MDHearing OHM User manual

User Manual
OHM
v05.20

Congratulations
With the OHM, you are back in control of the sounds
around you, thanks to digital, rechargeable technology,
paired with user-adjustable controls.
Please read this User Manual in its entirety.
Practice and patience are important as your ears relearn
how to hear. Your results, and improved quality of life,
will depend on your hearing, your expectations, and
your frequency of use.
“
Very user friendly
and great quality! Not
having to worry about
batteries is a big plus.
— Betsy C.

We’re here to help.
Our U.S.-based hearing instrument specialists are
the heart and soul of MDHearing. They’re happy
to guide and assist you with any questions you
may have. Take advantage of our free one-on-one
phone consultations.
“
The customer
service has been
outstanding. They
continue to solve
the problem and
give solutions.
— Joan P.
800-823-9819
Mon.—Fri. 8:00am—4:30pm (CST)
[email protected]
24 hours a day, 7 days a week

Package Contents...........2
OHM Diagram ..............3
Quick Start Guide ...........4
Charge ....................5
Turn On....................7
Place On Ear ...............8
Adjust Volume..............9
Program Selection .........10
Care and Cleaning .........11
Replacing Tips and Tubing..13
Troubleshooting ...........17
Warranty and Repair .......21
Return Policy..............23
Warnings .................25
Technical Specifications ....26
Table of Contents Package Contents*
*Contents will vary depending on quantity ordered.
c) Cleaning Tool Wire Magnet Brush
a) OHM Device(s) b) Charger
Thin Tubing
ComfortTIP™
Dock
Cord
Power
Adapter
2

OHM
Body
OHM Diagram
Microphones
Program Button
& Charging Light
(on/o control)
Thin Tubing
OHM comes assembled for your convenience.
ComfortTIP™
Tubing Base
Volume Dial
Stabilizer Bar
Snap End
Charging Port
Le OHM in
le hand.
Right OHM in
right hand.
Quick Start Guide
Three Easy Steps for Using Your MDHearing OHM
If you have a pair, first identify the le and right device.
Step 1: Charge OHM
Step 2: Turn OHM on
Step 3: Place OHM on ear
To identify le/right OHM: Hold an amplifier upright in each hand, with controls facing
you. The tips/tubing point toward each other when in the correct hand.
3 4

1
a) Plug charging dock into a standard outlet.
b) Place OHM on the charging dock. Blue light
will turn on.
c) When fully charged, blue light will turn green
and OHM is ready to use.
*b)
a)
c)
Charger Information
The charging dock is magnetic—simply place OHM
on it forward or backward. It will turn o automatically
and start to charge. A sensor stops the charging
process once the battery is full, so there is no risk
of battery degeneration if OHM is le on the charger.
Charger Assembly:
The charger is made up of three pieces: a cord,
a power adapter, and a charging dock.
1. Connect charging dock to the small end of the cord.
2. Connect the other end of the cord (USB) to the power adapter.
Blue Light = Charging
Green Light = Fully Charged
Light O = Not Charging
*It takes approximately 3–3.5 hours to fully charge the OHM.
On average, a full charge lasts 18–22 hours.
1)
2)
Charging
Dock
Cord
(small end)
Cord
(USB end)
Power
Adapter
Step 1: Charge OHM
Please note: If the charging light on OHM turns red,
unplug and replug in the charging dock.
5 6

3
ý
þ
Step 3: Place On Ear
Prevent ComfortTIP™from coming o in ear.
Always verify the tip is pushed all the way on
tubing before inserting tip in ear.
a) Hold thin tubing at the stabilizer bar
junction. Insert ComfortTIP with gentle
pressure into ear canal.
b) Place OHM body behind ear. The curve of
thin tubing should rest on top of your ear
comfortably (next to glasses).
c) Tuck stabilizer bar in the outer bowl of ear.
It may be trimmed to suit the size of your ear.
b)
a)
c)
2
Step 2: Turn On
The OHM’s program button also functions as
the on/o control.
• ON: Press and hold the program button for
2–3 seconds. The light will flash green once
when turned on.
• OFF: Press and hold the program button for
2–3 seconds. The light will flash blue once
when turned o.
OFF
ON
Flashes
green
Flashes
blue
7 8

