Instructions for Use
Page 2
... use ...19 Adjusting the headband ...19 Positioning the microphone ...20 Using the headsets ...22 Turning NoiseGard™ on/off ...22 Mono/Stereo selection (except HMEC 355, HMEC 355-C, HMEC 372 and HMDC 372 22 Adjusting the volume ...22 Attaching the cable clip ...23 Folding up the headphones ...23 Spare parts ...24 Valuable information on...
... use ...19 Adjusting the headband ...19 Positioning the microphone ...20 Using the headsets ...22 Turning NoiseGard™ on/off ...22 Mono/Stereo selection (except HMEC 355, HMEC 355-C, HMEC 372 and HMDC 372 22 Adjusting the volume ...22 Attaching the cable clip ...23 Folding up the headphones ...23 Spare parts ...24 Valuable information on...
Instructions for Use
Page 3
.... For information on , you . The HMEC 350, HMEC 352, HMEC 355, HMEC 355-C, HMEC 356, HMEC 372, HMEC 450 and HMDC 372 are pilot headsets with closed ear protector headphones and NoiseGard™ active noise compensation for example, those from engines, propellers, warning alarms, etc.) may sound different to clean the headset, contact your Sennheiser agent. • Do not immerse the...
.... For information on , you . The HMEC 350, HMEC 352, HMEC 355, HMEC 355-C, HMEC 356, HMEC 372, HMEC 450 and HMDC 372 are pilot headsets with closed ear protector headphones and NoiseGard™ active noise compensation for example, those from engines, propellers, warning alarms, etc.) may sound different to clean the headset, contact your Sennheiser agent. • Do not immerse the...
Instructions for Use
Page 4
Headset features HMEC 350 NoiseGard™ headset • New active headset with effective attenuation of external noise across the entire frequency spectrum due to NoiseGard™ active noise compensation • NoiseGard™ active noise compensation provides...Improved acoustic properties: The frequency response of the headphones has been optimised in the 1 to 4 kHz region to give significantly increased speech intelligibility over the HMEC 300 series • Excellent comfort due to very low weight, soft ear cushions and padded headband as well as best possible freedom of movement due...
Headset features HMEC 350 NoiseGard™ headset • New active headset with effective attenuation of external noise across the entire frequency spectrum due to NoiseGard™ active noise compensation • NoiseGard™ active noise compensation provides...Improved acoustic properties: The frequency response of the headphones has been optimised in the 1 to 4 kHz region to give significantly increased speech intelligibility over the HMEC 300 series • Excellent comfort due to very low weight, soft ear cushions and padded headband as well as best possible freedom of movement due...
Instructions for Use
Page 5
• With the NoiseGard™ active noise compensation turned off, the headset can be used as a conventional headset • Power supply for NoiseGard™ is provided via on-board power supply system, cigarette lighter socket or battery ... Germany, 5-year warranty (HMEC 450: 10-year warranty) Product variants HMEC 352 NoiseGard™ headset The HMEC 352 differs from the HMEC 350 in the following features: • Connection of microphone and NoiseGard™ electronics via PJ-068 plug HMEC 355 NoiseGard™ headset The HMEC 355 differs from the HMEC 350 in the following features: ...
• With the NoiseGard™ active noise compensation turned off, the headset can be used as a conventional headset • Power supply for NoiseGard™ is provided via on-board power supply system, cigarette lighter socket or battery ... Germany, 5-year warranty (HMEC 450: 10-year warranty) Product variants HMEC 352 NoiseGard™ headset The HMEC 352 differs from the HMEC 350 in the following features: • Connection of microphone and NoiseGard™ electronics via PJ-068 plug HMEC 355 NoiseGard™ headset The HMEC 355 differs from the HMEC 350 in the following features: ...
Instructions for Use
Page 6
...Connection of headphones and microphone via XLR-5 plug • Connection of NoiseGard™ electronics via XLR-3 plug HMEC 356 NoiseGard™ headset The HMEC 356 differs from the HMEC 350 in the following features: • Connection of headphones, microphone and NoiseGard™ electronics to the on-board... power supply system (12-35 V DC) via 6-pin Redel plug HMEC 372 NoiseGard™ headset The HMEC 372 differs from the HMEC 350 in the following features: • No Mono/Stereo switch • Coiled cable • Connection of headphones and...
