Sennheiser HDA 280 User manual

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 10k200 500 1k 2k 5k

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 Ω

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 10k200 500 1k 2k 5k

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 Ω

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

yEar cushions

yHeadband padding

yConnecting cable

Replacing the ear cushions

왘Grasp behind the ear cushions and pull them up and away from the earcups.

왘Slide the new ear cushions onto the earcups.

Replacing the headband padding

왘Pull the Ziploc type fastening strips of the headband padding apart, as shown in the diagram

on the left, and remove the worn headband padding.

왘Put the new headband padding around the headband.

왘Pull the two edges of the headband padding together so that the fastening strips slightly

overlap.

왘Join the fastening strips.

Replacing the connecting cable

왘Remove the ear cushion. Grasp behind the ear cushion and pull it up and away from the earcup.

왘Loosen the screw and remove it.

왘Remove the cover from the earcup .

왘Pull the connector out of the socket.

왘Remove the strain relief of the connecting cable from the holding device .

왘Insert the strain relief of the new connecting cable into the holding device.

왘Plug the connector of the new connecting cable into the socket as shown in the diagram on

the left.

왘Put the cover back onto the earcup .

왘Replace the screw and tighten it.

왘Slide 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

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