Noise cancellation technology designed specifically for helicopter & aircraft pilots and other aircrew - ALPHA active noise reduction (ANR) is in use throughout the world protecting military, civil and commercial aircrews from the damaging effects of aircraft noise. Our Active Noise Reduction system offers all of the benefits of high performance noise reduction technology, with improved speech intelligibility and superb wearer comfort, and is a proven method for combating the unwanted, and often dangerous levels of noise experienced in modern civil and commercial helicopters and other aircraft.

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Product Information

Product Details
Brand: Headset Services Ltd
Codes: HSMP3928 [ANR Kit Coiled Cable] HSMP3900 [ANR Kit Straight Cable]
Warranty: 1 Year (Headset Services Limited is the authorised Warranty Repair Centre)
Includes: 2 x Active Noise Reduction Modules, 1 Metre Cable with 8 Pin Lemo Connector, Filters, Foams and Gel Ear Seals
Extras: Volume Control
Features

The Alpha helmet is ideally suited for our Active Noise Reduction (ANR) system. The ANR modules replace the standard earphones and a new downlead is installed. The original passive performance of the helmet as well as the fit of the helmet are unaffected by the installation of the ANR system. If the ANR system is turned off or the power to the system is interrupted, for example by batteries running down then the system will revert to a communication only failsafe and passive protection level of the standard helmet. The system is available with coiled or straight cable and a quality 8 Pin Lemo connector, and can be connected to a battery box or powered directly from the aircraft.

The system is available to suit most aircraft intercoms with (USA Low impedance) 19 ohm, UK NATO) 150ohm or (Civil Spec and police ASU) 600 ohm speakers. Our system is fitted to all UK Police Air Support Helicopters, and is also available with the standard Bose 6 pin plug so you can plug directly into a helicopter fitted with the BOSE installed kit. We recommend that Gel Ear Pads are fitted during the install as they give a better seal around the ear and enhance the performance of the ANR.

Rechargeable Battery Box

Headset Services Limited has developed a lightweight Battery Box with a difference. The sleek design connects to the Lemo connector and provides an approx. 50 hours of operational use. There is a green LED light which shows when the battery box is supplying power to the ANR system within the Alpha helmet. The ON/OFF switch has a lockable feature, whilst the volume control is positioned at the top and allows the user to easily increase and decrease the sound through the Alpha helmet earcups. There is the choice of a coiled cable with UK NATO Plug or U174 (US NATO) Plug, or a straight cable (1 metre) with Twin Plugs for connecting the battery box to the aircraft panel.

The body of the fire retardant battery box has environmental NiMh battery packs and is fitted with a convenient belt clip which allows the user to attach the box to just about any pocket, belt or waistband for easy carry and added security against dropping. The battery box can be charged through the Lemo connector with one of our specially designed mains charger. The recharging time would be approx. 10 hours from fully discharged.

Dimensions: Width 60mm | Length 85mm (including switches 110mm) | Depth 40mm (including belt clip 60mm)





HSL ANR Kit for an Alpha Helmet


Code: HSMP3928

The HSL Active Noise Reduction (ANR) kit is suitable for installation into the Alpha 200, 400 (Multi-Fit) and Eagle (900) helmets. The ANR modules replace the standard earphones and a new loom (downlead) is installed as well. The original passive performance of the helmet as well as the fit of the helmet are unaffected by the installation of the ANR system.

The HSL ANR Kit offers approximately 12dB of extra attenuation whilst retaining the passive attenuation and fit of the original helmet. The system is available with coiled or straight downlead which is terminated with either a Bose-style 6 Pin Lemo, or a 7 or 8 Pin Lemo Plug, and can be powered by the HSL Rechargeable Battery Box or directly from the aircraft's panel. If the ANR system is turned off or the power to the system is interrupted for example by batteries running down then the system will revert to a comms only failsafe and passive protection level of the standard helmet. It is recommend that Gel Ear Seals are fitted during the install as they provide a better seal around the ear and enhance the performance of the ANR.

