Sennheiser HDA 300 User manual

HDA 300
EN Instruction manual
Audiometric headphones
HDA300_UmschlagAufklapp_Rückendraht.indd 2 22.10.2018 11:06:34

Contents
HDA 300 | 1
Contents
Introduction ................................................................................................. 2
About this instruction manual .................................................................. 2
Manufacturer .............................................................................................. 2
Important safety information ..................................................................... 3
Intended use/Liability ................................................................................ 4
User qualification ....................................................................................... 4
Patient/test person groups ....................................................................... 4
Environmental conditions for use ............................................................ 5
Package contents ........................................................................................ 5
Product overview ........................................................................................ 6
Connecting the HDA 300 to an audiometer and calibrating the HDA 300 .... 7
Calibration specifications and intervals ................................................... 7
Connecting the HDA 300 to an audiometer ............................................. 7
Preparing the HDA 300 for calibration ..................................................... 7
Using the HDA 300 ...................................................................................... 8
Storing the HDA 300 ................................................................................... 9
Cleaning and maintaining the HDA 300 ................................................... 10
Replacing the ear pads .............................................................................. 11
Replacing the headband paddings ........................................................... 11
Replacing the diaphragm covers ............................................................. 12
Specifications ............................................................................................. 13
Manufacturer declarations ........................................................................ 14

Introduction
2 | HDA 300
Introduction
About this instruction manual
This instruction manual describes the HDA 300 audiometry headphones.
The HDA 300 audiometry headphones are designed as an accessory for
2-channel audiometers to diagnose hearing loss. For correct use, also
observe the instruction manual/product documentation of the audiometer
used.
This manual is also available online in other languages at
www.sennheiser.com/download.
Manufacturer
Contact your local Sennheiser partner: www.sennheiser.com >
“Service & Support”.
Sennheiser electronic GmbH & Co. KG
Am Labor 1
30900 Wedemark
Germany
Phone: [phone]
Fax: [phone]
Internet: www.sennheiser.com

Important safety information
HDA 300 | 3
Important safety information
▷Read this instruction manual carefully and completely before using the
product.
▷Always include this instruction manual when passing the product on to
third parties.
▷Do not use the product if it has been obviously damaged or dropped, or
subjected to other severe shocks, as this may falsify the measurements.
▷To ensure correct measurements on the patient, use the product only in
calibrated state and perform a functional check and a visual inspection
for obvious defects before each measurement.
Preventing damage to health and accidents
▷For reasons of hygiene, only use the headphones on intact skin.
▷Before using the headphones, adjust the volume to a low level.
Avoid listening at high volume levels for long periods of time to
prevent hearing damage.
▷The product generates stronger permanent magnetic fields
that could cause interference with cardiac pacemakers,
implanted defibrillators (ICDs) and other implants. Always
maintain a distance of at least 3.94"/10 cm between the product com-
ponent containing the magnet and the cardiac pacemaker, implanted
defibrillator, or other implant.
▷Keep the product, accessories and packaging parts out of reach of chil-
dren and pets to prevent accidents. Swallowing and choking hazard.
Preventing damage to the product and malfunctions
▷Always keep the product dry and do not expose it to extreme tempera-
tures (hairdryer, heater, extended exposure to sunlight, etc.) to avoid
corrosion or deformation.
▷Refer all servicing to qualified service personnel. Servicing is required
when the product has been damaged in any way, such as cable is dam-
aged, liquid has been spilled or objects have fallen into the product,
when the product has been exposed to rain or moisture, does not oper-
ate normally, or has been dropped.
▷Use only attachments/accessories/spare parts supplied or recom-
mended by Sennheiser.

Important safety information
4 | HDA 300
▷Clean the product only with a soft, dry cloth. Skin-contacting parts of
the headphones such as the headband paddings and the ear pads can
be cleaned with disinfectants recommended by Sennheiser (see
page 10).
Intended use/Liability
The HDA 300 is a pair of closed, dynamic headphones –designed for use
with 2-channel audiometers as a sound generator in aerotympanal conduc-
tion measurement. The headphones are also suitable for high frequency
audiometry.
When using the HDA 300, please observe the user qualification and the
defined groups of patients/test persons given in the following chapters.
The product is suitable for commercial use in confined spaces and, under
normal use and care (apart from usual wear and tear), is not subject to any
restriction in daily use or in its durability.
It is considered improper use when this product is used for any application
not named in this instruction manual.
Sennheiser does not accept liability for damage arising from abuse or
misuse of this product and its attachments/accessories.
User qualification
The product is designed for use by the following persons: ENT specialists,
paediatricians, hearing aid acousticians and speech therapists, as well as
experienced personnel for audiometric analysis and measurement
employed in the respective facilities.
Patient/test person groups
The product is designed for use with the following patient/test person
groups: children, adolescents and adults of different sexes from 3 years.
There must be no anomalies, open wounds or jewelry worn around the
head and ears that could interfere with the proper fit of the headphones.
With children, the use is limited by the head width in the area of the ears,
as it determines the contact pressure of the ear pads.

Package contents
HDA 300 | 5
Environmental conditions for use
Observe the following environmental conditions, which are necessary for
the safe use of the product.
For exact measurements, the audiometry headphones and the audiometer
used must be calibrated:
Package contents
Operating
temperature
Operating
humidity
Use and store dry
only
Follow the
instruction manual
HDA 300 audiometry headphones
1 pair of HZH 350 hygiene pads
Instruction manual
Online you can find this detailed instruction manual and additional
information (www.sennheiser.com/download)
A list of accessories can be found on the HDA 300 product page at
www.sennheiser.com. For information on suppliers, contact your
local Sennheiser partner: www.sennheiser.com >
“Service & Support”.
Some of the available accessories:
• HZH 350 hygiene pads
•Earpads
•Diaphragmcover
• Open-ended connection cable
• XL headband paddings for small head sizes
• Adapter ring for easy alignment during calibration
+15 °C
+40 °C
10 %
80 %
Manual

Product overview
6 | HDA 300
Product overview
▷Before wearing the headphones, remove the protective foil Afrom the
Sennheiser logo.
1Headband padding
2Headband
3Serial number (inside of headband)
4Left ear cup (L), blue
5Ear pads
6Diaphragm cover
7Right ear cup (R), red
8Right plug, red
9Left plug, blue
0Connection cable
1
6
7
4
2
3
5
8
9
A
:

Connecting the HDA 300 to an audiometer and calibrating the HDA 300
HDA 300 | 7
Connecting the HDA 300 to an
audiometer and calibrating the
HDA 300
Calibration specifications and intervals
For exact measurements, the audiometry headphones and the audiometer
used must be calibrated by an authorized specialist during putting into
operation and regularly during operation, at least once a year.
If you replace the audiometry headphones and/or the audiometer (even
with the same type), the components must be recalibrated. This also
applies to extreme climatic changes.
Connecting the HDA 300 to an audiometer
▷Connect the red plug of the headphones to the right channel and the
blue plug to the left channel of the audiometer.
Preparing the HDA 300 for calibration
The reference threshold sound pressure levels can be found on the fold-out
front cover page or on the HDA 300 product page at www.sennheiser.com.
1. Adjust the HDA 300 as shown in the diagram.
2. Place the ear cup on the center of the coupler so that the distance to the
top and bottom as well as to the left and right is identical.
For easy alignment of the ear cup on the coupler plate of the ear sim-
ulator, you can use the optional adapter ring. Information can be
found on the HDA 300 product page at www.sennheiser.com.
145 mm
143 mm
b b
a
a

Using the HDA 300
8 | HDA 300
Using the HDA 300
1. Pull new HZH 350 hygienic pads over the right and the left ear pad to
ensure hygiene when using the HDA 300 on the test person.
2. Take off glasses, earrings and similar objects which could interfere with
the proper fit of the headphones. Put the headphones on the test person
so that the red ear cup Rcovers the right ear and the blue ear cup L
covers the left ear.
3. Adjust the ear cups and the headband of the headphones so that
– the ears are completely covered by the ear pads,
– the test person feels even, gentle pressure around the ears,
– a snug fit of the headband on the head is ensured.
*Right ear cup R, red
WARNING
Danger of hearing damage due to high volumes!
Listening at high volume levels for long periods of time can
lead to permanent hearing defects.
High volume levels can lead to cross-hearing (high sound pres-
sures are transmitted unintentionally from one ear to the other
ear) and falsify the measurement results.
▷Before putting the headphones on and before toggling
between audio sources, adjust the volume to a low level.
▷Do not continuously expose yourself or the test person to
high volume levels.
▷Use narrow-band masking noise to avoid cross-hearing.
If the headband cannot be adjusted smaller to fit the head (see
page 11), use the XL headband paddings for small head sizes (avail-
able as accessories).
R
*
123

Storing the HDA 300
HDA 300 | 9
To ensure hygiene for each test person after use:
▷Remove the hygiene pads (disposable) and dispose of them.
▷Disinfect the skin-contacting parts of the headphones (see page 10).
Storing the HDA 300
▷Do not store the headphones stretched out for long periods as this can
widen the headband and reduce the contact pressure of the head-
phones.
▷Make sure that the headphone cable does not cross any passageway to
avoid anyone tripping over the cable.
▷Handle the headphones and the cable with care. Do not twist, damage
or kink the cable.