Sennheiser HDA 300 User manual

HDA 300
Instruction manual
Audiometric headphone

Sensitivity level
on ear simulator with adapter (plate) and
conical ring according to
IEC 60318-1:2010*
on 6 ccm coupler according to
IEC 60318-3:2010
Frequency in Hz
Mean value
on B&K 4153
in dB re 1 Pa/V
Standard
deviation in dB
Mean value
on B&K 4152
in dB re 1 Pa/V
Standard
deviation
63 34.9 0.58 24.5 1.08
80 35.6 0.75 27.2 0.90
100 36.1 0.58 29.1 0.68
125 36.1 0.88 30.5 0.52
160 37.2 0.40 31.7 0.41
200 38.0 0.31 32.5 0.29
250 38.0 0.67 33.1 0.44
315 38.6 0.77 34.2 0.27
400 38.2 1.03 35.3 0.22
500 37.2 1.05 36.3 0.22
630 35.4 0.75 37.5 0.28
750 33.5 0.61 38.2 0.41
800 32.7 0.53 38.4 0.34
1000 30.1 0.28 38.8 0.61
1250 27.5 0.37 37.4 0.62
1500 25.2 0.26 36.0 0.29
1600 24.3 0.33 35.3 0.20
2000 21.1 0.52 33.2 0.58
2500 20.3 0.54 32.0 0.42
3000 20.0 0.55 29.7 0.36
3150 19.8 0.55 29.0 0.29
4000 16.3 0.46 26.7 0.14
5000 26.1 0.20 27.0 0.36
6000 26.4 0.25 28.9 0.54
6300 26.7 0.36 28.3 0.54
8000 28.1 1.56 18.4 0.74
10000 19.4 0.43
12000 24.1 0.81
12500 20.2 0.68
14000 17.5 1.04
16000 16.1 0.85
* measured with additional adapter for a quicker and more accurate positioning on coupler plate
This is optionally available from Sennheiser.
Measuring conditions
Temperature: 22 °C
Relative humidity: 50 %
Standards
Headphones comply with IEC 60645-1, IEC 60645-2, ANSI S3.6-2010

Reference equivalent threshold sound pressure level
on ear simulator with adapter (plate) and conical ring according to IEC 60318-1:2010
Frequency in Hz
Mean value
on B&K 4153
in dB re 20 µPa
Standard
deviation in dB
Median value ***
on B&K 4153 in dB
Interquartile
range in dB
125 26.2 3.9 27.0 5.5
250 20.1 3.1 20.0 4.0
500 8.6 4.0 8.0 3.5
750* 5.1 4.5
1000 2.7 4.6 2.0 4.5
1500 3.2 7.1 3.0 6.5
2000 0.5 4.5 0.0 7.0
3000 -1.6 6.0 -3.0 7.5
4000 0.1 5.4 -0.5 5.5
5000 11.3 4.4 10.5 6.0
6000 20.9 7.2 21.0 7.5
8000 23.1 6.1 23.0 6.0
9000 27.1 5.4 27.5 7.0
10000 18.5 5.7 18.0 6.0
11200 22.9 5.6 22.0 8.5
12500 27.0 5.5 27.0 10.0
14000 32.8 6.9 33.5 7.5
16000 47.7 14.4 45.5 12.5
Reference equivalent threshold sound pressure level
on 6 ccm coupler according to IEC 60318-3:2010
Frequency in Hz
Mean value
on B&K 4152
in dB re 20 µPa
Standard
deviation in dB
Median value ***
on B&K 4152 in dB
Interquartile
range in dB
125 22.3 3.9 23.0 5.4
250 14.7 3.1 14.5 4.0
500 7.4 4.0 6.5 3.5
750* 9.5 9.0
1000 11.0 4.6 10.5 4.0
1500 14.8 7.1 14.5 7.0
2000 12.3 4.5 12.0 7.0
3000 8.0 6.0 6.5 7.5
4000 10.0 5.4 9.5 5.5
5000 12.3 4.4 11.5 6.0
6000 23.0 7.2 23.0 7.5
8000 15.9 6.1 16.0 6.0
* interpolated values
*** rounded to nearest 0.5 dB

