CA2022002A1 - Acoustic apparatus - Google Patents

Acoustic apparatus

Info

Publication number
CA2022002A1
CA2022002A1 CA 2022002 CA2022002A CA2022002A1 CA 2022002 A1 CA2022002 A1 CA 2022002A1 CA 2022002 CA2022002 CA 2022002 CA 2022002 A CA2022002 A CA 2022002A CA 2022002 A1 CA2022002 A1 CA 2022002A1
Authority
CA
Canada
Prior art keywords
sounds
revolution
focus
ellipsoidal surface
heard
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.)
Granted
Application number
CA 2022002
Other languages
French (fr)
Other versions
CA2022002C (en
Inventor
Hiroshi Ono
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.)
GEN ENGINEERING Co Ltd
Original Assignee
Hiroshi Ono
Gen Engineering 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
Priority claimed from JP1202601A external-priority patent/JPH0832113B2/en
Priority claimed from JP1202602A external-priority patent/JP2542563B2/en
Priority claimed from JP2107441A external-priority patent/JPH046599A/en
Application filed by Hiroshi Ono, Gen Engineering Co., Ltd. filed Critical Hiroshi Ono
Publication of CA2022002A1 publication Critical patent/CA2022002A1/en
Application granted granted Critical
Publication of CA2022002C publication Critical patent/CA2022002C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Abstract

An acoustic apparatus adapted to be heard only by a specific person or persons in one space without being worn by the user as in the case of an earphone. Sounds issuing from the apparatus do not leak to the outside and are not affected by the surrounding noise. Basically, the apparatus is arranged such that a sound source is disposed in one focus of a reflector having an ellipsoidal surface of revolution, and sounds are heard at the other focus. To increase the number of specific hearers, if the central portion of the reflector is made into a non-ellipsoidal surface of revolution, or a cross section having an ellipsoidal surface of revolution is extended orthogonally to the cross section by a predetermined length, the range of the other focus expands. In addition, by arranging a plurality of reflectors, it is possible to hear different sounds within the effective areas of the respective reflectors without mutual interference of the sounds.
CA 2022002 1989-08-04 1990-07-26 Acoustic apparatus Expired - Fee Related CA2022002C (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP01-202602 1989-08-04
JP01-202601 1989-08-04
JP1202601A JPH0832113B2 (en) 1989-08-04 1989-08-04 Hearing aid
JP1202602A JP2542563B2 (en) 1989-08-04 1989-08-04 Audio equipment
JP02-107441 1990-04-25
JP2107441A JPH046599A (en) 1990-04-25 1990-04-25 Acoustic device

Publications (2)

Publication Number Publication Date
CA2022002A1 true CA2022002A1 (en) 1991-02-05
CA2022002C CA2022002C (en) 1999-10-05

Family

ID=27310975

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2022002 Expired - Fee Related CA2022002C (en) 1989-08-04 1990-07-26 Acoustic apparatus

Country Status (3)

Country Link
EP (1) EP0411671B1 (en)
CA (1) CA2022002C (en)
DE (1) DE69032304T2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10149058B2 (en) 2013-03-15 2018-12-04 Richard O'Polka Portable sound system
WO2014144968A1 (en) 2013-03-15 2014-09-18 O'polka Richard Portable sound system
WO2020230462A1 (en) 2019-05-13 2020-11-19 ソニー株式会社 Acoustic reflector, speaker unit, and chair
CN114991327B (en) * 2022-06-30 2023-04-14 中国矿业大学 Sound insulation and noise reduction device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1782801A (en) * 1929-02-16 1930-11-25 Baehn Frederick Radio loud-speaker
US2643727A (en) * 1950-01-31 1953-06-30 Elipson S A Sound transmitting device with an ellipsoidal reflector
DE2508494A1 (en) * 1975-02-27 1976-09-02 Hansrichard Dipl Phys D Schulz Focuser for electromagnetic or mechanical waves - for therapeutic local hyper therapy of human tissue with ultrasonic or microwaves
US4151584A (en) * 1977-03-14 1979-04-24 Electro Controls Inc. Light-collecting reflector
US4421200A (en) * 1981-12-16 1983-12-20 Ferralli Michael W Elliptically shaped transducer enclosure

Also Published As

Publication number Publication date
DE69032304D1 (en) 1998-06-18
CA2022002C (en) 1999-10-05
DE69032304T2 (en) 1999-02-04
EP0411671B1 (en) 1998-05-13
EP0411671A3 (en) 1991-10-09
EP0411671A2 (en) 1991-02-06

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed