Underwater self-contained sound intensity instrument and sound intensity measurement method

Abstract

The invention discloses an underwater self-contained sound intensity instrument and a sound intensity measurement method. A sound intensity probe is installed at the lower end of a storage bin bottom seat, and the interior of a storage bin is provided with a lower partitioning plate and an upper partitioning plate. A signal conditioning module is disposed on the lower partitioning plate, and a microprocessing and storage module and a power module are disposed on the upper partitioning plate. A data reading interface and a storage battery charging interface are disposed on an upper cover plate of the storage bin, and are sealed through O-shaped rings. An output end of the sound intensity probe is connected with an input end of the signal conditioning module. An output end of the signal conditioning module is connected with the microprocessing and storage module. The power module supplies power to the sound intensity probe, the signal conditioning module and the microprocessing and storage module at the same time. The data reading interface is connected with the microprocessing and storage module, and the storage battery charging interface is connected with the power module. The instrument can enable the instant sound intensity, mean sound intensity and complex sound intensity data to be stored in an instrument without a cable.

Description

technical field [0001] The invention belongs to the field of underwater acoustic measurement and testing, and in particular relates to an underwater self-contained sound intensity meter and a sound intensity measurement method capable of measuring underwater sound intensity within a frequency range of 20 Hz-2000 Hz in a spatial three-dimensional direction. Background technique [0002] Sound intensity is a physical quantity representing the magnitude and direction of sound energy flow in a sound field. In the application field of underwater acoustic engineering, the use of sound intensity can be used to conduct research on subfields such as underwater target detection and recognition, marine environment detection, and underwater sound source structure vibration and sound radiation characteristics. [0003] The research on the sound intensity meter began in the 1930s. HarryOlson of American RCA Company invented the sound power test system used in aeroacoustics in 1931; in 19...

AI Technical Summary

Problems solved by technology

In addition, although the measurement of underwater sound intensity has a very high application value, the traditional method of obtaining this physical quantity is still based on the sound pressure and vibration velocity obtained by the hydrophone, and the instantaneous sound intensity and average sound intensity are obtained by post-processing. strong and polyphonic

So far, there is no underwater sound intensity measuring instrument that directly uses the instantaneous sound intensity, average sound intensity and complex sound intensity as the output. Of course, there is no literature report on the underwater self-contained sound intensity meter.

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