参数阵列扬声器超声换能器的个体差异

2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) Pub Date : 2018-09-10 DOI:10.1109/ICASSP.2018.8462189

Shota Minami, Jun Kuroda, Yasuhiro Oikawa

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引用次数: 2

摘要

参数阵列扬声器(PAL)通常由许多超声波换能器组成，由可听声调制的超声波驱动。由于每个超声波换能器都有不同的谐振频率，因此在制造过程中，一个PAL的超声波换能器存在个体差异。在本文中，每组换能器的共振频率有大的和小的变化，组成两个pal。谐振频率方差大的PAL质量因子小于方差小的PAL质量因子，谐振频率方差大的PAL解调的可听声压级(SPL)大且几乎平坦到3 kHz。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Individual Difference of Ultrasonic Transducers for Parametric Array Loudspeaker

A parametric array loudspeaker (PAL) consists of a lot of ultrasonic transducers in most cases and is driven by an ultrasonic which is modulated by audible sound. Because each ultrasonic transducer has each difference resonant frequency, there is the individual difference in ultrasonic transducers of a PAL in a manufacturing process. In this paper, two PALs are made of each set of transducers with large and small variance of resonant frequencies. Quality factor of PAL with the large variance of resonant frequencies is smaller than that of PAL with small variance, and the demodulated audible sound pressure level (SPL) is large and almost flat to 3 kHz in PAL with the large variance of resonant frequencies.

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2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

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