Investigation of directional audio system based on ultrasonic modulation

Author

Li, Deke ; Huang, Dagui

Author_Institution

Sch. of Mechatron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2010

fDate

4-7 Aug. 2010

Firstpage

861

Lastpage

865

Abstract

In this paper the structure and basic principle of directional audio system and its realization process are analyzed. An audio signal processing module with digital signal processor as its core is designed. According to the theory of nonlinear self-demodulation, three kinds of signal processing methods including DSB, distortion compensation DSB and SSB are introduced. Finally the directivity of ultrasonic transducer array is analyzed and simulated, the result presents that directivity of the sound can be effectively improved by using array technique.

Keywords

acoustic signal processing; audio systems; ultrasonic transducer arrays; SSB; audio signal processing module; digital signal processor; directional audio system; distortion compensation DSB; nonlinear self demodulation; ultrasonic modulation; ultrasonic transducer array; Acoustics; Amplitude modulation; Arrays; Frequency modulation; Ultrasonic imaging; Ultrasonic transducers; DSP; directional audio; modulate; ultrasonic transducer;

fLanguage

English

Publisher

ieee

Conference_Titel

Mechatronics and Automation (ICMA), 2010 International Conference on

Conference_Location

Xi´an

ISSN

2152-7431

Print_ISBN

978-1-4244-5140-1

Electronic_ISBN

2152-7431

Type

conf

DOI

10.1109/ICMA.2010.5589011

Filename

5589011