cockpit headsets, pilot, aeroplane, aircraft
General Description
Experience excellent noise attenuation over the entire frequency range. The HMEC 350 / BP-04 NoiseGardâ„¢ ensures superior speech intelligibility and voice transmission - even in the loudest of surroundings. This lightweight headset is fitted with a volume control for the headphones, flexible boom microphone, collapsible cushioned headband, mono/stereo switch and the on/off switch for NoiseGardâ„¢ circuitry, with ease of use and optimum comfort in mind.
Features
- Constant attenuation of up to 40 dB throughout the entire audio range
- Superior speech intelligibility
- Electronics fully integrated into headphone capsules
- Can be used as conventional headphones when supply voltage is switched off
- Noise-compensated boom microphone for superior speech transmission
- 5 year warranty
Delivery Includes
- HMEC 350 / BP-04 NoiseGardâ„¢
- 3-pin input socket for aircraft’s internal power supply
- Carrying case for headset and accessories
- MZQ 2002-1 cable clip
- MZW 45 windshield
- BP-04 battery pack and installation socket
cockpit headsets, pilot, aeroplane, aircraft
Technical Data
| Attenuation (active + passive) |
> 25 - 40 dB |
| Connection cable |
Approx 5 ft. (1.5 m) |
| Connector |
6.3 mm stereo-headphones, PJ-068-microphone, XLR-3 NoiseGardâ„¢ power, volume control for headphones |
| Contact pressure |
Approx. 10 N |
| Ear coupling |
Around-the-ear |
| Frequency response (headphones) |
45 - 15,000 Hz |
| Frequency response (microphone) |
300 - 5,000 Hz |
| Max. sound pressure level (active) |
120 dB |
| NoiseGardâ„¢ supply |
12 - 35 VDC approx. 27 mA, max. 80 mA |
| Operating temperature |
-10 °C...+55 °C |
| Operating voltage (stand alone) |
typ. 16 VDC (8-16 VDC, 8-25 mA) |
| Output voltage |
400 mV ± 3 dB / 114 dB/SPL |
| Specials |
NoiseGardâ„¢ on/off & mono/stereo switch |
| Storage temperature |
-55 °C...+55 °C |
| Transducer principle |
Dynamic |
| Transducer principle |
Electret - MKE 45-1 bipolar |
| Weight w/o cable |
13.1 oz. (370 g) |
Connector Image
cockpit headsets, pilot, aeroplane, aircraft
Recommended Accessories
| Part/Accessory |
Article No. |
| ACX-1 |
USACX1-US |
XLR to cigarette lighter adapter for HMEC350/450/460
|
| ACX-11 |
USACX11-US |
Adaptor cable to supply power to an HMEC 460, HMEC 350, HMEC 355-C, HMEC 372, HMDC 372, HMEC 450, HMEC 300, HMEC 305-C, HMEC 322, HMDC 322 or an HMEC 400 via cigarette lighter. The ACX-11 is fitted with a right-angled connector, a 7.5 A flat fuse and an LED Display.
|
| ACX-2 |
USACX2-US |
Dual XLR to cigarette lighter adapter for HMEC350/450/460 series
|
| ACX-22 |
USACX22-US |
Adaptor cable to supply power to two HMEC 460, HMEC 350, HMEC 355-C, HMEC 372, HMDC 372, HMEC 450, HMEC 300, HMEC 305-C, HMEC 322, HMDC 322 or an HMEC 400 via cigarette lighter. The ACX-11 is fitted with a right-angled connector, a 7.5 A flat fuse and an LED Display.
|
| BP 04 |
500357 |
For powering the NoiseGardâ„¢ electronics of the HMEC 350, HMEC 355-C, HMEC 372, HMDC 372, HMEC 450, HMEC 300, HMEC 305-C, HMEC 322, HMDC 322 and HMEC 400 headsets during mobile use. The BP-04 is fitted with an on/off switch and operation and battery indicators. Four AA size batteries ensure more than 15 hours of reliable operation. With auto shut-off function. This function automatically switches the battery pack off after approx. 1-2 minutes to avoid wasting battery power when the headset is taken down or left unused. The feature auto shut-off is applied for a patent.