...Connection of headphones and microphone via XLR-5 plug • Connection of NoiseGard™ electronics via XLR-3 plug HMEC 356 NoiseGard™ headset The HMEC 356 differs from the HMEC 350 in the following features: • Connection of headphones, microphone and NoiseGard™ electronics to the on-board... power supply system (12-35 V DC) via 6-pin Redel plug HMEC 372 NoiseGard™ headset The HMEC 372 differs from the HMEC 350 in the following features: • No Mono/Stereo switch • Coiled cable • Connection of headphones and...
Instructions for Use
Page 7
HMEC 450 NoiseGard™ headset The HMEC 450 differs from the HMEC 350 in the following features: • Stylish silver design • Leatherette ear cushions • Headband padding can be buttoned HMDC 372 NoiseGard™ headset The HMDC 372 differs from the HMEC 350 in the following features: • No Mono/Stereo switch • Coiled cable • M-87/AIC dynamic microphone and low impedance headphones • Connection of headphones and microphone via U-174/U jack plug to a low impedance interface in the helicopter 7
HMEC 450 NoiseGard™ headset The HMEC 450 differs from the HMEC 350 in the following features: • Stylish silver design • Leatherette ear cushions • Headband padding can be buttoned HMDC 372 NoiseGard™ headset The HMDC 372 differs from the HMEC 350 in the following features: • No Mono/Stereo switch • Coiled cable • M-87/AIC dynamic microphone and low impedance headphones • Connection of headphones and microphone via U-174/U jack plug to a low impedance interface in the helicopter 7
Instructions for Use
Page 8
No. 044740) 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 372) • MZQ 2002-1 cable clip...
No. 044740) 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 372) • MZQ 2002-1 cable clip...
Instructions for Use
Page 9
... cable for powering the NoiseGard™ electronics of the HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsets. Adapter cables (except for HMEC 352, HMEC 355 and HMEC 356) Sennheiser offers special adapter cables for connecting the NoiseGard™ electronics of the HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsets to the onboard power supply via the cigarette lighter...
... cable for powering the NoiseGard™ electronics of the HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsets. Adapter cables (except for HMEC 352, HMEC 355 and HMEC 356) Sennheiser offers special adapter cables for connecting the NoiseGard™ electronics of the HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsets to the onboard power supply via the cigarette lighter...
Instructions for Use
Page 10
... for HMEC 350 and HMEC 450 Connecting cable for HMEC 352 Connecting cable for HMEC 355 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...
... for HMEC 350 and HMEC 450 Connecting cable for HMEC 352 Connecting cable for HMEC 355 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...
Instructions for Use
Page 11
Connecting cable for HMEC 355-C Connecting cable for HMEC 356 HMEC 355-C headset: 1 XLR-5 plug for connecting the headphones and the microphone 1 XLR-3 plug for connecting the power supply for the NoiseGard™ electronics HMEC 356 headset: 1 6-pin Redel plug for connecting the headphones, the microphone and the power supply for the NoiseGard™ electronics HMEC 372 and HMDC 372 headsets: 1 U-174/U jack plug for connecting the headphones and the microphone 1 XLR-3 plug for connecting the power supply for the NoiseGard™ electronics Connecting cable for HMEC 372 and HMDC 372 11
Connecting cable for HMEC 355-C Connecting cable for HMEC 356 HMEC 355-C headset: 1 XLR-5 plug for connecting the headphones and the microphone 1 XLR-3 plug for connecting the power supply for the NoiseGard™ electronics HMEC 356 headset: 1 6-pin Redel plug for connecting the headphones, the microphone and the power supply for the NoiseGard™ electronics HMEC 372 and HMDC 372 headsets: 1 U-174/U jack plug for connecting the headphones and the microphone 1 XLR-3 plug for connecting the power supply for the NoiseGard™ electronics Connecting cable for HMEC 372 and HMDC 372 11
Instructions for Use
Page 14
... can be mounted by a technician qualified to on -board power supply system is protected by a 1 A fuse. The HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsets are supplied with operating voltages between 12-35 V DC. The XLR-3 socket must be connected to perform this type of short... circuit! 1. Danger of installation. XLR-3 socket HMEC 350 and HMEC 450 headsets: ̈ Connect the ¼" (6.35 mm) stereo jack plug for the headphones and the PJ-068 jack plug for NoiseGard™...