Program Selection
To change programs, press the program button.
Beeps will indicate a program change.
Experiment with these programs at various volumes
to find what combinations work best for you.
Watching TV and time with family at home.1. Quiet*
Program Best For
Adjust Volume
The OHM uses a volume dial with numbers from
1 (minimum) to 4 (maximum).
• To increase volume, rotate volume dial up.
• To decrease volume, rotate volume dial down. Decrease
Increase
Caution! To avoid a sudden blast of sound, please
raise the volume SLOWLY.
Please note: Whistling may be heard if the OHM is
turned on but not positioned securely in your ear.
Once the ComfortTIP is properly inserted, whistling
will stop.
Beeps
2. Social
3. Noisy
4. Restaurant
1 beep
2 beeps
3 beeps
4 beeps
Small group meetings, church, time with friends.
Large crowds, restaurants, traic, nature sounds,
or high octave music.
Reduce background noise in any loud
environment and hear directly in front of you.
*Program 1 is the default setting. When OHM is turned o, it will reset to Program 1.
9 10

Care and Cleaning
Daily Cleaning:
Use the cleaning tool brush to
remove debris from ComfortTIP™,
microphones, and buttons.
Regular Cleaning:
Use the cleaning tool wire to remove debris from tubing.
a) Remove tubing (see page 14).
b) Thread wire through
tubing base and out of tip.
c) Wipe end of wire clean
and repeat as necessary.
d) Reattach tubing to OHM body.
Tips for optimal performance:
• Avoid physical shock, such as dropping it on the floor.
• Store in a cool dry place, such as a hearing aid dehumidifier.
• For maximum battery life, charge OHM until blue light turns
green with each charge.
• Do not let your OHM get wet.
• Do not use hair spray or a hair dryer while wearing your OHM.
• Do not expose your OHM to excess moisture or heat.
ComfortTIP Microphone Buttons
11 12

a)
Left
Right
Replacing Parts
Tips and tubing are le and right ear specific.
Thin Tubing:
The blue label indicates le ear.
The red label indicates right ear.
ComfortTIPs™:
Le ear tips curve the le.
Right ear tips curve to the right.
Replacing Tubing
a) Remove tubing: Rotate tubing base 90°
and slide o.
b) Attach tubing: Gently push new tubing on.
c) Make sure tubing base is flush with sides of
OHM body when you are finished. b)
c)
Left Right
If you require a dierent size, you’re not getting
enough volume, or you’re experiencing whistling
at higher volumes, please call 800-823-9819 for
alternative options.
Please note: Thin tubing is le
and right ear specific.
13 14

ý
Please note: ComfortTIPs™are le
and right ear specific.
Replacing Tips
a) Remove tip: Hold tubing with one hand and
pull ComfortTIP™o with other hand.
b) Attach tip: Align new ComfortTIP so the vented
end is lined up with the stabilizer bar. Push tip over
the ridges on the end of tubing.
c) IMPORTANT: The end of the tubing should be
visible through the opening of the ComfortTIP.
Otherwise, tubing may detach from tip when
removing OHM from your ear.
Vented
End
Stabilizer
Bar
b)
a)
c)
For optimal performance, proper care and maintenance are imperative.
In addition to regularly cleaning your tubing and tips, you should also
replace them every three (3) months.
Over time, these items wear out and may become sti, aecting both fit
and sound quality. Regular replacement will keep your OHM sounding
and feeling like new.
Ordering Replacements
Visit www.MDHearingAmp.com or call 800-823-9819
to order tubing, tips, and other accessories.
15 16

Troubleshooting Sound is distorted or intermittent.
• Trapped moisture may be distorting
the sound. Consider using a hearing
aid dehumidifier overnight.
• Lower the volume.
• Turn OHM o. Charge until blue light
turns green and turn OHM back on.
• Remove tubing from OHM body
(see page 14) and rotate volume dial
to four (4). If it whistles, your OHM is
working and wax or debris may be
blocking the sound.
• Clean tubing/tip (see page 11) and
ear canal. Replace tubing/tip if they
appear worn.
For optimal performance, tubing and tips should be replaced every three
(3) months. To order replacements and additional cleaning accessories,
visit www.MDHearingAmp.com or call 800-823-9819.
Charge OHM
Adjust volume
Use dehumidifier
Clean ear canal
Clean tubing/tip
Change tubing/tip
Turn OHM on
Intermittent or
distorted sound
Feedback/
whistling
Weak or
no sound
Issue:
Action Steps:
For more detailed troubleshooting tips, see the following pages.
17 18

