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Voice Conditioning Unit

Technical Information

Catalogue No: C0341
Category: Unknown
Object Type: Signal/Data Processor
Object Name: Voice Conditioning Unit
Part No: AA1501-4XB
Serial No: 793077
Manufacturer: GEC Avionics
Division: Unknown
Year of Manufacture: Unknown
Width (mm):
Height (mm):
Depth (mm):
Weight (g):
Location: Rack RAA01 [Main Store]

GEC Avionics Limited
Basildon England
Voice Conditioning Unit
Type AA1501-4XB
Wt. 0.5Kg.
Compass Safe Distance cm.
Inst. No. 793077
Made in England
Mod Record 0...9


This unit is part of the GEC Avionics AD150 Voice Enhancement System. Military personnel when deployed in environments characterized by high-level noise require personal hearing protection devices and a system to enhance their voice such that messages and commands are clearly understood. A typical speech enhancement unit has four main components: a microphone array to collect the ambient audio signal, a signal processing system to filter the signal and enhance speech, an Active Noise Reduction (ANR) component, and a hearing-protective earpiece to deliver the processed signal to the wearer. The microphone array may have directional microphones located in pairs near the ears, each pair consisting of one forward facing and one rear-facing microphone. The speech enhancement and ANR components work co-operatively: as the SNR increases past the point where the speech enhancement unit performs effectively, it is gradually replaced by the ANR system. The hearing protective earpiece will be interfaced also with the soldier’s radio communication unit.
This unit has a couple of cables with jacks allowing it to be inserted into a headset cable, presumably for a trial installation.
The declared size and weight is for the box without cables; cable length is 2.1m and weight with cables is 520g.

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