... can be mounted by a technician qualified to on -board power supply system is protected by a 1 A fuse. The HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsets are supplied with operating voltages between 12-35 V DC. The XLR-3 socket must be connected to perform this type of short... circuit! 1. Danger of installation. XLR-3 socket HMEC 350 and HMEC 450 headsets: ̈ Connect the ¼" (6.35 mm) stereo jack plug for the headphones and the PJ-068 jack plug for NoiseGard™...
Instructions for Use
Page 15
... plug for the headphones and the microphone to the aircraft's XLR-5 socket. ̈ Connect the XLR-3 plug to the aircraft's XLR-5 socket. HMEC 372 and HMDC 372 headsets: ̈ Connect the U-174/U jack plug for the headphones and the microphone to the U-174/U socket of your intercom. ̈ Connect the... XLR-3 plug to the XLR-3 socket. 15 HMEC 355 headset: ̈ Connect the XLR-5 plug to the XLR-3 socket. HMEC 352 headset: ̈ Connect the ¼" (6.35 mm) stereo jack plug for the headphones and the PJ-068 jack plug ...
... plug for the headphones and the microphone to the aircraft's XLR-5 socket. ̈ Connect the XLR-3 plug to the aircraft's XLR-5 socket. HMEC 372 and HMDC 372 headsets: ̈ Connect the U-174/U jack plug for the headphones and the microphone to the U-174/U socket of your intercom. ̈ Connect the... XLR-3 plug to the XLR-3 socket. 15 HMEC 355 headset: ̈ Connect the XLR-5 plug to the XLR-3 socket. HMEC 352 headset: ̈ Connect the ¼" (6.35 mm) stereo jack plug for the headphones and the PJ-068 jack plug ...
Instructions for Use
Page 16
... LR 6) or NiMH rechargeable batteries. Observe correct polarity when inserting the batteries. ̈ Close the cover of the HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsets can be powered via the BP-04 battery pack (see "Recommended accessories" on page 9). Yellow LED: The battery...battery capacity is turned on standard or rechargeable batteries (not included in the delivery). However, to the battery pack (except HMEC 352, HMEC 355 and HMEC 356) The NoiseGard™ electronics of the battery compartment. Replace the batteries. 16 Inserting / replacing the the batteries ...
... LR 6) or NiMH rechargeable batteries. Observe correct polarity when inserting the batteries. ̈ Close the cover of the HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsets can be powered via the BP-04 battery pack (see "Recommended accessories" on page 9). Yellow LED: The battery...battery capacity is turned on standard or rechargeable batteries (not included in the delivery). However, to the battery pack (except HMEC 352, HMEC 355 and HMEC 356) The NoiseGard™ electronics of the battery compartment. Replace the batteries. 16 Inserting / replacing the the batteries ...
Instructions for Use
Page 17
.... 17 Attaching the battery pack to clothing The battery pack can be attached to clothing by setting the ON/OFF switch to ON. HMEC 372 and HMDC 372 headsets: Connect the U-174/U jack plug for the headphones and the microphone to the U-174/U socket of your intercom. ̈ Turn ...on the battery pack by means of operation. Connecting the headset, turning on the battery pack ̈ Connect the XLR-3 plug of the headset connecting cable to the XLR-3 socket on the connecting cable of the battery pack. ̈ HMEC 350 and HMEC 450 headsets: Connect the ¼" (6.35 mm) stereo jack plug for...
.... 17 Attaching the battery pack to clothing The battery pack can be attached to clothing by setting the ON/OFF switch to ON. HMEC 372 and HMDC 372 headsets: Connect the U-174/U jack plug for the headphones and the microphone to the U-174/U socket of your intercom. ̈ Turn ...on the battery pack by means of operation. Connecting the headset, turning on the battery pack ̈ Connect the XLR-3 plug of the headset connecting cable to the XLR-3 socket on the connecting cable of the battery pack. ̈ HMEC 350 and HMEC 450 headsets: Connect the ¼" (6.35 mm) stereo jack plug for...
