialist.
- Do not touch the hearing amplifiers to any type magnet or
magnetized object. Your hearing amplifiers are delicate
electronic instruments and may be damaged by contact with
Read all the information in this instruction manual and any
other literature included in the box before using the device.
Warning

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strong magnetic fields.
- Do not attempt to open or repair the devices yourself.
Damage can result and will void the warranty.
- Do not store your devices in a hot/humid locations. You
should never leave your hearing amplifiers near heating
appliances or in direct sunlight.
- Do not leave your hearing amplifiers in the car as inside
temperatures can reach dangerous levels which could damage
the devices.
- Do not use the hearing amplifiers together with a cell phone
earpiece directly - excessive noise and distortion may result.
Instead, use via Bluetooth pairing with your cell phone. Radio
wave emissions from mobile phones can cause noise in the
hearing amplifiers or result in reduced volume.
- Please contact the MANUFACTURER:
• For assistance, if needed, in setting up, using or maintain-
ing your devices or to report any unexpected operation or
events
II. DO NOT USE IF ANY OF THE FOLLOWING APPLY
TO YOU:
1) Congenital atresia of external ear or deformity of any part of
the ear canal
2) Deafness is unstable, and the degree of hearing loss often
fluctuates
3) Persistent headaches, dizziness, earaches, tinnitus or other
symptoms that are not suitable for adaptation
4) Sudden onset of hearing loss within the past 3 months; rapid
progressive deafness; unilateral hearing loss or other acute
ear disease;
5) Effusion (secretions/discharge) in the ear and/or frequent
purulence (pus)
Specific warnings / statements
Keep small parts away from and out of children´s reach to
avoid accidental ingestion
Warning not to use in explosive or oxygen-enriched
atmospheres, as doing so may damage the device
Warning that it should only be used by intended person as
using hearing amplifiers designed for someone else may
result in hearing damage

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IV. HOW TO USE YOUR DEVICE
【HOW TO APPLY DOMES】
Step 1: Choose a suitable size ear dome.
Step 2: Push the ear dome rim membrane outward.
1.Volume Control / Turn ON/ Turn OFF
2.Hearing Mode Change
3.Microphones
4.Ear Tube
5.Ear Dome
6.Stabilization Bar
7
7.Charging contacts
1
4
6
5
3
2
1. Do not immerse the hearing amplifier in any liquid. Remove
the hearing amplifier before swimming or bathing. After
swimming or washing, wait for the ear canal to dry before
wearing the hearing amplifier.
2. After removing the hearing amplifier at night, it should be
placed in a case with a desiccant if possible, protected from
light, high temperature and high humidity environment.
3. The external surfaces of the hearing amplifier should be kept
clean, and earwax in the ear domes should be cleaned out
daily
4. Applicable objects: Suitable for people with air-conducting
hearing loss of about 30-50dB
5. When you do not use hearing amplifiers, please charge the
product regularly to avoid battery damage;
the recommended charging time interval of hearing
amplifiers is ≤28 days
6) Central deafness (central nervous system) or non-organic
deafness
7) Patients with acute otitis externa and tympanitis
8) Patients with acute and chronic suppurative otitis media (in
the period of purulent infection)
9) Patients who are allergic to the materials of this product
III. Matters needing attention, warnings and tips

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【LEFT & RIGHT HEARING AMPLIFIER MARKINGS】
There is a R or L marking on the hearing amplifier. This will tell
you if it is a left or a right hearing amplifier.
Step 3: Hold on to the end of the hearing amplifier and push
firmly to ensure that the dome is fastened securely.
Blue marking for left hearing amplifier.
Red marking for right hearing amplifier.
Ear tube
Blue marking Red marking
Notes:
After the ear dome is installed, pull the ear dome gently to see
if it is firmly installed and ensure the ear dome does not fall off
easily.
It may be in few circumstances that the ear dome remain
attached to the auditory meatus after the hearing aid is
taken out. In that case, please ask a professional doctor to
take the ear dome out. Do NOT deal with it yourself, you
could easily cause further damage.
Helpful Hints
· Minor irritation and/or inflammation may occur as your ear
becomes accustomed to having an object in it; if so, please
contact your hearing professional. There are several different
sizes of ear domes that may be more comfortable.
· If an actual allergic reaction occurs, alternative ear dome
materials are available; contact your hearing professional.
· Severe swelling, discharge from the ear, excessive wax or
other unusual conditions warrant immediate consultation with
a physician.
WARNING:

