Analysis of a passive radio frequency excited acoustic transducer

被引：0

作者：

Hu, Lejun ^{[1
]}

Thompson, Charles ^{[1
]}

Remillard, Grace ^{[1
]}

Chandra, Kavitha ^{[1
]}

机构：

[1] Univ Massachusetts, Elect & Comp Engn Dept, Lowell, MA 01854 USA

来源：

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 2021年 / 150卷 / 02期

关键词：

Acoustical analogy - Audio signal - Back-scattered - Battery-free - Physical process - Radio frequencies;

D O I：

10.1121/10.0005848

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

In this work, the physical processes that govern the operation of a passive acoustic transducer are analyzed and modeled. The wireless battery-free transducer derives its power from an externally applied electromagnetic field generated by a radio transmitter. The audio signal is encoded in the backscattered electromagnetic field. Electro-mechano-acoustical analogies are developed and presented. Power generation, sound transduction, and radio frequency backscatter transmission of the audio signal are analyzed. The resonant frequency of the passive acoustic transducer derived from this analysis is comparable to those reported in the literature.

引用

页码：1133 / 1139

页数：7

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