HDA 280
Audiometrie-Kopfhörer
Die Bauart des HDA 280 ist von der Physikalisch-Technischen
Bundesanstalt geprüft. Der Kopfhörer entspricht IEC 60645-1.
Wichtig!
Der HDA 280 ist für den Betrieb mit einem Audiometer be-
stimmt! Beim Austausch von Audiometrie-Kopfhörern muss das
Audiometer neu kalibriert werden!
Frequenzgang
Messung auf B&K 4152 nach IEC 60318-3
Kopfhörer-Eingangsspannung 500 mVeff
+90
+140
+95
+100
+105
+110
+115
+120
+125
+130
+135
100
10k
200
500
1k
2k
5k
Hz
dBr
Technische Daten
gemessen bei Normal-Klima: Temperatur = 20 °C,
Luftfeuchte = 50 % (rel.), Atmosphärendruck ca. 100 kPa
Art.-Nr.
9860
1 Stck.
9861
24 Stck./Karton
Wandlerprinzip
dynamisch, geschlossen
Ankopplung an das Ohr
supraaural
Übertragungsbereich
< 20 Hz bis > 20 kHz
Kennschalldruckpegel
117 dB (bei 1 kHz, 1 mW)
Max. L/R-Abweichung
125 Hz 4 kHz < 1,5 dB
4 kHz 12 kHz < 2 dB
Max. Nenn-Dauer-
eingangsleistung
500 mW (nach EN 60268-7)
Nennimpedanz
37
Bügel-Andruckkraft
5 N ± 0,5 N
Anschlusskabel
ca. 3 m lang, offenes Kabelende
Gewicht (mit Kabel)
330 g
Anschlussbelegung
grün
+ L
kupfer
L
rot
+ R
kupfer
R
Reinton-Bezugs-Schwellenschalldruckpegel
Äquivalenter Bezugs-Schwellenschalldruckpegel (re 20 µPa) für
den Kopfhörer HDA 280 und einen Kuppler nach IEC 60318-3
* zusätzliche Angaben angelehnt an ISO 389-1
Spitzen-Tal-Bezugs-Schwellenschalldruckpegel
Für Clicks, 20 Hz
an Ohrsimulator nach IEC 60318-1 und
an akustischem Kuppler nach IEC 60318-3
pe RETSPL = 31,5 dB (re 20 µPa).
Reinton-Bezugs-Schwellen-
schalldruckpegel
Max. Schalldruckpegel
an B&K 4152 < 10 Min.
Frequenz (Hz)
dB (re 20 µPa)
dB (bei 4 V)
125
38,5
143 ± 3
250
25,0
144 ± 3
500
13,0
144 ± 3
750
9,0
144 ± 3
1000
7,5
145 ± 3
1500
9,5
145 ± 3
2000
8,0
138 ± 3
3000
6,5
133 ± 3
4000
9,5
137 ± 3
6000
19,0
132 ± 5
8000
18,0
122 ± 5
10000
18,5
110 ± 5
12500
30,5
122 ± 5
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Audiometric headphones
Design approved by the PTB (German national institute for
science and technology).
The headphones comply with IEC 60645-1.
Important!
The HDA 280 is designed for use with an audiometer!
After exchanging audiometric headphones, the audiometer has
to be re-calibrated!
Pure tone RETSPL
Reference equivalent threshold sound pressure level (re 20 µPa)
for the HDA 280 headphones and a coupler as per IEC 60318-3
* additional values following ISO 389-1
Peak-to-peak RETSPL
For clicks, 20 Hz
on an ear simulator as per IEC 60318-1 and
on an acoustic coupler as per IEC 60318-3
pe RETSPL = 31.5 dB (re 20 µPa).
Pure tone reference equivalent
threshold sound pressure level
Max. SPL
on B&K 4152 < 10 min.
Frequency (Hz)
dB (re 20 µPa)
dB (at 4 V)
125
38.5
143 ± 3
250
25.0
144 ± 3
500
13.0
144 ± 3
750
9.0
144 ± 3
1000
7.5
145 ± 3
1500
9.5
145 ± 3
2000
8.0
138 ± 3
3000
6.5
133 ± 3
4000
9.5
137 ± 3
6000
19.0
132 ± 5
8000
18.0
122 ± 5
10000
18.5
110 ± 5
12500
30.5
122 ± 5
Frequency response curve
Measured with B&K 4152 as per IEC 60318-3
Headphone input voltage 500 mVrms
+90
+140
+95
+100
+105
+110
+115
+120
+125
+130
+135
100
10k
200
500
1k
2k
5k
Hz
dBr
Specifications
measured at normal climate: temperature = 20 °C,
relative humidity = 50 %, atmospheric pressure approx. 100 kPa
Cat. No.
9860
1 unit
9861
24 units/carton
Transducer principle
dynamic, closed
Ear coupling
supra-aural
Frequency response
< 20 Hz to > 20 kHz
Characteristic SPL
117 dB (at 1 kHz, 1 mW)
Max. L/R deviation
125 Hz 4 kHz < 1.5 dB
4 kHz 12 kHz < 2 dB
Max. nominal continuous
input power
500 mW (as per EN 60268-7)
Nominal impedance
37
Contact pressure
5 N ± 0.5 N
Connection cable
approx. 3 m, open-ended
Weight (with cable)
330 g
Connection code
green
+ L
copper
L
red
+ R
copper
R
*
HDA 280
Cleaning the headphones
To clean the headphones, use a soft, damp cloth. If necessary, the headphones can be cleaned with
a cloth that has been dipped in soapy water (use a mild cleanser such as washing-up liquid).
Note!
Do not immerse the headphones in water or allow the capsules to become wet.
Never use solvent-containing cleansers.
Available accessories and spare parts
Ear cushions
Headband padding
Connecting cable
Replacing the ear cushions
Grasp behind the ear cushions and pull them up and away from the earcups.
Slide the new ear cushions onto the earcups.
Replacing the headband padding
Pull the Ziploc type fastening strips of the headband padding apart, as shown in the diagram
on the left, and remove the worn headband padding.
Put the new headband padding around the headband.
Pull the two edges of the headband padding together so that the fastening strips slightly
overlap.
Join the fastening strips.
Replacing the connecting cable
Remove the ear cushion. Grasp behind the ear cushion and pull it up and away from the earcup.
Loosen the screw
and remove it.
Remove the cover from the earcup
.
Pull the connector
out of the socket.
Remove the strain relief of the connecting cable from the holding device
.
Insert the strain relief of the new connecting cable into the holding device.
Plug the connector
of the new connecting cable into the socket as shown in the diagram on
the left.
Put the cover back onto the earcup
.
Replace the screw
and tighten it.
Slide the ear cushion onto the earcup.
Sennheiser electronic GmbH & Co. KG
30900 Wedemark, Germany
www.sennheiser.com
Telefon +49 (5130) 600-0
Telefax +49 (5130) 600-300
Printed in Germany
92106
Publ. 06/03