WO2003017717A3 - Method and apparatus for reconstruction of soundwaves from digital signals - Google Patents

Method and apparatus for reconstruction of soundwaves from digital signals Download PDF

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Publication number
WO2003017717A3
WO2003017717A3 PCT/US2002/026290 US0226290W WO03017717A3 WO 2003017717 A3 WO2003017717 A3 WO 2003017717A3 US 0226290 W US0226290 W US 0226290W WO 03017717 A3 WO03017717 A3 WO 03017717A3
Authority
WO
WIPO (PCT)
Prior art keywords
speaklets
digital signal
clicks
generated
sound
Prior art date
Application number
PCT/US2002/026290
Other languages
French (fr)
Other versions
WO2003017717A2 (en
Inventor
Gabriel J Kaigham
John J Neumann Jr
Brett M Diamond
Original Assignee
Univ Carnegie Mellon
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 Univ Carnegie Mellon filed Critical Univ Carnegie Mellon
Priority to AU2002331624A priority Critical patent/AU2002331624A1/en
Publication of WO2003017717A2 publication Critical patent/WO2003017717A2/en
Publication of WO2003017717A3 publication Critical patent/WO2003017717A3/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/005—Details of transducers, loudspeakers or microphones using digitally weighted transducing elements

Abstract

Each of a plurality of speaklets (MEMS membranes) produces a stream of clicks (discrete pulses of acoustic energy) that are summed to generate the desired soundwave. The speaklets are selected to be energized based on the value of a digital signal. The greater the significance of the bit of the digital signal, the more speaklets that are energized in response to that bit. Thus, a time-varying sound level is generated by time-varying the number of speaklets emitting clicks. Louder sound is generated by increasing the number of speaklets emitting clicks. The present invention represents a substantial advance over the prior art in that sound is generated directly from a digital signal without the need to convert the digital signal first to an analog signal for driving a diaphragm.
PCT/US2002/026290 2001-08-17 2002-08-16 Method and apparatus for reconstruction of soundwaves from digital signals WO2003017717A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002331624A AU2002331624A1 (en) 2001-08-17 2002-08-16 Method and apparatus for reconstruction of soundwaves from digital signals

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US31337901P 2001-08-17 2001-08-17
US60/313,379 2001-08-17

Publications (2)

Publication Number Publication Date
WO2003017717A2 WO2003017717A2 (en) 2003-02-27
WO2003017717A3 true WO2003017717A3 (en) 2003-12-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/026290 WO2003017717A2 (en) 2001-08-17 2002-08-16 Method and apparatus for reconstruction of soundwaves from digital signals

Country Status (3)

Country Link
US (1) US7089069B2 (en)
AU (1) AU2002331624A1 (en)
WO (1) WO2003017717A2 (en)

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US8345895B2 (en) 2008-07-25 2013-01-01 United Microelectronics Corp. Diaphragm of MEMS electroacoustic transducer
WO2011070810A1 (en) 2009-12-09 2011-06-16 株式会社 Ｔｒｉｇｅｎｃｅ Ｓｅｍｉｃｏｎｄｕｃｔｏｒ Selection device
CN102239706B (en) * 2009-12-16 2016-08-17 株式会社特瑞君思半导体 Sound system
EP2643982B1 (en) 2010-11-26 2022-03-30 Audio Pixels Ltd. Apparatus for generating a target physical effect and method for manufacturing said apparatus
EP2856770B1 (en) 2012-05-25 2018-07-04 Audio Pixels Ltd. A system, a method and a computer program product for controlling a set of actuator elements
WO2013175476A1 (en) * 2012-05-25 2013-11-28 Audio Pixels Ltd. A system, a method and a computer program product for controlling a group of actuator arrays for producing a physical effect
DE102014217798A1 (en) 2014-09-05 2016-03-10 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Micromechanical piezoelectric actuators for realizing high forces and deflections
KR20170137810A (en) 2015-04-15 2017-12-13 오디오 픽셀즈 리미티드 Method and system for detecting at least the position of an object in space
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US10899605B2 (en) 2018-03-05 2021-01-26 Sharp Kabushiki Kaisha MEMS device and manipulation method for micro-objects
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Also Published As

Publication number Publication date
WO2003017717A2 (en) 2003-02-27
US7089069B2 (en) 2006-08-08
US20030044029A1 (en) 2003-03-06
AU2002331624A1 (en) 2003-03-03

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