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Hydroacoustic standing-wave sound field forming apparatus

A standing wave and sound field technology, applied in the field of sound field forming devices, can solve the problems of inability to realize, large quality, large geometric size, etc., and achieve the effect of small sound load and small electric power loss

Inactive Publication Date: 2011-11-16
HARBIN ENG UNIV
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Problems solved by technology

[0004] In addition, for the design of low-frequency standing wave sound field below 100Hz, according to the principle of standing wave sound field formation, the design geometric size and quality of the sound tube will be large (about several tons), so the sound tube is placed on the low-frequency vibration table The way engineering can no longer be realized

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  • Hydroacoustic standing-wave sound field forming apparatus
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  • Hydroacoustic standing-wave sound field forming apparatus

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Embodiment Construction

[0013] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0014] The underwater acoustic standing wave sound field forming device of the present invention consists of an upper acoustic tube 1 with an overflow hole 1a and an annular groove 1b, and an excitation signal input port 2a with a vibration exciter, an annular protrusion 2b and a pressure balance port 2c and The lower part of the base 2d consists of the acoustic tube 2, the sound emitter low-frequency bending vibration radiation sheet 3, a vibration exciter, a pressure balance device and a shock absorber. Wherein the vibration exciter includes a vibrating table 4a, a support frame 4b, a moving coil 4c, a supporting spring 4d, a permanent magnet 4e, and a housing 4f, and the pressure balance device includes an air pump 5a, a one-way valve 5b, a regulating valve 5c, an air pressure gauge 5d and an exhaust valve. Gas valve 5e. , The damping device is made up of 4 ho...

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Abstract

The invention provides a hydroacoustic standing-wave sound field forming apparatus, comprising an upper acoustic tube section, a lower acoustic tube section, a sound transmitter low-frequency bending vibration and radiation sheet, a vibration exciter, a pressure equalizer and a shock-absorbing device. The forming apparatus is characterized in that: 1. a standing-wave sound field with adequate measuring signal-to-noise ratio can be formed within 10-100Hz frequency range; 2. vibration of the sound transmitter only has a little effect on fluctuation of an internal sound field; and 3. the sound-transmitting exciter has low electric power loss without need of bearing great quality of an acoustic tube, and has small acoustic load.

Description

technical field [0001] The invention relates to an acoustic device, in particular to a sound field forming device. Background technique [0002] The plane standing wave sound field is a commonly used measurement space next to the plane traveling wave sound field in the field of underwater acoustic measurement. The mathematical relationship between the parameters of the sound field is simple and clear, and it is an ideal space for completing certain underwater acoustic measurement tasks. [0003] The establishment of the planar standing wave sound field is generally realized by rigid sound tubes, which can be summed up in two forms: one is vertically open; the other is horizontally closed. The relevant standing wave sound tube has the sound tube adopted in the vibration liquid column method calibration device of Hangzhou Institute of Applied Acoustics (referring to page 135 of the book "Acoustic Metrology", Atomic Energy Press, June 2002), "Vector Hydrophone Calibrator" (Aco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10K11/18G10K11/22
Inventor 陈洪娟张虎王文芝赵鹏涛
Owner HARBIN ENG UNIV
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