Device has a weak or no sound.
• Trapped moisture may be distorting
the sound. Consider using a hearing
aid dehumidifier overnight.
• Make sure the OHM is on (see page 7).
• Make sure OHM is charged. If unsure,
turn OHM o and charge until blue
light turns green. Turn OHM back on.
• Remove tubing from OHM body
(see page 14) and rotate volume dial
to four (4). If it whistles, your OHM is
working and wax or debris may be
blocking the sound.
• Clean tubing/tip (see page 11) and
ear canal. Replace tubing/tip if they
appear worn.
Device makes a whistling sound.
• Whistling (feedback) occurs when
amplified sound returns to the
microphone and is re-amplified.
• Most amplifiers whistle when not
inserted properly. Try reinserting the
ComfortTIP™into your ear canal so it
fits better.
• Lower the volume.
• If whistling occurs when raising the
volume, you might need more gain
and should try our closed ComfortTIP.
Call us at 800-823-9819.
• Wax or debris can cause whistling.
Clean tubing/tip and ear canal, and
replace tubing/tip if they appear worn.
Please note: When an object (hand, hood, person, wall, etc.) comes close to your
ear while wearing amplifiers, you may experience whistling. This is normal for all
microphones, not just microphones in amplifiers.
If you are still having diiculty, please contact us at
800-823-9819 or [email protected]om.
19 20

Warranty and Repairs Repair Mailing Guidelines
The MDHearingOHM is covered against defects in materials and workmanship for
90 days from the date you receive your order. If our examination determines that the
unit failed to work due to parts, materials, or workmanship, we will repair or replace
it for free. This warranty does not cover malfunctions due to unusual wear and tear or
mistreatment of your OHM, such as physical shock, damage from moisture or sweat,
excessive wax build-up, or tampering with the device, all of which void the warranty.
If you require Warranty or Repair Service, please contact us for a Return Merchandise
Authorization (RMA) number, repair costs (if applicable), and instructions.
Do:
• Send ONLY the OHM body
• Use a small padded envelope
• Write RMA number on the
OUTSIDE of envelope
DON’T send:
• Carrying case
• Packing materials
• Charger or other accessories
(unless otherwise instructed)
Repair Facility:
RMA #
MDHearing
PO Box 5014
Southfield, MI 48086
For fastest service, e-mail:
[email protected]om
Or, call: 800-823-9819
Oice hours: Monday to Friday,
8:00 am to 4:30 pm (CST). Do not mail to this address
without an RMA number.
21 22

Return Policy
Your satisfaction is guaranteed. If you are not satisfied with your
MDHearing OHM, you have 45 days to return it for a full refund.
We are unable to honor return requests aer 45 days from the date of
purchase as shown on your invoice.
All products MUST include a Return Merchandise Authorization (RMA)
number for proper processing. Products returned without an RMA number
will incur a twenty percent (20%) No-RMA Fee.
For an RMA number and specific return instructions, please call
Customer Service: 800800-823-9819, Mon.–Fri., 8:00 am–4:30 pm (CST).
Return Facility:
RMA #
MDHearing
PO Box 5014
Southfield, MI 48086
Days from
Invoice
Amount Refunded
100%
No Refund
80%
No Refund
1-45
46+
without RMAwith RMA
You must contact customer service
for an RMA number before mailing
to this address.
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A
B
C
D
1
2
3
4
Your serial number:
Serial No.
Technical Specications
(You can find your OHM serial number on the
back of the device.)
MAX OSPL90 ...................120 dBSPL
HF Average OSPL90 .............110 dBSPL
HFA Full-on-gain ................38 dBSPL
THD@ .........................500 Hz 2%
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800 Hz 2%
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1600 Hz 2%
EQUIV INPUT NOISE .................25 dB
Warnings
Personal sound amplification products (PSAPs) are intended to amplify environmental
sound for non-hearing impaired consumers. They are not intended to compensate for
hearing impairment. Examples of situations in which PSAPs typically are used include
hunting (listening for prey), bird watching, listening to lectures with a distant speaker,
and listening to so sounds that would be diicult for normal hearing individuals to
hear (e.g., distant conversations, performances). PSAPs are not intended to diagnose,
treat, cure or mitigate disease and do not alter the structure or function of the body.
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