JPH0576839B2 - - Google Patents

Info

Publication number
JPH0576839B2
JPH0576839B2 JP24513684A JP24513684A JPH0576839B2 JP H0576839 B2 JPH0576839 B2 JP H0576839B2 JP 24513684 A JP24513684 A JP 24513684A JP 24513684 A JP24513684 A JP 24513684A JP H0576839 B2 JPH0576839 B2 JP H0576839B2
Authority
JP
Japan
Prior art keywords
ultrasonic transducer
transducer array
acoustic filter
parametric
reflector
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
JP24513684A
Other languages
English (en)
Japanese (ja)
Other versions
JPS61123389A (ja
Inventor
Mikiro Iwasa
Tsuneo Tanaka
Yoichi Kimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP24513684A priority Critical patent/JPS61123389A/ja
Priority to US06/862,349 priority patent/US4823908A/en
Priority to DE19853590430 priority patent/DE3590430T1/de
Priority to PCT/JP1985/000469 priority patent/WO1986001670A1/ja
Publication of JPS61123389A publication Critical patent/JPS61123389A/ja
Publication of JPH0576839B2 publication Critical patent/JPH0576839B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R27/00—Public address systems
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/28—Sound-focusing or directing, e.g. scanning using reflection, e.g. parabolic reflectors
    • 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
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • 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
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2217/00—Details of magnetostrictive, piezoelectric, or electrostrictive transducers covered by H04R15/00 or H04R17/00 but not provided for in any of their subgroups
    • H04R2217/03—Parametric transducers where sound is generated or captured by the acoustic demodulation of amplitude modulated ultrasonic waves

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Circuit For Audible Band Transducer (AREA)
JP24513684A 1984-08-28 1984-11-20 パラメトリツクスピ−カ Granted JPS61123389A (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP24513684A JPS61123389A (ja) 1984-11-20 1984-11-20 パラメトリツクスピ−カ
US06/862,349 US4823908A (en) 1984-08-28 1985-08-26 Directional loudspeaker system
DE19853590430 DE3590430T1 (de) 1984-08-28 1985-08-26 Lautsprechersystem mit ausgeprägter Richtwirkung
PCT/JP1985/000469 WO1986001670A1 (en) 1984-08-28 1985-08-26 Directional speaker system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24513684A JPS61123389A (ja) 1984-11-20 1984-11-20 パラメトリツクスピ−カ

Publications (2)

Publication Number Publication Date
JPS61123389A JPS61123389A (ja) 1986-06-11
JPH0576839B2 true JPH0576839B2 (de) 1993-10-25

Family

ID=17129164

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24513684A Granted JPS61123389A (ja) 1984-08-28 1984-11-20 パラメトリツクスピ−カ

Country Status (1)

Country Link
JP (1) JPS61123389A (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3306517B2 (ja) * 1992-05-08 2002-07-24 日本酸素株式会社 空気液化分離装置及び方法
JP2005354473A (ja) * 2004-06-11 2005-12-22 Seiko Epson Corp 超音波トランスデューサ及びこれを用いた超音波スピーカ
JP4069904B2 (ja) 2004-06-21 2008-04-02 セイコーエプソン株式会社 超音波スピーカ、及びプロジェクタ
JP5103873B2 (ja) * 2005-12-07 2012-12-19 セイコーエプソン株式会社 静電型超音波トランスデューサの駆動制御方法、静電型超音波トランスデューサ、これを用いた超音波スピーカ、音声信号再生方法、超指向性音響システム及び表示装置
ITTO20090501A1 (it) * 2009-07-01 2011-01-02 Dipartimento Di Biolog Animale Ed Ecologia Cent Dispositivo ad elevata direttivita' per la riproduzione acustica di suoni
JP5659598B2 (ja) * 2010-07-23 2015-01-28 日本電気株式会社 発振装置
JP5527083B2 (ja) * 2010-07-23 2014-06-18 日本電気株式会社 発振装置
JP5664450B2 (ja) * 2011-05-11 2015-02-04 株式会社デンソー パラメトリックスピーカ

Also Published As

Publication number Publication date
JPS61123389A (ja) 1986-06-11

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