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- W2819364025 abstract "Acoustic horns can enhance the overall efficiency of loudspeakers to emanate highly directional acoustic waves. In this work, a theoretical model is developed to predict difference frequency acoustic fields generated by a parametric array loudspeaker (PAL) with a flared horn. Based on this model, analytical solutions are obtained for exponentially horned PALs. A numerical analysis on the performance of horned PALs subject to various horn parameters (i.e., horn length and flare constant) is implemented. To compare with nonhorned parametric acoustic array (PAA) devices, it is able to generate highly directional acoustic wave beams for a wide range of difference frequencies, in which the generated sound pressure levels at low frequencies can be significantly enhanced. In addition, the equivalent radius of a nonhorned emitter that matches the directivity achieved by a horned one is also quantitatively investigated. The present research will provide useful guidelines for the design and optimization of horned parametric array equipment." @default.
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- W2819364025 date "2018-08-13" @default.
- W2819364025 modified "2023-10-02" @default.
- W2819364025 title "Highly Directional Acoustic Waves Generated by a Horned Parametric Acoustic Array Loudspeaker" @default.
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- W2819364025 doi "https://doi.org/10.1115/1.4040771" @default.
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