SG129322A1 - Ultrasonic transducers and amplifiers for generating audio beams - Google Patents

Ultrasonic transducers and amplifiers for generating audio beams

Info

Publication number
SG129322A1
SG129322A1 SG200504910A SG200504910A SG129322A1 SG 129322 A1 SG129322 A1 SG 129322A1 SG 200504910 A SG200504910 A SG 200504910A SG 200504910 A SG200504910 A SG 200504910A SG 129322 A1 SG129322 A1 SG 129322A1
Authority
SG
Singapore
Prior art keywords
cells
amplifiers
ultrasonic transducers
generating audio
audio beams
Prior art date
Application number
SG200504910A
Inventor
Sun Xiaobing
Gao Peng
Kanzo Okada
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Priority to SG200504910A priority Critical patent/SG129322A1/en
Publication of SG129322A1 publication Critical patent/SG129322A1/en

Links

Landscapes

  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

New transducers are proposed, of the kind having an array of transducer cells for generating an ultrasonic beam, modulated with an audio frequency. The cells may be bipolar, with certain cells 21 connected to receive a driver signal with a first polarity and other cells 25 connected to receive the driver signal with the opposite polarity, so that the two sorts of cell radiate in anti-phase. Alternatively, the cells may be partitioned into sets, each set of cells receiving the driving signal amplified by a corresponding amplifier 32, with a corresponding real weighting value.
SG200504910A 2005-07-13 2005-07-13 Ultrasonic transducers and amplifiers for generating audio beams SG129322A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SG200504910A SG129322A1 (en) 2005-07-13 2005-07-13 Ultrasonic transducers and amplifiers for generating audio beams

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SG200504910A SG129322A1 (en) 2005-07-13 2005-07-13 Ultrasonic transducers and amplifiers for generating audio beams

Publications (1)

Publication Number Publication Date
SG129322A1 true SG129322A1 (en) 2007-02-26

Family

ID=38640138

Family Applications (1)

Application Number Title Priority Date Filing Date
SG200504910A SG129322A1 (en) 2005-07-13 2005-07-13 Ultrasonic transducers and amplifiers for generating audio beams

Country Status (1)

Country Link
SG (1) SG129322A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001033902A2 (en) * 1999-10-29 2001-05-10 American Technology Corporation Parametric loudspeaker with improved phase characteristics
US20010007591A1 (en) * 1999-04-27 2001-07-12 Pompei Frank Joseph Parametric audio system
WO2003019125A1 (en) * 2001-08-31 2003-03-06 Nanyang Techonological University Steering of directional sound beams
US6556687B1 (en) * 1998-02-23 2003-04-29 Nec Corporation Super-directional loudspeaker using ultrasonic wave
US20050041530A1 (en) * 2001-10-11 2005-02-24 Goudie Angus Gavin Signal processing device for acoustic transducer array

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6556687B1 (en) * 1998-02-23 2003-04-29 Nec Corporation Super-directional loudspeaker using ultrasonic wave
US20010007591A1 (en) * 1999-04-27 2001-07-12 Pompei Frank Joseph Parametric audio system
WO2001033902A2 (en) * 1999-10-29 2001-05-10 American Technology Corporation Parametric loudspeaker with improved phase characteristics
WO2003019125A1 (en) * 2001-08-31 2003-03-06 Nanyang Techonological University Steering of directional sound beams
US20050041530A1 (en) * 2001-10-11 2005-02-24 Goudie Angus Gavin Signal processing device for acoustic transducer array

Similar Documents

Publication Publication Date Title
WO2021108717A3 (en) Systems and methods for evaluating cas9-independent off-target editing of nucleic acids
CN101601594B (en) Excitation method of medical B-ultrasound front-end excitation device
EP2056621A3 (en) Speaker array system
TW200719580A (en) Filterless class D power amplifier
TW200500462A (en) Method for producing target substance by fermentation
EP1715717A4 (en) Mobile body with superdirectivity speaker
WO2005065408A3 (en) Component ultrasound transducer
WO2014076707A3 (en) Method and system for generation of sound fields
WO2008056309A3 (en) Ecg electrode contact quality measurement system
DE60217188D1 (en) COMPOSED POWER AMPLIFIER
CA2604480A1 (en) A digital amplitude modulation transmitter with pulse width modulating rf drive
CN101453679A (en) Parametric array loudspeaker, signal processing method thereof
WO2007050659A3 (en) Vibroacoustic sound therapeutic system and method
CN102172043A (en) Acoustic reproduction device
DE60307615D1 (en) CELL CULTURE MEDIUM
WO2009044916A1 (en) Speaker device
WO2008033528A3 (en) Therapeutic and diagnostic electrostrictor ultrasonic arrays
TW200719348A (en) Load-balnaced apparatus of memory
EP1677575A3 (en) Sound reproducing screen for an ultrasonic converting and reproducing method
WO2004047482A3 (en) A high intensity directional electroacoustic sound generating system for communications targeting
WO2003059005A3 (en) Digital loudspeaker system
SG129322A1 (en) Ultrasonic transducers and amplifiers for generating audio beams
WO2004102790A3 (en) Digital switching power amplifier
CN109743659A (en) A kind of voice microphone array and its control method
CN107484085A (en) A kind of audio directional transducer