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Note:
1.The hearing amplifier built in with ‘delay turn on’ function. It
will beep and then take a few seconds to begin amplifying
sound when the hearing amplifier is turned on.
2.To avoid a sudden blast of sound, please raise the volume
slowly.
【VOLUME ADJUSTMENT】
The volume adjustment has two functions. It functions as an
on/off control and a volume control. The volume wheel has
numbers on it from 0(minimum) to 3(maximum).
On/Increase: Rotate volume wheel up
Off/Decrease: Rotate volume wheel down
【HEARING MODE CHANGE】
The hearing amplifier has 4 different hearing modes.
You can cycle through the 4 hearing modes by long press of
the hearing mode button to change the hearing mode.
* The hearing amplifier is designed with the memory function:
The hearing amplifier can automatically record the previously
tuned hearing mode.
Hearing Mode
4
3
2
1
4 beeps (“beep beep beep beep”)
3 beeps (“beep beep beep”)
2 beeps (“beep beep”)
1 beeps (“beep”)
Sound you will hear when activated
Noise
Reduction
Quiet
Social
Restaurant
Mode
Turn On/Increase
0
3
Turn Off/Decrease

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【HOW TO USE THE CHARGING CASE】
【REPLACING TUBING】
1.Remove tubing: Rotate tubing base 90° counter-clockwise
and slide off. You may experience resistance when removing
the tubing for the first time.
2.Attach tubing: Gently push new tubing on.
3.Make sure tubing base in flush with sides of hearing amplifier
body when you are finished.
1. Make sure the hearing amplifier is turned off when
charging. Plug the larger end of the charging cable into the
power supply such as a power charger or your computer.
2. Plug the smaller end into the Micro USB port on the
hearing amplifier charger case.
3. The charging case will charge via the USB port on the
case. When the case is charging, the indicator shows a
blue solid light, and fully charged the indicator light will
shows a solid green light will be constant .
*The fully charging case offers 3 full charging cycles for a
pair of hearing amplifiers.
4. The charging process will automatically stop when the
case and hearing amplifiers are fully charged, so the
hearing amplifiers can be safely left in the charger. Place it
on a flat even surface away from exposure to moisture,
dust, or extreme temperatures.
（1）（2）
1
1
1
（3）
1
1

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1.Charging slot of the hearing aid
2.Left-side hearing aid charging indicator
3.Right-side hearing aid charging indicator
4.Charging case charging indicator
5.Micro USB connection to external power supply
Note:
1.Charging case Low Power: The charging case indicator will
flash green when the charging case battery drops below 20%,
please charge the case.
2.When the hearing amplifier and case is not functioning
properly, please check the “charging case troubleshooting
table”. If none of the solutions work, please contact our
after-sales service team.
Hearing amplifiers or case
Hearing amplifiers or case Fully charged
Not charging
Less than
20% power
Flashing Green
Light Device Meaning
Charging
Case only
Hearing amplifiers or case
Blue
Solid Green
Off
All data in this manual, such as service time, charging
time, continuous working time, and charging times are
derived from our internal laboratory testing and meant for
reference purposes only. Your exact usage and times may
differ depending on various conditions and use patterns. It is
a normal phenomenon to hear some high-pitched whistling or
buzzing when the hearing amplifier is at a high volume level
and not fitted well into the ear as a result of mic feedback. If
this occurs, lower the volume and adjust the hearing amplifier
within the ear. Also check to make sure you are wearing the
best size ear domes to ensure a proper fit in the ear canal, as
this may also induce some minor feedback if not snug in the
ear.
1
2
35
4

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1. Daily maintenance
It is important to keep your devices clean and dry. On a daily
basis, wipe them clean using a soft cloth or tissue. To avoid
potential damage from excess humidity or perspiration, the
use of a drying kit is also recommended.
2. Care and maintenance
When not in use, store in a secure area away from small
children and pets.
Do not place hearing amplifiers or charging case near
high-temperature areas such as stoves or direct sunlight.
Do not leave the devices in a humid place for a long time,
such as bathroom.
V. MAINTENANCE AND CLEANING
Take care not to poke the microphone holes with any sharp
objects to avoid damage.
Do not disassemble or attempt any repairs by yourself. Doing
so will void your warranty.
3. Cleaning
1) Cleaning the ear tips
Remove any earwax buildup using the
enclosed tool. Wipe clean with a tissue or soft cloth.
2) Cleaning Tool
Use a soft cloth or tissue to wipe any moisture, perspiration,
or debris from the surface of the tool.
Note: Do not use alcohol or other cleaning solvents to clean
the hook as this could damage the protective covering.
- Keep your hearing amplifiers clean. Extreme temperatures
(heat or cold), moisture, and foreign substances can result in
poor performance.
- Use the cleaning brush tool or soft cloth to clean debris from
around the buttons, microphones, and charging contacts;
inspect the receiver, ear tips, and charging case regularly.
- Never use water, solvents, cleaning fluids or oils to clean your
hearing amplifiers.
- Charging contacts should always be kept clean and dry.
- Always store your hearing amplifiers in the charging case
when not in use or cleaning.
VI. HEARING AMPLIFIERS CARE
Charging Case Care
- Keep your charger clean. Heat, moisture and foreign materi-
als can result in poor performance.
- Using the provided cleaning brush keep the charging ports
clear of debris.
- Do not use water, solvents or cleaning fluids to clean the
charging ports.