ANR Kit includes:

  • 2 x ANR Modules
  • Coiled Downlead with 8 Pin Lemo Plug
  • Mic Cable
  • Gel Ear Seals





HSL Rechargeable Battery Box (UK NATO Plug)


Code: HSMP3904-LV1

The HSL Rechargeable Battery Box has a sleek design and connects to the Lemo connector providing an approx. 50 hours of operational use. There is a green LED light which shows when the battery box is supplying power to the ANR system within the Alpha helmet. The ON/OFF switch has a lockable feature, whilst the volume control is positioned at the top and allows the user to easily increase and decrease the sound through the Alpha helmet earcups.

The body of the fire retardant battery box has environmental NiMh battery packs and is fitted with a convenient belt clip which allows the user to attach the box to just about any pocket, belt or waistband for easy carry and added security against dropping. The battery box can be charged through the Lemo connector with one of our specially designed mains charger. The recharging time would be approx. 10 hours from fully discharged.

  • ON/OFF Switch
  • Volume Control
  • LED Power Light
  • 8 Pin Lemo Charger Socket
  • 1 Metre Coiled Cable with UK NATO Plug
  • Belt Clip




HSL Rechargeable Battery Box (U174 Plug)


Code: HSMP3907-LV1

The HSL Rechargeable Battery Box has a sleek design and connects to the Lemo connector providing an approx. 50 hours of operational use. There is a green LED light which shows when the battery box is supplying power to the ANR system within the Alpha helmet. The ON/OFF switch has a lockable feature, whilst the volume control is positioned at the top and allows the user to easily increase and decrease the sound through the Alpha helmet earcups.

The body of the fire retardant battery box has environmental NiMh battery packs and is fitted with a convenient belt clip which allows the user to attach the box to just about any pocket, belt or waistband for easy carry and added security against dropping. The battery box can be charged through the Lemo connector with one of our specially designed mains charger. The recharging time would be approx. 10 hours from fully discharged.

  • ON/OFF Switch
  • Volume Control
  • LED Power Light
  • 8 Pin Lemo Charger Socket
  • 1 Metre Coiled Cable with U174 Plug
  • Belt Clip




HSL Battery Box (Twin Plugs)


Code: HSMP3908-LV1

The HSL Rechargeable Battery Box has a sleek design and connects to the Lemo connector providing an approx. 50 hours of operational use. There is a green LED light which shows when the battery box is supplying power to the ANR system within the Alpha helmet. The ON/OFF switch has a lockable feature, whilst the volume control is positioned at the top and allows the user to easily increase and decrease the sound through the Alpha helmet earcups.

The body of the fire retardant battery box has environmental NiMh battery packs and is fitted with a convenient belt clip which allows the user to attach the box to just about any pocket, belt or waistband for easy carry and added security against dropping. The battery box can be charged through the Lemo connector with one of our specially designed mains charger. The recharging time would be approx. 10 hours from fully discharged.

  • ON/OFF Switch
  • Volume Control
  • LED Power Light
  • 8 Pin Lemo Charger Socket
  • 1 Metre Straight Cable with Twin Plugs
  • Belt Clip




Mains Charger for HSL Rechargeable Battery Box


Code: HSMP3907L-CHG1

Make sure that your HSL Battery Box is always fully charged with this high quality Mains Charger. Sleek, portable and designed especially for the HSL Battery Box with a UK 3 pin plug and long built in lead, simply plug the 8 pin Lemo connector in and your Battery Box is charging.

  • Lightweight and durable
  • Maintains a constant supply voltage during use
  • Intelligent circuitry to prevent overcharging
  • 1.2m straight cable with 8 Way Lemo connector
  • UK Spec 3 Pin Charger


  • Code: HSMP3928
    HSL ANR Kit

  • Code: HSMP3904-LV1
    HSL Battery Box (UK NATO Plug)

  • Code: HSMP3907-LV1
    HSL Battery Box (U174 Plug)

  • Code: HSMP3908-LV1
    HSL Battery Box (Twin Plug)

  • Code: HSMP3907L-CHG1
    Mains Charger for HSL Battery Box


HEADSET SERVICES LTD
Unit 8, 73 Marlborough Road
Lancing Business Park
Lancing, West Sussex
BN15 8AD. UK

T: +44 (0)1273 234 181
F: +44 (0)1903 750 123
E: sales@headsetservices.com
THE MEL GROUP
MEL Aviation Ltd acts
as the group's headquarters.

Laurence Walter House
Addison Road, Sudbury
Suffolk, CO10 2YW. UK

T: +44(0)1787 373282
W: www.themelgroup.co.uk
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