GB690889A - Improvements in sound transmitting devices - Google Patents

Improvements in sound transmitting devices

Info

Publication number
GB690889A
GB690889A GB1774/51A GB177451A GB690889A GB 690889 A GB690889 A GB 690889A GB 1774/51 A GB1774/51 A GB 1774/51A GB 177451 A GB177451 A GB 177451A GB 690889 A GB690889 A GB 690889A
Authority
GB
United Kingdom
Prior art keywords
transmitting devices
ellipsoid
sound transmitting
sound
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
Application number
GB1774/51A
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.)
Multimoteur S A
Original Assignee
Multimoteur S A
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 Multimoteur S A filed Critical Multimoteur S A
Publication of GB690889A publication Critical patent/GB690889A/en
Expired 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

690,889. Acoustic reflectors. MULTIMOTEUR SOC. ANON. Jan. 23, 1951 [Jan. 31, 1950], No. 1774/51. Class 13. In a sound transmitter having a reflector 3 in the form of a portion of. an ellipsoid of revolution, the sound source e.g. a conical diaphragm 1 is at, one focus F of the ellipsoid, the other focus F<SP>1</SP> being outside the reflector 3, and the axis of the sound beam from the sound source is inclined to the principal axis of the ellipsoid.
GB1774/51A 1950-01-31 1951-01-23 Improvements in sound transmitting devices Expired GB690889A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR290349X 1950-01-31

Publications (1)

Publication Number Publication Date
GB690889A true GB690889A (en) 1953-04-29

Family

ID=8887650

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1774/51A Expired GB690889A (en) 1950-01-31 1951-01-23 Improvements in sound transmitting devices
GB15509/52A Expired GB719969A (en) 1950-01-31 1952-06-19 Improvements in sound transducers

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB15509/52A Expired GB719969A (en) 1950-01-31 1952-06-19 Improvements in sound transducers

Country Status (6)

Country Link
US (1) US2732907A (en)
CH (1) CH290349A (en)
DE (1) DE940357C (en)
FR (2) FR1012676A (en)
GB (2) GB690889A (en)
NL (1) NL84969C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3234501A (en) * 1962-05-07 1966-02-08 Gen Signal Corp Protective casing for ultrasonic transducers
US4564841A (en) * 1981-01-15 1986-01-14 Neidell Norman S Navigational systems using phase encoded angular coordinates

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1126928B (en) * 1959-11-20 1962-04-05 August Wilhelm Johan Va Albert Device for emitting sound waves
US3068955A (en) * 1959-11-27 1962-12-18 Albert A W J Van Hedel Device for the radiation of sound waves
US4357490A (en) * 1980-07-18 1982-11-02 Dickey Baron C High fidelity loudspeaker system for aurally simulating wide frequency range point source of sound
US4421200A (en) * 1981-12-16 1983-12-20 Ferralli Michael W Elliptically shaped transducer enclosure
US4997056A (en) * 1989-01-31 1991-03-05 Riley Michael D Ear-focused acoustic reflector
US5615176A (en) * 1995-12-20 1997-03-25 Lacarrubba; Emanuel Acoustic reflector
US6068080A (en) * 1998-04-13 2000-05-30 Lacarrubba; Emanuel Apparatus for the redistribution of acoustic energy
US6820718B2 (en) * 2002-10-04 2004-11-23 Lacarrubba Emanuel Acoustic reproduction device with improved directional characteristics
US20080123884A1 (en) * 2006-08-22 2008-05-29 David Donenfeld Passive hearing aid device
JP2010268018A (en) * 2009-05-12 2010-11-25 Sony Corp Speaker apparatus, and electronic apparatus
WO2013012384A1 (en) 2011-07-15 2013-01-24 Ekdahl Olle An acoustical signal generator using two transducers and a reflector with a non-flat contour
US10149058B2 (en) 2013-03-15 2018-12-04 Richard O'Polka Portable sound system
EP2971393A4 (en) 2013-03-15 2016-11-16 Richard O'polka Portable sound system
USD740784S1 (en) 2014-03-14 2015-10-13 Richard O'Polka Portable sound device
CN114667739A (en) * 2019-12-04 2022-06-24 索尼集团公司 Speaker system and sound output method
USD958119S1 (en) * 2021-08-17 2022-07-19 Shenzhen Xunweijia Technology Development Co., Ltd. Microphone stand

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1619981A (en) * 1923-03-14 1927-03-08 Sargeant P Knut Sound magnifier
US1786279A (en) * 1927-03-31 1930-12-23 Rca Corp Reflector
FR41374E (en) * 1931-08-17 1933-01-07 Improvements to sound amplifiers
US2005300A (en) * 1933-12-15 1935-06-18 Arthur M Pfalzer Baffle for loud speakers
US2239170A (en) * 1939-04-26 1941-04-22 Crosley Corp Radio apparatus
US2643727A (en) * 1950-01-31 1953-06-30 Elipson S A Sound transmitting device with an ellipsoidal reflector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3234501A (en) * 1962-05-07 1966-02-08 Gen Signal Corp Protective casing for ultrasonic transducers
US4564841A (en) * 1981-01-15 1986-01-14 Neidell Norman S Navigational systems using phase encoded angular coordinates

Also Published As

Publication number Publication date
US2732907A (en) 1956-01-31
CH290349A (en) 1953-04-30
DE940357C (en) 1956-03-15
FR1012676A (en) 1952-07-16
GB719969A (en) 1954-12-08
NL84969C (en)
FR61796E (en) 1955-05-17

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