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Special monitoring systems for secret services

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Audio filter OAM-480 for optical acoustic laser microphone

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Audio filter OAM-480
Audio filter OAM-480
  • Audio filter OAM-480
  • Audio filter OAM-480
  • OAM-A-480-Case
Main characteristics
SKU 2176
Vendor Intercept
Category Surveillance - Audio Forensics
Power source 12 VDC, <150 VA, 100...230 VAC with adapter
Delivery set Audio Filter, Power supply, Recorders (optional), Case
Dimensions, HWD 19’’ rack
Weight 15 kg
Shipment Worldwide
Price 38745 $
Others currency 35000 ˆ
In stock
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Audio Enhancement and Recording for Laser Microphones


The OAM-A-480 Audio Filter as a stand-alone accessory designed to reduce listening effort and to enhance speech intelligibility. Specially designed by forensic audio experts, it copes with the dominant noise features of the OAM when operated close to the range limit or under restrictive operational conditions. In addition a range of enhancement algorithms provide good sound quality for long term audio surveillance. Choices of audio recorders allow for a safe watermarked storage.

How it works

By the nature of laser audio surveillance typical noise features are present in the raw signal.
Cracking, tweet and noise modulations can be present when operation at the performance limits. Standard audio filtering devices don’t feature
filters for this kind of noise, because they are
proprietary for the OAM technology.
The specially developed filter algorithms work in sequenced steps. First cracking is removed, which reduces the listening effort dramatically. The Tweet filter cleans the signal from interference noise and feeds the signal into a combined noise modulation and noise cancellation filter. The last stage is a comfort leveler with dynamic compression for best intelligibility. All filters can be bypassed individually.

Key Features and Benefits

red1.jpg Reduced listening effort

red1.jpg Enhanced speech intelligibility

red1.jpg Enhances operations from vehicles

red1.jpg No dedicated training required

Operating concept

The control concept is minimalistic to ensure ease-of-use in time critical mobile operations. Only by trial-and-error the operator gets quickly familiar with the dials and buttons for toggling filter options and controlling the filter effectiveness. The OAM-A-480-R model allows for raw data recording and subsequent post processing

File Title Release Date File Type Size (mb) Action
Audio filter OAM-480 Brief technical description 03-20-2019 Documentation (pdf) 0.89 MB download
End User Certificate (EUC) to apply for purchase 07-16-2019 Documentation (doc) 0.02 MB download

To access this product file, get partner STE status


Scope of Supply

OAM-A-480 Audio Filter
0, 1 or 2 digital audio recorders (depending on model)
Shock protected storage case

Manuals

File Title Release Date File Type Size (mb) Action
Audio filter OAM-480 Brief technical description 03-20-2019 Documentation (pdf) 0.89 MB download
End User Certificate (EUC) to apply for purchase 07-16-2019 Documentation (doc) 0.02 MB download

To access this product file, get partner STE status


Audio Filter General Specifications
Weight
15 kg OAM-A-480 stand alone
25 kg OAM-A-480-R2 incl. rack
Power supply OAM-A-480
12 VDC, power consumption <150 VA
100...230 VAC with adapter, power Consumption <150 VA
Packaging
The hardware is installed in easy-to-carry 19’’ rack


Audio Filter I/O
Audio Input                              S/P-DIF optical (raw signal)
Audio Output                             Line Out Left / Right; RCA (Cinch, filtered signal)
Phones connector                             6.3 mm TSR with volume dial; optimized for 35-80 OHM

Audio Filters
Sensitivity setting OAM controller      Medium (for proper operation of the Tweet filter)
Burst Filter / Tweet Filter      Adaptive filter with bypass
Noise-Filter      Tunable filter coupled with demodulator (with bypass)
Equalizer      Adaptive tunable filter with bypass
Comfort Level      Adaptive filter for dynamic compression with limiter (with bypass)
Low Pass      Tunable filter to adapt the target response (with bypass)
Global Bypass      Bypass for all filters (raw signal at output)
Volume      Control of the head phone output volume

Recording (option)
General data                      19” digital recorder with watermarked recording; playback and
                      listening to the current recording. Loop-thru of input to digital and
                      analog out.
Recorder raw data                      Input S/P-DIF electrical from OAM Controller, Recording in WAV 
                      format on USB stick or SD memory card.
Recorder filtered data                      Input analog audio signal from audio filter line out; recording


ModelsAudio filter Recorder raw data Recorder filtered data Storage case
OAM-A-480x--x
OAM-A-480-Rxx-x
OAM-A-480-R2xxxx

File Title Release Date File Type Size (mb) Action
Audio filter OAM-480 Brief technical description 03-20-2019 Documentation (pdf) 0.89 MB download
End User Certificate (EUC) to apply for purchase 07-16-2019 Documentation (doc) 0.02 MB download

To access this product file, get partner STE status


File Title Release Date File Type Size (mb) Action
Audio filter OAM-480 Brief technical description 03-20-2019 Documentation (pdf) 0.89 MB download
End User Certificate (EUC) to apply for purchase 07-16-2019 Documentation (doc) 0.02 MB download

To access this product file, get partner STE status

File Title Release Date File Type Size (mb) Action
Audio filter OAM-480 Brief technical description 03-20-2019 Documentation (pdf) 0.89 MB download
End User Certificate (EUC) to apply for purchase 07-16-2019 Documentation (doc) 0.02 MB download

To access this product file, get partner STE status

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