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Audio filter OAM-480 for optical acoustic laser microphone
The newest device
Audio filter OAM-480
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Main characteristics
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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.
Reduced listening effort
Enhanced speech intelligibility
Enhances operations from vehicles
No dedicated training required
Key Features and Benefits
Reduced listening effort Enhanced speech intelligibility Enhances operations from vehicles 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 | 03-03-2021 | Documentation (pdf) | 0.09 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 | 03-03-2021 | Documentation (pdf) | 0.09 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
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| Power supply OAM-A-480 |
12 VDC, power consumption <150 VA
100...230 VAC with adapter, power Consumption <150 VA
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| Packaging |
The hardware is installed in easy-to-carry 19’’ rack
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| 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 |
| Models | Audio filter | Recorder raw data | Recorder filtered data | Storage case |
| OAM-A-480 | x | - | - | x |
| OAM-A-480-R | x | x | - | x |
| OAM-A-480-R2 | x | x | x | x |
| 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 | 03-03-2021 | Documentation (pdf) | 0.09 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 | 03-03-2021 | Documentation (pdf) | 0.09 MB | download |
To access this product file, get partner STE status
Demo or training are carried out in our premises or in the client's country, subject to an official invitation from government agencies.
We provide online demos only to existing clients with whom we have successful experience of cooperation. We do not provide free training. If you are not familiar with the subject, links to training courses are here.| 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 | 03-03-2021 | Documentation (pdf) | 0.09 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 | 03-03-2021 | Documentation (pdf) | 0.09 MB | download |
To access this product file, get partner STE status
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