Instructions for Use
Page 18
... 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 headsets to the on-board power supply via the cigarette lighter socket: • ACX-1 adapter cable for powering one headset via the 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 headsets to the on-board power supply via the cigarette lighter socket: • ACX-1 adapter cable for powering one headset via the cigarette lighter...
Instructions for Use
Page 19
...compensation by setting the ON/OFF switch to "ON" (see "Turning NoiseGard™ on/off" on page 22). ̈ Final adjustment is ensured. Preparing the headsets for use Adjusting the headband For good noise attenuation and best possible comfort, the headband has to be adjusted to properly fit your head: ̈...; Wear the headset so that the headband runs over the top of your head. ̈ Adjust the length of the headband so that • your ears are ...
...compensation by setting the ON/OFF switch to "ON" (see "Turning NoiseGard™ on/off" on page 22). ̈ Final adjustment is ensured. Preparing the headsets for use Adjusting the headband For good noise attenuation and best possible comfort, the headband has to be adjusted to properly fit your head: ̈...; Wear the headset so that the headband runs over the top of your head. ̈ Adjust the length of the headband so that • your ears are ...
Instructions for Use
Page 20
Positioning the microphone towards the corner of the mouth. Bend the microphone boom so that the microphone is placed at the corner of the mouth The HMEC 350, HMEC 352, HMEC 355, HMEC 355-C, HMEC 356, HMEC 372 and HMEC 450 headsets feature a flexible microphone boom. Positioning the microphone Relocating the microphone boom The microphone boom can be worn on either side of approx. 2 cm between microphone and mouth. 20 Maintain a distance of the mouth. ̈ Loosen the quick-fixing device. ̈ Rotate the microphone boom by 180°. ̈ Tighten the quick-fixing device.
Positioning the microphone towards the corner of the mouth. Bend the microphone boom so that the microphone is placed at the corner of the mouth The HMEC 350, HMEC 352, HMEC 355, HMEC 355-C, HMEC 356, HMEC 372 and HMEC 450 headsets feature a flexible microphone boom. Positioning the microphone Relocating the microphone boom The microphone boom can be worn on either side of approx. 2 cm between microphone and mouth. 20 Maintain a distance of the mouth. ̈ Loosen the quick-fixing device. ̈ Rotate the microphone boom by 180°. ̈ Tighten the quick-fixing device.
Instructions for Use
Page 21
To do so, loosen the quick-fixing device and adjust the microphone boom in length. ̈ Pull the middle part of the mouth. For positioning the microphone of the HMDC 372 headset, proceed as follows: ̈ Adjust the length of the microphone boom so that the distance between microphone and mouth is placed at the corner of the microphone boom towards the mouth so that the microphone is approx. 2 cm. ̈ Tilt the microphone for final positioning. 21
To do so, loosen the quick-fixing device and adjust the microphone boom in length. ̈ Pull the middle part of the mouth. For positioning the microphone of the HMDC 372 headset, proceed as follows: ̈ Adjust the length of the microphone boom so that the distance between microphone and mouth is placed at the corner of the microphone boom towards the mouth so that the microphone is approx. 2 cm. ̈ Tilt the microphone for final positioning. 21
Instructions for Use
Page 22
... NoiseGard™ ON/OFF switch to a medium value. Mono/Stereo selection (except HMEC 355, HMEC 355-C, HMEC 372 and HMDC 372) In general, you'll receive a mono sound source so that you can hear critical sounds such as a conventional headset. Using the headsets Turning NoiseGard™ on/off With the NoiseGard™ active noise compensation...
... NoiseGard™ ON/OFF switch to a medium value. Mono/Stereo selection (except HMEC 355, HMEC 355-C, HMEC 372 and HMDC 372) In general, you'll receive a mono sound source so that you can hear critical sounds such as a conventional headset. Using the headsets Turning NoiseGard™ on/off With the NoiseGard™ active noise compensation...
Instructions for Use
Page 25
Replacing the headband padding of the HMEC 450 headset Replace the headband padding if it is damaged. ̈ Open the snaps on the headband padding and remove the worn headband padding. ̈ Put the ...
Replacing the headband padding of the HMEC 450 headset Replace the headband padding if it is damaged. ̈ Open the snaps on the headband padding and remove the worn headband padding. ̈ Put the ...