Sennheiser Headphones HDA 280 User Guide

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  
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  
 
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  
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  
 
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 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  
Telefon +49 (5130) 600-0  
Telefax +49 (5130) 600-300  
Printed in Germany  
92106 Publ. 06/03  
 

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