Difference between free-field sensitivity level GF and ear simulator sensitivity level GC
on ear simulator with adapter (plate) and conical ring according to IEC 60318-1:2010
Frequency in Hz Mean value on B&K 4153
in dB
Standard
deviation in dB
Median value***
on B&K 4153 in dB
Interquartile
range in dB
100** -12.6 -12.0
125 -12.2 4.4 -12.0 5.5
160* -11.7 -11.5
200* -11.3 -11.5
250 -10.9 3.9 -11.5 4.5
315* -10.9 -11.0
400 -11.0 4.3 -10.0 7.0
500 -7.8 3.5 -7.5 3.5
630* -5.4 -5.0
800* -3.0 -3.0
1000 -0.8 3.4 -1.0 3.5
1250 0.3 4.7 0.0 6.0
1600 -0.7 3.2 -0.5 5.5
2000 -2.1 4.0 -2.0 7.0
2500 -3.0 3.0 -3.0 3.0
3150 -5.2 3.1 -6.0 4.0
4000 -5.4 3.3 -4.5 6.0
5000 -11.7 3.3 -10.5 2.5
6300 -7.5 3.9 -7.0 6.0
8000 -10.1 4.5 -10.0 7.0
Difference between free-field sensitivity level GF and coupler sensitivity level GC
on 6 ccm coupler according to IEC 60318-3:2010
Frequency in Hz Mean value on B&K 4152
in dB
Standard
deviation in dB
Median value***
on B&K 4152 in dB
Interquartile
range in dB
100** -5.8 -5.0
125 -5.8 4.4 -5.5 5.5
160* -5.7 -5.5
200* -5.6 -6.0
250 -5.6 3.9 -6.0 5.0
315* -6.3 -6.0
400 -7.1 4.3 -6.0 7.0
500 -5.7 3.5 -5.0 3.5
630* -7.2 -7.0
800* -8.7 -8.5
1000 -10.2 3.4 -10.5 4.0
1250 -11.3 4.7 -11.5 6.0
1600 -13.4 3.2 -13.5 5.0
2000 -14.8 4.0 -15.0 5.5
2500 -15.2 3.0 -15.0 3.0
3150 -14.6 3.1 -15.5 4.0
4000 -14.0 3.3 -13.0 6.0
5000 -13.5 3.3 -12.0 2.0
6300 -9.2 3.9 -8.5 6.0
8000 -3.3 4.5 -3.0 7.0
* interpolated values
** extrapolated value
*** rounded to nearest 0.5 dB

Passive Attenuation
according to ISO 4869-1:1994 / EN 24869-1:1993
Frequency in Hz Mean value in dB
63 12.5
125 12.4
250 12.7
500 9.4
1000 12.8
2000 15.1
4000 28.8
8000 26.2

Contents
HDA 300 | 1
Contents
Important safety information .................................................................................. 2
Package contents ....................................................................................................... 3
Product overview ....................................................................................................... 4
Connecting the HDA 300 to an audiometer and calibrating the audiometer ... 5
Storing the HDA 300 .................................................................................................. 5
Using the HDA 300 ..................................................................................................... 6
Cleaning and maintaining the HDA 300 ................................................................. 7
Replacing the ear pads ............................................................................................... 8
Replacing the headband paddings .......................................................................... 8
Replacing the diaphragm cover ...............................................................................9
Specifications ............................................................................................................ 10
Manufacturer declarations ..................................................................................... 10

Important safety information
2 | HDA 300
Important safety information
왘Read this instruction manual carefully and completely before using the
product.
왘Always include this instruction manual when passing the product on to third
parties.
왘Do not use an obviously defective product.
Preventing damage to health and accidents
왘For reasons of hygiene, never use the headphones on broken skin.
왘Reduce the volume before using the headphones. To prevent hearing damage,
avoid listening to music at high volumes over a longer period of time.
왘Always maintain a distance of at least 3.94" (10 cm) between the ear caps and
the cardiac pacemaker or implanted defibrillator since the product generates
permanent magnetic fields.
왘Keep the product, accessories and packaging parts out of reach of children and
pets to prevent accidents and choking hazards.
Preventing damage to the product and malfunctions
왘Always keep the product dry and do not expose it to extreme temperatures
(hairdryer, heater, extended exposure to sunlight, etc.) to avoid corrosion or
deformation.
왘Reduce the volume before using the headphones.
왘To prevent hearing damage, avoid listening to music at high volumes over a
longer period of time
왘Only use attachments/accessories supplied or recommended by Sennheiser.
왘Only clean the product with a soft, dry cloth. The headband paddings and
the ear pads can be cleaned with disinfectants recommended by Sennheiser
(see page 7).
Intended use/Liability
The HDA 300 is a pair of closed, dynamic headphones designed for use with
audiometers. The headphones are also suitable for high frequency audiometry.
This product can be used for commercial purposes.
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.

Package contents
HDA 300 | 3
Package contents
HDA 300 headphones
HZH 350 hygiene pads
Instruction manual
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
• Ear pads for the HDA 300
• Diaphragm covers for the HDA 300
• Open-ended connection cable for the HDA 300
• XL headband paddings for small head sizes
Manual

Product overview
4 | HDA 300
Product overview
왘Before wearing the headphones, remove the protective foil Afrom the
Sennheiser logo.
1Headband padding
2Headband
3Ear cap, left (blue)
4Ear pad
5Diaphragm cover
6Ear cap, right (red)
7Plug, right (red)
8Plug, left (blue)
9Connection cable
1
5
6
3
2
4
7
8
A
9

