Ocean Sound Meter 2 (OSM 2)
Underwater sound level meter and recorder
The OSM 2 is an over-the-side underwater sound level meter and acoustic recorder specifically designed for environmental noise assessments.
Precisely calibrated to quantify sound from:
Pile driving
Seismic surveys
Low- and mid-frequency sonar
Ambient/background noise
Displays underwater acoustic data and computed levels in real time with audio playback while also recording at full digital quality
Compact and easily deployed from any vessel or fixed platform
Stackable
battery packs
Your choice of
hydrophones and cables
Rugged wheeled
transport case
Ideal for impact assessments
Because it is precisely calibrated, the OSM 2 accurately quantifies sound levels from any type of underwater source or activity. Sound levels are displayed in real time for immediate assessment and decision-making:
Peak sound pressure level (PK in dB re 1 µPa)
Root-mean-square sound pressure level (rms SPL in dB re 1 µPa)
IEC 61672 fast-time weighted sound pressure level
Per-pulse and cumulative sound exposure levels (SEL in dB re 1 µPa²·s)
See and hear sound in real time
Unlike traditional sound level meters, the OSM 2 software displays a large full-colour spectrogram to easily visualize the frequency content of captured sound.
Listen to the sound as you record it or review selected periods. Sound level metrics are displayed in real time. Pristine signal data are recorded to WAV files for later verification, auditing, or further analyses.
Built-in impulse detector
The OSM 2 automatically quantifies peak and rms sound levels of acoustic events, like strikes of a pile driver, for on-the-spot assessment. These levels are saved to a CSV file for automated log-keeping. You can configure the detection parameters to suit the sound source.
Easily deployed from any vessel
Unlike bulky autonomous recorders, the OSM 2 is designed for easy deployment from any vessel or platform. Just connect the deck set to your computer and lower the hydrophone over the side.
The current-loop hydrophone provides high fidelity recordings free of background hiss. Includes a 50 m underwater cable, or longer if desired.
Standard equipment
OSM 2 deckbox in watertight enclosure
Broad bandwidth hydrophone with 50 m cable
25 m Ethernet cable
AC power cable
OSM software and user manual
Rugged transport case with wheels
Optional add-ons
Rechargeable battery packs (24 h runtime each)
Field-rated notebook computer with pre-installed OSM software
Additional hydrophones
Extended hydrophone cable(s)
Internal recording capability (up to 6 TB)
Extended Ethernet cable
Specifications
| Acoustics |
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| Hydrophones |
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| Environmental |
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| Physical and power |
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Due to continued product improvement, these specifications are subject to change without notice.
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