RA4000
Racal Acoustics has engineered its RA4000 digital headset to address current operator requirements with state-of-the-art solutions in electronics, materials, and ergonomics in a product category that has typically relied on older technologies.
The RA4000 headset offers unprecedented performance in hearing protection, sound quality, reliability, and versatility, for outstanding overall value. As a complete solution, it offers modular, customisable, and upgradeable features and accessories to match specific mission requirements and extend useful life.
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High-noise attenuation
The exceptional passive and active noise reduction features protect the hearing of users exposed to high levels of continuous noise.
Autonomous, battery-powered ANR
Advanced digital active noise reduction (ANR) technology improves attenuation performance at low frequencies, providing better protection. Users enjoy this protection even when untethered from a communication system.
Local sound awareness and talk-through
The electronic compression circuitry presents local environment sounds to the wearer at safe levels, so they are more aware of hazards and risks and can have face-to-face conversations without defeating the hearing protection. The output is electronically compressed so its level does not exceed a 85 dB(A) safety level. This capability remains effective during untethered use.
Adjustable neckband
A fully adjustable neckband ensures consistent attenuation and comfort for extended durations.
Noise-cancelling boom microphone
The removable noise-cancelling boom microphone makes clear radio communication possible in high-noise environments, and a respirator microphone can be attached.
Removable cables
The interface cable can be detached from the headset earshell, allowing full hearing protection while untethered. Alternative cables can be attached to connect with other audio equipment.
Press-to-talk switch
For convenience, the press-to-talk switch is ergonomically positioned on the headset.
Mechanical robustness
The RA4000 headset’s robust mechanical design and construction survive rough handling in harsh environments.
IP68 waterproofing
Continuous outdoor use and exposure to wind and rain, snow, and ice are not a problem. The headset also withstands immersion in water.
Headset wearing options
You can wear the RA4000 headset with a neckband or headband, or in a soft helmet liner for bump protection. The liner supports easy attachment of protective shells.
| Interface Cable Weight on Head | 650 g |
|---|---|
| Napeband force (adjustable) | 12.2/14.5 N |
| Communication Modes | Binaural, monaural, programmable |
| Frequency Response | 100 Hz to 10 Hz |
| Input Impedance | 500 Ω |
| Input Range | Programmable 0-5 V |
| Comms Sensitivity | Programmable up to 114 dB SPL |
| Removable Boom Microphone | 150 Ω dynamic noise cancelling, anti-magnetic, immersible |
| Microphone Sensitivity | Sensitivity – 90 dB |
| Microphone Output Range | Programmable 0-15 V |
| Active Noise Reduction ANR | Advanced digital ANR, battery or external powered |
| Binaural Talk-Through | Digital compression to 85 dBA, battery or external powered |
| PTT Switch | 3 positions, located on left earshell |
| Talk-Through Volume Control | Off/on, adjustable – 6/0/+6/+12 dB |
| Comms Volume Control | Adjustable – 6/0/+6/+12 dB |
| External Power | 4.5 to 36 VDC, 1 W (3.5 W peak) |
| Internal Power | 1 x AA 1.5 cell, operation when untethered |
| Interface Cable | Detachable, configured and terminated to suit equipment requirements |
| Compatibility | Radios, intercoms, smart phones |