Connecting HDA 300 to an audiometer and calibrating the audiometer
HDA 300 | 5
Connecting the HDA 300 to an audiometer and
calibrating the audiometer
In order to obtain accurate measurements, the audiometer has to be re-calibrated
on a regular basis and each time the audiometric headphones are exchanged. This
is necessary even if you change the climatic conditions.
Connecting the HDA 300
왘Connect the red plug of the headphones to the right channel and the blue plug
to the left channel of the audiometer.
왘Have an authorized specialist calibrate the audiometer together with the
HDA 300.
Preparing the HDA 300 for calibration
You can find the appropriate reference threshold sound pressure levels on the
fold-out page of the cover or at www.sennheiser.com on the product page for the
HDA 300.
1Adjust the HDA 300 as shown in the diagram.
2Place the ear cap on the middle of the coupler so the distance to the top,
bottom, left and right is identical.
Storing the HDA 300
왘Do not store the headphones stretched out for long periods as this can widen
the headband and reduce the contact pressure of the headphones.
왘Make sure that the headphone cable does not cross any passageway to avoid
anyone tripping over the cable.
왘Handle the headphones and the cable with care. Do not twist, damage or kink
the cable.
145 mm
143 mm
b b
a
a

Using the HDA 300
6 | HDA 300
Using the HDA 300
1Pull new hygiene pads over the ear pads.
2Take off glasses, earrings and similar objects which could interfere with the fit
of the headphones. Put the headphones on the test person so that the red ear
cap covers the right ear.
3Adjust the headphones so that
– the ears are completely inside the ear pads,
– the test person feels even, gentle pressure around his or her ears,
– a snug fit of the headband on the head is ensured.
If the headband cannot be adjusted smaller to fit the head (see page 8), use
the XL headband paddings for small head sizes (available as accessories).
To ensure hygienic use:
왘Remove the (disposable) hygiene pads and dispose of them.
왘Disinfect the product regularly as instructed by the hygiene specialist (see
next section).
R
red
1 2 3

Cleaning and maintaining the HDA 300
HDA 300 | 7
Cleaning and maintaining the HDA 300
왘Clean the ear pads and the headband padding with a cloth according to the
instructions from the manufacturer of the cleansing agent.
Recommended cleansing agents and disinfectants for the ear pads and headband
padding:
왘Observe the manufacturer’s instructions. Let the product dry before using it.
왘Replace the diaphragm cover, the ear pads and the headband padding regu-
larly as instructed by the hygiene specialist (see next section).
CAUTION
Liquids can damage the electronics of the product!
Liquids entering the housing can cause corrosion.
왘Keep all liquids far away from the product.
왘Only clean the headband paddings and the ear pads with cleansing agents
recommended by Sennheiser.
왘Do not spray disinfectants directly on the product. Spray the disinfectant on to
a suitable cloth.
Manufacturer Suitable product
Bode Bacillol AF, Bacillol Tissues
Dreve OtoVita Cleaning Spray, OtoVita Cleaning Wipes
Egger Cedis, Cedis med WB, Cedis N-Pro Cleansing Spray/Tissues
Reckitt Benckiser Sagrotan hygiene spray, Sagrotan hygiene cleaner

Cleaning and maintaining the HDA 300
8 | HDA 300
Replacing the ear pads
1Peel the ear pad up and away from the ear cap.
2Slide the new ear pad onto the ear cap. Make sure that the edge of the ear pad
disappears completely in the provided groove.
Replacing the headband paddings
Replace the headband paddings if you require another size. XL headband pad-
dings for small head sizes are available as accessories.
1Lift the headband padding slightly on one end and carefully slide it out of its
holder on the headband towards the ear caps.
2Slide the new or other headband padding into the holder. Repeat for the
second headband padding.
1 2
1
2
12

Cleaning and maintaining the HDA 300
HDA 300 | 9
Replacing the diaphragm cover
1Remove the ear pad from the ear cap.
2Remove the diaphragm cover and dispose of it.
3Place the new diaphragm cover so that four of the holes in the diaphragm
cover are positioned over the four retaining pins on the ear cap. If the
retaining pins do not fit into the holes, rotate the diaphragm cover 180°.
4Pull the ear pad onto the ear cap. The edge of the ear pad should disappear
completely into the provided groove.
1 2
4
3

Specifications
10 | HDA 300
Specifications
Pin assignment of the 6.35 mm jack plug (mono)
Manufacturer declarations
Warranty
Sennheiser GmbH & Co. KG gives a warranty of 24 months on this product. For the
current warranty conditions, please visit our website at www.sennheiser.com or
contact your Sennheiser partner.
CE Declaration of Conformity
• RoHS Directive (2011/65/EC)
The declaration is available at www.sennheiser.com.
Before putting the product into operation, please observe the respective country-
specific regulations!
Frequency response 20 – 20,000 Hz
Transducer principle dynamic, closed
Nominal impedance 23 Ω
Characteristic SPL 117 dB at 1 kHz, 0.5 V
Max. nominal continuous input
power 500 mW (in accordance with EN 60268-7)
Max input voltage 3.5 V, < 10 min
Ear coupling circumaural
Contact pressure 8.8N ± 0.5N
Weight (with cable) approx. 490 g
Connection cable approx. 2.2 m, single-sided
Red plug = right side of the headphone
1 Audio High (red wire)
2 Audio Low (blue wire)
Blue plug = left side of the headphone
1 Audio High (yellow wire)
2 Audio Low (green wire)

Sennheiser electronic GmbH & Co. KG
Am Labor 1, 30900 Wedemark, Germany
www.sennheiser.com
Publ. 09/13, 545391/A01