No Sound
Connect the hearing
amplifier to the charging
case for charging
Volume too low
Low battery
Battery fully
discharged
Increase volume if
volume control available
Device is not
charged
Microphones
are clogged
Ear domes or
speaker tip are
clogged
Place charging the hearing
amplifier until the indicator
is lighted in green color
Clean out any debris from
the mic holes
Clean out any debris from
the ear domes and
receiver area with the
cleaning brush
SYMPTOM POSSIBLE
CAUSES SOLUTIONS
VII.TROUBLESHOOTING GUIDE
-20--19-
Hearing
amplifier
not loud
enough,
unclear
or distorted
Charge hearing amplifier
Volume too low Increase volume if
volume control available
Ear Domes are
too loose Hearing amplifier not inserted correctly into
ear , wear it correctly
- Keep lid closed as much as possible to avoid dust and debris
build up.
- Store your charger in a clean and dry location, i.e. a dresser
or shelf rather than the bathroom or kitchen.
- To ensure the longest life of your rechargeable hearing
amplifiers batteries and the batteries in the charger:
- Fully charge hearing amplifiers batteries every night.
Service and Repair
If, for any reason, your hearing aid does not operate
properly, do NOT attempt to fix it yourself. Not only are you
likely to violate any applicable warranties or insurance, you
could easily cause further damage.Should your hearing
amplifier fail or perform poorly, check the Troubleshooting
Guide on the next page for possible solutions. If problems
continue, contact us or your hearing professional for advice
and assistance. Many common problems may be solved right
in your hearing professional’s office or clinic.
WARNING:
DO NOT OPEN HEARING AMPLIFIER OR CHARGER, NO
USER-SERVICEABLE PARTS INSIDE.

hearing amplifier failure self-checking table
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Hearing has
changed
Earwax in
ear dome
Contact you hearing care
professional
Clean out any debris from
the ear domes and receiver
area with the cleaning brush Reinsert the hearing
amplifier into the
charging case
Poor contact
between hearing
amplifier and
charging case
Indicator light of
hearing amplifier
does not light
up when
hearing amplifier
placed in
charging inserts
Hearing
amplifier
indicator lights
are dark or dim
Hearing amplifier
not inserted
correctly into
charger
Battery fully
discharged
Battery fully
discharged
Dirty charging
contacts
Charger not
connected to
power source
Insert hearing amplifier
correctly into charger
Connect charger to
external power supply
Clean the contacts of the
hearing amplifier and the
charger
Connect USB cable to charge
Charging does
not start
Hearing amplifier
not inserted
correctly
into charger
Insert hearing amplifier
correctly into charger
Possible Causes SOLUTIONS
Hearing
amplifier
not loud
enough,
unclear
or distorted
Hearing amplifier
not inserted
correctly into ear
Ear domes are
too loose
Volume too loud
Insert hearing amplifier
correctly
Hearing amplifier not
inserted correctly into ear ,
wear it correctly
Decrease volume if volume
control available
Hearing amplifier
not inserted
correctly into
charger
Insert hearing amplifier
correctly into charger
Hearing
amplifier too
loud
Hearing
amplifier
whistles
[Fault self-
check] project
Wait five hours after placing
hearing amplifier in
charger,regardless of LED
behavior

