Self-contained Hydrophone Underwater Noise Meter for Marine Mammal Sonar

Self-contained Hydrophone Underwater Noise Meter for Marine Mammal Sonar

It is an instrument that can independently collect and store acoustic information. It is composed of an underwater acoustic sensor, a conditioning circuit, an amplification circuit, a storage circuit, etc., and is generally equipped with software. It has technical features such as wide working frequency bandwidth, large working depth range, flexible working mode, long continuous working time, and large dynamic range. It is small in size and suitable for flexible formation. Can work in unattended marine environment for a long time. Its convenient and efficient features can meet a variety of use needs, and it has now become an important tool in scientific research fields such as marine environmental noise research, ocean acoustic layer analysis, geoacoustic parameter inversion, and underwater acoustic channel characteristics research.

Specification:

1. The main indicators of SCH2025 include:

(1) Pressure resistance 2000 meters

(2) Collecting ocean background noise

(3) Working time 2 months, continuous collection

(4) Automatic collection

(5) Sampling rate 32k

(6) Frequency 20Hz-10kHz

(7) Sensitivity > -197dB

2. Acceptance method and results:

(1) Pressure resistance 2000 meters

Attached with water pressure test report

(2) Collecting ocean background noise

(1) Test method

1. Short-circuit the SCH2025 input, set the SCH2025 parameters and the collection task time, and wait for SCH2025 to enter the continuous collection mode;

2. In an electromagnetic shielding environment, when the data collection lasts for more than 120 seconds, stop collecting, remove the card, and read and analyze the collected data.

(2) Evaluation criteria

The collected ocean background noise is equivalent to the correct collection circuit background noise to be qualified.

(3) Test results

Circuit noise test environment: