Product Features
Sennheiser offers two series of headsets designed specifically for use in cockpits of commercial aircraft. The noise cancelling 26 Series is designed for noisy cockpit environments, while the lightweight 46 Series is suited for aircraft lower ambient noise levels, such as modern jets. Both series of headphones come with the same type of exchangeable boom microphone and cable components - a great benefit for all air fleet customers.
- Noise reduction of approx. 15 dB – consequently the radio volume can be decreased
- Extremely lightweight
- Superb comfort due to the patented two-piece automatic headband and soft ear pads
- “Flip-away” headphone allows single-sided listening
- Flexible microphone boom, can be worn on either left or right-hand side
- Noise-compensating condenser microphone ensures excellent speech transmission
- Volume peaks in the headphones above 110 dB are eliminated
- Single-sided cable, easy to replace
- Adjustable Volume Control
- ETSO/TSO approval C57a/C58a
- TSO approval C139
- 5 year warranty
- NOISEGARD™ - HOW IT WORKS
Delivery Includes
- HMEC 46 headset
- Carrying bag for headset
- MZW 46 wind and pop screen
- Cable clip
- User manual
- EASA Form 1
Manuals
Instruction Manual, Cell Phone Compatability, Correct Use of Headset
Technical Data
| Transducer principle (Headphones) | dynamic |
| Ear coupling | supra-aural, open |
| Frequency response (headphones) | 12 - 14.000 Hz |
| Nominal impedance (active/passive) | 600 Ohm mono/1200 Ohm stereo |
| Characteristic SPL | 93 dB SPL (1 kHz, 1 mW) / 95 dB SPL (1 kHz, 1 V) |
| Noise compensation (active) | > 15 dB (300 - 700 Hz) |
| THD, total harmonic distortion | < 1% at 1kHz, 90dB SPL |
| Contact pressure | approx. 3 N |
| Transducer principle (Microphone) | BKE 46 pre-polarized condenser microphone (electret), noise-compensating, integrated pop noise reduction |
| Frequency response (microphone) | 350 - 6.000 Hz |
| Output voltage | 17-100 mV/Pa adjustable, 800 mV -2dB at 114 dB SPL / 80 mV/Pa -2dB (factory preset) |
| Operating voltage (stand alone) | 8 - 16 V DC |
| Connection cable | single-sided round cable, length 1.8 m |
| Weight w/o cable | approx. 150 g |
| Operating temperature | -15°C... +55°C |
| Storage temperature | -55°C... +70°C |
COMPARE TO TELEX AIRMAN 850
| FEATURE | Sennheiser HMEC 46-1 |
Telex Airman 850 |
| Wearer Comfort | ||
| Weight | 150 grams without cable | 112 grams without cable |
| Clamping Pressure | 3 N with broad, soft ear pads | 1.2 to 1.6 N (insufficient to
stabilize headset – particularly in turbulent conditions) |
| Ergonomic Factors | Split headband for better center of gravity | Single (un-split) headband |
| Headphone THD* | <1% | Up to 9% |
| ANR Performance | Up to 22 dB with broad frequency range | Up to 12 dB with narrow frequency range |
| Peak-Level Protection | Eliminates incoming volume spikes >110 dB to protect user’s hearing | Not available |
| Volume Control | Fully adjustable volume control available |
Hi-Lo setting only (9 dB) |
| Microphone | Noise compensating microphone, integrated POP noise protection | Noise compensating microphone, integrated POP noise protection |
| Microphone sensitivity adjustment |
Yes, potentiometer on boom side ear piece | No, factory set |
| Warranty | 5 years parts and labor | 3 years |
| Serviceability | Modular design enables boom and cable to be exchanged in the field; international service centers available | Service center in Lincoln, NE |
| Power | 120 hours on 2 AA batteries; auto battery shut-off when headset unplugged extends battery life | Power from microphone bias voltage; ANR performance may be affected by low bias voltage |
*THD = Total Harmonic Distortion: Lesser THD allows the components in a loudspeaker, amplifier or microphone or other equipment to produce a more accurate reproduction by reducing harmonics added by electronics and audio media. A THD rating < 1% is considered to be in high-fidelity and inaudible to the human ear.