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!
Technische Daten
Art.-Nr.
9860 1 Stck.
9861 24 Stck./Karton
Wandlerprinzip
dynamisch, geschlossen
supraaural
Ankopplung an das Ohr
Übertragungsbereich
Kennschalldruckpegel
Max. L/R-Abweichung
< 20 Hz bis > 20 kHz
117 dB (bei 1 kHz, 1 mW)
Reinton-Bezugs-Schwellenschalldruckpegel
125 Hz – 4 kHz < 1,5 dB
4 kHz – 12 kHz < 2 dB
Reinton-Bezugs-Schwellen-
schalldruckpegel
Max. Schalldruckpegel
an B&K 4152 < 10 Min.
Max. Nenn-Dauer-
eingangsleistung
500 mW (nach EN 60268-7)
Frequenz (Hz)
dB (re 20 µPa)
dB (bei 4 V)
Nennimpedanz
37 Ω
125
250
38,5
25,0
13,0
9,0
143 ± 3
144 ± 3
144 ± 3
144 ± 3
145 ± 3
145 ± 3
138 ± 3
133 ± 3
137 ± 3
132 ± 5
122 ± 5
110 ± 5
122 ± 5
Bügel-Andruckkraft
Anschlusskabel
5 N ± 0,5 N
ca. 3 m lang, offenes Kabelende
330 g
500
Gewicht (mit Kabel)
Anschlussbelegung
750
1000
1500
2000
3000
4000
6000
8000
10000
12500
7,5
grün
kupfer
rot
+ L
– L
+ R
– R
9,5
8,0
kupfer
6,5
gemessen bei Normal-Klima: Temperatur = 20 °C,
Luftfeuchte = 50 % (rel.), Atmosphärendruck ca. 100 kPa
9,5
19,0
18,0
18,5
30,5
Frequenzgang
*
dBr
+140
+135
+130
+125
+120
+115
+110
+105
+100
+95
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
+90
100
200
500
1k
Hz
2k
5k
10k
– an Ohrsimulator nach IEC 60318-1 und
– an akustischem Kuppler nach IEC 60318-3
Messung auf B&K 4152 nach IEC 60318-3
Kopfhörer-Eingangsspannung 500 mV
pe RETSPL = 31,5 dB (re 20 µPa).
eff
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HDA 280
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!
Specifications
Cat. No.
9860 1 unit
9861 24 units/carton
Transducer principle
Ear coupling
dynamic, closed
supra-aural
Frequency response
Characteristic SPL
Max. L/R deviation
< 20 Hz to > 20 kHz
117 dB (at 1 kHz, 1 mW)
Pure tone RETSPL
125 Hz – 4 kHz < 1.5 dB
4 kHz – 12 kHz < 2 dB
Pure tone reference equivalent
threshold sound pressure level
Max. SPL
on B&K 4152 < 10 min.
Max. nominal continuous
input power
500 mW (as per EN 60268-7)
Frequency (Hz)
dB (re 20 µPa)
dB (at 4 V)
Nominal impedance
Contact pressure
Connection cable
Weight (with cable)
Connection code
37 Ω
125
250
38.5
25.0
13.0
9.0
143 ± 3
144 ± 3
144 ± 3
144 ± 3
145 ± 3
145 ± 3
138 ± 3
133 ± 3
137 ± 3
132 ± 5
122 ± 5
110 ± 5
122 ± 5
5 N ± 0.5 N
approx. 3 m, open-ended
330 g
500
750
1000
1500
2000
3000
4000
6000
8000
10000
12500
7.5
green
copper
red
+ L
– L
+ R
– R
9.5
8.0
copper
6.5
measured at normal climate: temperature = 20 °C,
relative humidity = 50 %, atmospheric pressure approx. 100 kPa
9.5
19.0
18.0
18.5
30.5
Frequency response curve
*
dBr
+140
+135
+130
+125
+120
+115
+110
+105
+100
+95
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
+90
100
200
500
1k
Hz
2k
5k
10k
– on an ear simulator as per IEC 60318-1 and
– on an acoustic coupler as per IEC 60318-3
Measured with B&K 4152 as per IEC 60318-3
Headphone input voltage 500 mV
pe RETSPL = 31.5 dB (re 20 µPa).
rms
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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
y Ear cushions
y Headband padding
y 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 ᕡ and remove it.
ᕡ
̈ Remove the cover from the earcup ᕢ.
̈ Pull the connector ᕣ out of the socket.
̈ Remove the strain relief of the connecting cable from the holding device ᕤ.
̈ Insert the strain relief of the new connecting cable into the holding device.
ᕢ
̈ Plug the connector ᕣ of the new connecting cable into the socket as shown in the diagram on
ᕣ
the left.
̈ Put the cover back onto the earcup ᕢ.
̈ Replace the screw ᕡ and tighten it.
̈ Slide the ear cushion onto the earcup.
ᕤ
Sennheiser electronic GmbH & Co. KG
30900 Wedemark, Germany
Telefon +49 (5130) 600-0
Telefax +49 (5130) 600-300
Printed in Germany
92106 Publ. 06/03
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