|
| Ear pads |
077966 |
HMEC 3xx ear pads (pair)
|
| GOP |
092807 |
Gel ear pads for HME 1xx, HMEC 3xx / 4xx series
|
| Headband |
086628 |
Premium comfort headband for HMEC450, HMEC460, HMEC350, HME110 and HME100
|
| HZC 08 |
525787 |
Cable Clip
|
| MZW 45 |
075823 |
Windshield for all aviation headsets with MKE 45-1 microphones.
|
cockpit headsets, pilot, aeroplane, aircraft
Variants
| HMEC 372 / BP-04 |
Article #500562 |
| The HMEC 372 / BP-04 is a variant of the HMEC 350 with coiled cable and U174/U audio and microphone connector for use in most helicopters. BP-04 not included. Complies with FAA/JTSO-C57a & C58a. |
Glossary
| Attenuation (active + passive) |
| Reduction in ambient noise achieved by wearing (closed) headphones (passive attenuation) with NoiseGard active noise compensation (active attenuation). |
| Connection cable |
| When one speaks about headphones, the emphasis is on such things as sound quality and frequency response. There is rarely any mention of the connection cable. Most Sennheiser headphones are fitted with an OFC (oxygen-free copper) cable. This ensures linear and low-loss transmission in the broad frequency spectrum of the headphones. Many Sennheiser headphones also have detachable cables, which make it very easy to replace them. |
| Connector |
| A standardised single or multi-pole plug for connecting units or accessories. |
| Contact pressure |
| The wearing comfort of a set of headphones is determined not only by its weight but also by the force with which the earpieces are pressed onto the ears. This force is given in newtons (N), whereby 1 N corresponds to the compressive force which a mass of about 100 g exerts on a solid surface. The DIN Standard 45500 Part 10 limits the maximum permissible contact force to 5 N. Values of between 1.3 and 4 N are common, although lower values apply for open headphones. Higher values can be found in the case of closed headphones. Here, a higher contact pressure is required in order to achieve sufficient sealing, which is important for the reproduction of low frequencies. |
| Ear coupling |
| A distinction is made between headphones which are worn on the external ear (supra-aural) and those which surround the ear (circumaural). Open headphones have foam ear pads that rest on the ears or ring pads that surround the ears. Closed headphones, on the other hand, nearly always have circumaural ear pads. |
| Frequency response (headphones) |
| The frequency response of a pair of headphones is given within limits defined by the manufacturer. |
| Frequency response (microphone) |
| The frequency response of a microphone is given within the limits defined by the manufacturer. In studio condenser microphones it is generally within the range of between 20 Hz and 20 kHz. |
| Max. sound pressure level (active) |
| The maximum sound pressure a unit can reproduce before a given THD is reached. |
| NoiseGardâ„¢ supply |
| Power supply required for powering the NoiseGard active noise reduction electronics. |
| Operating temperature |
| Gives the range of temperatures at which a unit can be operated without damage. |
| Operating voltage (stand alone) |
| Voltage type and level required for powering a unit. |
| Output voltage |
| The (signal) voltage which a unit supplies at its output. |
| Storage temperature |
| Gives the range of temperatures at which a unit can be stored without damage. |
| Transducer principle |
| Two transducer principles have become established for the conversion of electric energy into mechanical energy: electrodynamic and electrostatic transducers, whereby the latter is only to be found in audiophile systems, due to their relatively high manufacturing costs. Electrodynamic transducers basically consist of a ring-shaped permanent magnet and an oscillation coil, which is fixed to the receiver diaphragm. When an audio-frequency alternating current is passed through the oscillation coil, it is caused to vibrate in accordance with the audio-frequency alternating current, thus causing the diaphragm to vibrate in the same way. |
