Sennheiser SH350 - Manual

5 • With the NoiseGard™ active noise compensation turned off, the headset can be usedas a conventional headset • Power supply for NoiseGard™ is provided via on-board power supply system,cigarette lighter socket or battery pack • Fail safe operation in case of power failure • Supply voltage for the N...

8 Delivery includes HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsets • Headset • 3-pin XLR socket for aircraft panel mounting (power supply via the on-board system) • Padded carry and storage bag with shoulder strap for headset and accessories • Wind screen for microphone (except HMDC ...

9 Recommended accessories Replaceable gel ear cushions (Cat. No. 092807) BP-04 battery pack (Cat. No. 500357) (except for HMEC 352, HMEC 355 and HMEC 356) Battery pack with XLR-3 socket for powering the NoiseGard™ electronics of theHMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsets. Four...

10 Connecting the headsets Connecting cables for headsets HMEC 350 and HMEC 450 headsets: 1 ¼” (6.35 mm) stereo jack plug for connecting the headphones 1 PJ-068 jack plug for connecting the microphone 1 XLR-3 plug for connecting the power supply for the NoiseGard™ electronics HMEC 352 headset: 1 ¼” ...

12 Connector assignment Redel connector (NoiseGard™) XLR-3 connector (NoiseGard™) XLR-5 connector 1 Power supply NoiseGard™ (DC+) 1 Power supply NoiseGard™ (DC+) HMEC 355 HMEC 355-C 2 Audio Lo / DC – 2 Ground 1 Audio Hi 1 Audio Hi 3 Audio Hi left 3 – * 2 Audio Lo / DC – 2 Audio Lo 4 Audio Hi right 3...

13 Powering options There are three options for powering the NoiseGard™ active noise compensation: 1. Connection to the on-board system (12–35 V DC) 2. Connection to the BP-04 battery pack (accessory, except for HMEC 352, HMEC 355 and HMEC 356) 3. Connection to the cigarette ligther socket (12–35 V ...

14 1. Connecting the headset to the on-board system The NoiseGard™ electronics can be connected to on-board power supply systems withoperating voltages between 12–35 V DC. Danger of short circuit! Before turning on NoiseGard™, ensure that the on-board power supply system isprotected by a 1 A fuse. T...

16 2. Connecting the headset to the battery pack (except HMEC 352, HMEC 355 and HMEC 356) The NoiseGard™ electronics of the HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 andHMDC 372 headsets can also be powered via the BP-04 battery pack (see“Recommended accessories” on page 9). The battery pack can be o...

18 3. Connecting the headset via a cigarette lighter adapter cable (except HMEC 352, HMEC 355 and HMEC 356) Sennheiser offers special adapter cables with XLR-3 socket for connecting the NoiseGard™electronics of the HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsetsto the on-board power s...

19 Preparing the headsets for use Adjusting the headband For good noise attenuation and best possible comfort, the headband has to be adjustedto properly fit your head: 왘 Wear the headset so that the headband runs over the top of your head. 왘 Adjust the length of the headband so that • your ears are...

20 Positioning the microphone Relocating the microphone boom The microphone boom can be worn on either side of the mouth. 왘 Loosen the quick-fixing device. 왘 Rotate the microphone boom by 180°. 왘 Tighten the quick-fixing device. Positioning the microphone towards the corner of the mouth The HMEC 350...

21 For positioning the microphone of the HMDC 372 headset, proceed as follows: 왘 Adjust the length of the microphone boom so that the microphone is placed at thecorner of the mouth. To do so, loosen the quick-fixing device and adjust themicrophone boom in length. 왘 Pull the middle part of the microp...

22 Using the headsets Turning NoiseGard™ on/off With the NoiseGard™ active noise compensation turned off, the headset can be used asa conventional headset. Turn on the NoiseGard™ active noise compensation by setting the ON/OFF switch to“ON”. When using the BP-04 battery pack, set the NoiseGard™ ON/O...

24 Spare parts The following spare parts are available from your Sennheiser agent: • Wind screen for MKE 45-1 Cat. No. 075823 • Ear cushions for all variants except HMEC 450 Cat. No. 077966 • Ear cushions for HMEC 450 Cat. No. 085764 • Soft ear cushions for HMEC 450 Cat. No. 089382 • Headband paddin...

25 Replacing the headband padding Replace the headband padding if it is damaged. 왘 Pull the Ziploc type fastening strips of the headband padding apart and remove theworn headband padding. 왘 Put the new headband padding around the headband. 왘 Pull the two edges of the headband padding together so tha...

26 Valuable information on NoiseGard™ The NoiseGard™ principle One of the greatest stress factors today is noise. Research has shown that noise affectsthe nervous system, and can cause tiredness, poor concentration, irritability and tension.Of even greater concern is the permanent damage to hearing ...

28 In case of difficulty If problems occur that are not listed in the below table, please contact your Sennheiseragent. Problem Possible cause and what to do Clear communication but no active noise compensation The NoiseGard™ electronics are turned off. 왘 Check to see if the ON/OFF switch is set to ...

30 Technical data HMEC 350 HMEC 352 HMEC 356 HMEC 450 Headphones Transducer principle dynamic Ear coupling circumaural, closed Frequency response 45–15,000 Hz Nominal impedance active/passive 300/150 Ω , mono 600/300 Ω , stereo Attenuation (active and passive) > 25–40 dB Max. sound pressure level...

31 HMEC 350 HMEC 352 HMEC 356 HMEC 450 General data Connecting cable 1.5 m, unilateral Weight without cable 370 g Power supply for NoiseGard™ 12–35 V DC Current consumption 27 mA (zero signal current), max. 80 mA Fuse 500 mA thermo fuse Connectors 6.35 mm stereo jack plug 6.35 mm stereo jack plug 6-...

Sennheiser electronic GmbH & Co. KG 30900 Wedemark, Germany Phone +49 (5130) 600 0 Fax +49 (5130) 600 300 www.sennheiser.com Printed in Germany Publ. 04/05 512743 / A04