A stepped-plate bi-frequency source for generating a difference frequency sound with a parametric array
SCIE
SCOPUS
- Title
- A stepped-plate bi-frequency source for generating a difference frequency sound with a parametric array
- Authors
- Je, Y; Lee, H; Park, J; Moon, W
- Date Issued
- 2010-06
- Publisher
- ACOUSTICAL SOC AMER AMER INST PHYSICS
- Abstract
- An ultrasonic radiator is developed to generate a difference frequency sound from two frequencies of ultrasound in air with a parametric array. A design method is proposed for an ultrasonic radiator capable of generating highly directive, high-amplitude ultrasonic sound beams at two different frequencies in air based on a modification of the stepped-plate ultrasonic radiator. The stepped-plate ultrasonic radiator was introduced by Gallego-Juarez [Ultrasonics 16, 267-271 (1978)] in their previous study and can effectively generate highly directive, large-amplitude ultrasonic sounds in air, but only at a single frequency. Because parametric array sources must be able to generate sounds at more than one frequency, a design modification is crucial to the application of a stepped-plate ultrasonic radiator as a parametric array source in air. The aforementioned method was employed to design a parametric radiator for use in air. A prototype of this design was constructed and tested to determine whether it could successfully generate a difference frequency sound with a parametric array. The results confirmed that the proposed single small-area transducer was suitable as a parametric radiator in air. (c) 2010 Acoustical Society of America. [DOI: 10.1121/1.3397445]
- Keywords
- acoustic parametric devices; acoustic radiators; ultrasonic transducer arrays; ultrasonic waves; MICROMACHINED ULTRASONIC TRANSDUCERS; AIR
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/25709
- DOI
- 10.1121/1.3397445
- ISSN
- 0001-4966
- Article Type
- Article
- Citation
- JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, vol. 127, no. 6, page. 3494 - 3502, 2010-06
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