Charging case fault self-checking table
*Note: If the problem persists, contact your hearing care
professional for assistance.
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Hearing
amplifiers
whistling in
the charger
Charger battery
depleted
Incorrect
orientation
Ensure the USB cable is
connected to the Charging
case plugged into power.
The Case power status
lights will shows a solid
blue to indicate charging.
Reposition your hearing
amplifiers in their slots,
ensuring the contact points
are touching the charge
points in the case.
It will take practice, time, and patience for your brain to adapt
to the new sounds that your hearing amplifiers provide.
Hearing is only part of how we share thoughts, ideas and
feelings. Reading lips, facial expressions, and gestures can
help the learning process and add to what amplification alone
may miss.
Please review the following simple communication tips:
For You
- Move closer to and look at the speaker
- Sit face-to-face in a quiet room if possible
- Try out different locations to find the optimal places to
listen
- Minimize distractions
- Background noises may be frustrating at first; remember,
you have not heard them for a while
- Let others know what you need; keep in mind that people
cannot “see” your hearing loss
- Develop realistic expectations of what your hearing
amplifiers can and cannot do
VIII.TIPS FOR BETTER COMMUNICATION

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IX.TECHNICAL SPECIFICATION
Charging Case;1
Hearing Amplifier: 2
Ear Dome: 6
Cleanning Tools: 1 Manual: 1
USB Cable: 1
Adapte：1
Input：100-240V~50/60Hz 0.2A
Output：5V 1A 5W
* Optional accessories list:
X.Accessories List
Output. OSPL90 Max.
High frequency average OSPL90
EQ Input Noise
Total Harmonic Distortion
Frequency Range(Not narrower than )
Working Current
≤125dB+3dB
≤29dB+3dB
≤7%+3%
10mA
400Hz-4000Hz
114dB±4dB
- Better hearing with hearing amplifiers is a learned skill
combining desire, practice, and patience. You will learn and
adjust, it just takes a little time. Remember to be patient with
yourself.
For Your Family and Friends
Your family and friends are also affected by your hearing loss.
Request that they:
- Get your full attention before beginning to speak
- Look at you or sit face-to-face
- Speak clearly and at a normal rate and level; shouting can
actually make understanding more difficult
- Rephrase rather than repeat the same words; different words
may be easier to understand
- Minimize distractions while speaking
Item
Charging case Input voltage
Charging case Input current
Charging case Output current
Charging case Output voltage
Charging Case
d.c.5.0V
1A
≤40mA
d.c.4.2V
Operating temperature/humidity
Storage temperature/humidity
-10℃~+40℃(14℉-104℉),
≥30%RH,≤75%RH
-10℃~+55℃(14℉-131℉),
≥10%RH,≤90%RH

Follow operating instructions
B type applied part
Disposal in accordance with Directive
2002/96/EC (WEEE)
Date of manufacture
Serial number
CE Labeling
This product satisfies the requirements of the applicable
European andnational directives
Warning/ Danger: Improper use might cause serious injuries.
Test Condition:
Water flow rate: (12.5+-5%) L/min
Test time: at least 3 min
After the test, the PCB board of the product is allowed to
into water, but the product function is normal.
IPX5
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XI. NORMALIZED SYMBOLS
Maintenance
1) We do not authorize any institution or individual to maintain
and/or repair the product. If you suspect that the products may
be in question, please contact us immediately.
2) The user must not attempt any repairs to the device or any
of its accessories. Please contact us for any repair needs.
3) Opening of the equipment by unauthorized agencies is not
allowed and will terminate any claim to warranty. Warning: No
modification of this equipment is permitted.
Storage
1) Always store your devices in the Charging Case when not in
use.
2) Do not store or expose the devices and/or case to extreme
hot/cold temperatures, moist/humid environments, or
shock/vibration.
3) Keep the devices and case in following environmental
ranges: -10℃～55℃, 10%-90%RH, 700-1060 hPa
Disposal
Please dispose of the device in accordance with the
directive 2002/96/EC – WEEE (Waste Electrical
and Electronic Equipment). If you have any
questions, please refer to your local authority
responsible for waste disposal.
XII．MAINTENANCE, STORAGE, AND DISPOSAL
Permissible storage and transport temperature
and humidity
Permissible operating temperature and humidity

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This limited warranty covers defects in material and
workmanship for a period of two (2) years from the date of
purchase, which includes the hearing devices, charger case,
and cord within the warranty period.
Any damage caused by improper handling and care, exposure
to elements or chemicals, or unauthorized service will not be
covered by the warranty. All other damage claims excluded. A
warranty claim must be submitted with the purchase receipt.
XIII.WARRANTY
Huizhou Jinghao Medical Techology Co., Ltd.
Address: Floor 6, Huicheng Industry Building, No.9 Huifeng
Dong’er Road, Zhongkai High-tech Zone, Huizhou City,
Guangdong Province, China.
Tel: [phone]
Email: [email protected]