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Ocean Sound Meter - Under Water Sound Level Meter & Recorder

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Ocean Sound Meter - Under Water Sound Level Meter & Recorder Jasco, USA

Calibrated Sound Level Measurement in Real Time An over-the-side underwater sound level meter and acoustic recorder specifically designed for environmental noise assessments. Sound levels are displayed in real time for immediate assessment: Peak sound pressure level (peak SPL in dB re 1 µPa) Root-mean-square sound pressure level (rms SPL in in dB re 1 µPa) IEC 61672 fast-time weighted sound pressure level Cumulative sound exposure level (SEL in dB re 1 µPa􀄁s) The Ideal Solution for Underwater Sound Measurements Because it is precisely calibrated, the Ocean Sound Meter accurately quantifies sound levels from all types of underwater source or activity: Pile driving Seismic surveys Low- and mid-frequency sonar Ambient/background noise See and Hear Underwater Sound in Real Time Unlike traditional sound level meters, the Ocean Sound Meter software displays a large full-color spectrogram of the acoustic signal so you can visualize the frequency content of underwater sound. You can listen to the sound as you record it, or review selected periods. The sound level metrics are displayed in real time and the data are recorded to WAV files on your computer to easily manage noise exposure data. Built-in Impulse Detector The built-in Impulse Detector instantly quantifies peak and rms sound levels of each transient acoustic event, such as a strike of a pile driver, for on-the-spot assessment. The sound level readings for each impulse event are saved to a CSV file on your computer for automated log-keeping. Compact and Easily Deployed from any Vessel This system is designed for easy deployment from any vessel or platform. Simply connect the watertight enclosure to your computer via Ethernet cable and deploy the hydrophone over the side. The current-loop hydrophone provides high fidelity recordings free of background hiss. Audio Playback Listen to your data in real time or select a window of interest for review. Real-time Spectrograms Displays the spectrogram in real-time so you can visualize your data as you measure them. Impulse Detection Detects impulses to instantly quantify peak sound levels of acoustic events. Connects to any Computer The interface module easily connects to any computer via Ethernet. Choice of Hydrophones Your choice of high- or low-sensitivity hydrophone. Or choose the dual channel model for measurements both near and far.

Ocean Sound Meter - Under Water Sound Level Meter & Recorder

TECHNICAL SPECIFICATION What’s in the Box Interface module in a watertight (non-submersible) enclosure Hydrophone and cable Ethernet and USB power cables Ocean Sound Meter software application (installation CD) Environmental Watertight (non-submersible) enclosure rated to IP67, NEMA 1, 2, 4, 4X, and UL-508 Operating temperature: −5 to 50 °C Storage temperature: −30 to 55 °C Physical Enclosure: 28.0 cm L ∓20.0 cm W ∓7.1 cm H Cable length: 30 m (or longer upon request) Power: USB (5.0 VDC, 500 mA) from your computer or a USB power adapter Software Displays sound pressure levels and sound exposure levels (peak SPL, rms SPL, and cumulative SEL) for the entire recording or for user selected portions of data Detects impulses in real time and displays the sound levels Configurable detection parameters to suit the sound source Signal Acquisition Performance Sample rates: 2–128 ksps Spectral noise floor: Better than −150 dB re FS at 128 ksps Data storage format: WAV (uncompressed) Single or dual-channel operation Your choice of high- or low-sensitivity hydrophone, or both. High Sensitivity Hydrophone Option Manufacturer: GeoSpectrum Technologies Inc. Model: M8EC (omnidirectional, current-loop) Nominal sensitivity: −164 dBV re 1 μPa @ 1 kHz Frequency response: 17 Hz to 150 kHz Low Sensitivity Hydrophone Option Manufacturer: GeoSpectrum Technologies Inc. Model: M8EC-0dB (omnidirectional, currentloop) Nominal sensitivity: −200 dBV re 1 μPa @ 1 kHz Frequency response: 17 Hz to 150 kHz Other hydrophone specifications are available as special order.