A tunable water-air interface acoustic wave communication structure
An air and interface technology, applied in the field of underwater acoustics and audio acoustics, can solve problems such as difficult to use, small frequency of sound waves, difficulties, etc.
Active Publication Date: 2022-05-20
SOUTHEAST UNIV
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Problems solved by technology
[0002] For the water-air interface where the acoustic impedance does not match, the traditional impedance matching method can be used for impedance matching. However, in many practical applications, it is very difficult to find a suitable matching layer material; A fixed frequency is effective, which is difficult to use in water-air acoustic information transmission that requires multi-frequency point sound transmission
[0003] The main problem is: in order to reduce the energy attenuation of the sound wave in the process of propagation and ensure that the sound wave has a certain amount of energy, the transmission of the sound wave requires a smaller frequency
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[0027] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.
[0028] figure 1 As shown, the present invention includes the following characteristic components: 1 is the main acoustic waveguide, 2 is the connecting throat pipe, 3 is the coupling branch pipe, and 4 is the spring slider.
[0029] A tunable water-air interface acoustic wave communication structure of the present invention includes at least one structural unit,
[0030] The aforementioned structural unit includes a main acoustic waveguide and a coupling branch pipe opened in the matrix material;
[0031] It also includes two spring sliders, which are relatively arranged between the main acoustic waveguide and the coupling side branch along the radial direct...
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The invention relates to a tunable water-air interface acoustic wave communication structure, comprising at least one structural unit, the aforementioned structural unit includes an acoustic main waveguide and a coupling side branch pipe opened in a base material; and also includes two spring sliders, both of which are It is relatively arranged between the acoustic main waveguide and the coupling bypass pipe along the radial direction of the cross section of the coupling side branch, and the gap between the two oppositely arranged spring sliders forms a connecting throat connecting the acoustic main waveguide and the coupling side branch pipe; the present invention The width of the connecting throat is adjusted by adjusting the distance between the two spring sliders, and the connecting throat divides the coupling branch into two symmetrical parts along the radial direction of its cross-section; its resonance state is adjusted by changing the structure of the coupling waveguide , so as to realize the transmission of multi-frequency sound waves between water-air, and achieve the purpose of acoustic information transmission between sea-air.
Description
technical field [0001] The invention relates to a tunable water-air interface acoustic wave communication structure, which belongs to the fields of hydroacoustics and audio acoustics. Background technique [0002] For the water-air interface where the acoustic impedance does not match, the traditional impedance matching method can be used for impedance matching. However, in many practical applications, it is very difficult to find a suitable matching layer material; A certain fixed frequency is effective, which is difficult to use in water-air acoustic information transmission that requires multi-frequency point sound transmission. [0003] The main problem is: in order to reduce the energy attenuation of the sound wave in the process of propagation and ensure that the sound wave has a certain amount of energy, the sound wave transmission requires a relatively small frequency. Therefore, in order to achieve tunable acoustic transmission in the low frequency band, it is nece...
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IPC IPC(8): G10K11/18G10K11/36H04B13/02
Inventor 陆增天张辉沈浪毛飞龙殷国栋倪中华
Owner SOUTHEAST UNIV