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- W2783240605 abstract "The parametric array can emit two parallel acoustic waves of different frequencies, and can produce high directivity sound waves due to the non-linear effect in the medium (especially in water). The maximum sampling frequency of the system DAC is 750k, that is, the minimum delay of the system is 1333ns. The minimum deflection angle of the acoustic wave emitted by the parameter array is about 5 ° and can only be transmitted to several fixed angles. In order to realize the deflection of any angle of the transmitted acoustic wave, a fractional delay method is introduced, and the minimum delay is fractionated to obtain a smaller system minimum delay, and the design of a suitable filter to approximate the characteristics of the ideal fractional delay filter to achieve the minimum deflection angle of less than 1 ° expected target. In this paper, through the Farrow structure to achieve fractional delay filter, the advantage is only need to change the delay parameter d, you can get the required delay, do not need to recalculate the filter coefficients." @default.
- W2783240605 created "2018-01-26" @default.
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- W2783240605 date "2017-11-01" @default.
- W2783240605 modified "2023-10-14" @default.
- W2783240605 title "The design of phased parametric array based on fractional delay" @default.
- W2783240605 cites W1970387191 @default.
- W2783240605 doi "https://doi.org/10.1109/icsai.2017.8248343" @default.
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