Acoustic radiation characteristics of a tile projector with performance variations among unit transducers

Wonjong  Chun; Eunghwy Noh; Won-Suk  Ohm; Youngsoo  Seo

doi:10.7776/ASK.2016.35.6.436

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Acoustic radiation characteristics of a tile projector with performance variations among unit transducers 단위 트랜스듀서 간 성능편차를 갖는 타일형 프로젝터의 음향방사 특성

30 November 2016. pp. 436-444

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Abstract

Uniformity in transducer performance is a must-have to ensure the reliable acoustic performance of a tile projector, used for active echo reduction. However, practical limitations imposed by variations in material properties and fabrication errors lead to performance variations among unit transducers, which could degrade the radiation characteristics (transmitting voltage response and directivity) of the tile projector and ultimately the echo reduction performance. In this paper we present a method to minimize these adverse effects via an appropriate placement of unit transducers within the tile projector. To this end, we perform a series of coupled acoustic-piezoelectric simulations, assuming a group of 36 unit transducers having 6 dB variations in transmitting voltage response, to analyze and compare the radiation characteristics of tile projectors under different transducer placement schemes.

Keywords

Tile projector

Performance variations among unit transducers

Radiation characteristics

Placement schemes

능동 반향음 제어용 타일형 프로젝터의 안정적 음향 성능을 보장하기 위해서는 단위 트랜스듀서 간 성능의 균일성이 요구된다. 그러나 재료 물성 편차 및 공정상 오차 등 현실적인 제약으로 인해 단위 트랜스듀서 간 성능편차가 발생하게 되며, 이는 타일형 프로젝터의 방사 특성(송신전압감도 및 지향성)은 물론 반향음 제어 성능에도 부정적 영향을 미칠 수 있다. 본 논문에서는 타일형 프로젝터 제작 시 단위 트랜스듀서의 적절한 배치를 통하여 트랜스듀서 간 성능편차에 의한 영향을 최소화할 수 있는 방안을 제시한다. 이를 위하여 6 dB의 송신전압감도 편차를 갖는 36개의 단위 트랜스듀서를 상정하고 이들의 배치 방식에 따른 타일형 프로젝터의 방사 특성을 일련의 음향-압전 연성 모사실험을 통하여 비교 분석한다.

키워드

타일형 프로젝터

단위 트랜스듀서 성능편차

방사 특성

배치 방식

References

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Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 35
No :6
Pages :436-444
Received Date : 2016-09-06
Revised Date : 2016-10-10
Accepted Date : 2016-11-25
DOI :https://doi.org/10.7776/ASK.2016.35.6.436

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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