US2203715A - Loud-speaker arrangement - Google Patents

Loud-speaker arrangement Download PDF

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Publication number
US2203715A
US2203715A US124998A US12499837A US2203715A US 2203715 A US2203715 A US 2203715A US 124998 A US124998 A US 124998A US 12499837 A US12499837 A US 12499837A US 2203715 A US2203715 A US 2203715A
Authority
US
United States
Prior art keywords
loud
speaker
diaphragm
sound
manner
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
US124998A
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English (en)
Inventor
Benecke Heinrich
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.)
Telefunken AG
Original Assignee
Telefunken AG
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 Telefunken AG filed Critical Telefunken AG
Application granted granted Critical
Publication of US2203715A publication Critical patent/US2203715A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H04R27/00—Public address systems
    • 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
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers

Definitions

  • the invention is concerned withthe decrease of too large a range for loud-speakers; particularly of the low frequencies; in other words the sound waves radiated by the loud-speaker should practically be audible for a certain distance only.
  • v k This may be accomplished in various manner. 'l'he range of the sound waves is limited in ac 26 ccrdance with the invention in especially suitable manner by causing the intentional production of strong interferences in a sound field produced by aloud-speaker. a This may, for instance, be accomplished in the 30 manner that with a loud-speaker.
  • the axis of the conical region wherein the sound waves are perceptible is preferably at right angles to the sur- 50 face to be covered.
  • a region is in ured around the sound source wherein the soundwaves are perceptible and which is surrounded shell-like by. a zone of extinction and whose. range is thus small relatively with respect 55 to the range of sound waves ordinarily in use.
  • a further conical region exists wherein sound waves are likewise perceptible. jHowever, this region cannot usually be utilized for the transmission.
  • Such a sound field may for instance be pro-
  • the diaphragm now is orientated with respect L curs inthe same instant. .one or several systems shall be designated hereinafter as a tem is used with a singlediaphragm But also several diaphragms may be provided, each of which is preferably driven s'eparately.and arranged in the manner that the one loud-speaker radiates in the one direction; the otherloudspeaker in the opposite direction.
  • FIG. 1 discloses a pair,of loud-speaker imits arranged to .produce a horizontal zoneof extinction in accordance with the invention
  • Fig. 2 is an explanatory diagram in'conne'ction with 1
  • Fig. 7 is a modification of Fig., 1 wherein the sound from a pair of loud speaker units is re.- diated in the same direction
  • Figs. 4 to 7 illustrate various modes of operation of a pair of loud-speaker units such as disclosed in'Flg. 1.
  • luthecmbodimentaccordingtol igi4,amast' I ll, set on thefground, has attached loud-speaker cred and with vertical axia'that is so that one 'arrang eat 62..
  • 'Thejaudience -w-n in the vicinity of are placed 1 -spea kem ll and 45.
  • housing 48 loud-speaker at-the-rfoot ot fire system are is edinthe manner that it may 1 then located sumciently iar away'from the centhe lengthened or shorten
  • 1 tralplaneot-thepush-pulltwmradiatorinordgri anfeasy way to adjust the distance between the to receive anundisturbed aoundileld.
  • 'lheWholoud-speakers The region of extinction starts 80 theris from the foot pointm the 'betweeh the two loud-speakers and and its -s'ystein.thenearerhetotherangeotex+ tlnction aroundthecentml plane This, is shown in schematic manner in'l'lg. 2.
  • ligudspeaker t 6 k attached to'amast which'in onthesrqund.
  • nstanc s meters, above the ground to be covwhen housing 4: 1 rotatably attached to mast 85 1 a sound field is obtained as shi'iwn fin Fig. 5. ,This furnishes the meansto avoid excessive sound" intensities at the loot point. e
  • the rotatable arrangement has the further advantage/that the field may-be adapted to localconditions.
  • An application therefor isf illustrated in-lj'ig. 6.
  • means or ac atingj osaid eud-speaker be mt add units in substantially opposite electrical phase the ma and in substantially like-acoustical; phase whereby there is produced a tan-shaped zone 01' extinction which surrounds the common axis or medwmm #1115 the a J and m tsot ojisingma temofflle per.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
US124998A 1936-02-18 1937-02-10 Loud-speaker arrangement Expired - Lifetime US2203715A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1936T0046445 DE690437C (de) 1936-02-18 1936-02-18 Schalles in einem bestimmten Raumteil
DE486038X 1936-07-04

Publications (1)

Publication Number Publication Date
US2203715A true US2203715A (en) 1940-06-11

Family

ID=25944490

Family Applications (1)

Application Number Title Priority Date Filing Date
US124998A Expired - Lifetime US2203715A (en) 1936-02-18 1937-02-10 Loud-speaker arrangement

Country Status (4)

Country Link
US (1) US2203715A (enrdf_load_stackoverflow)
DE (1) DE690437C (enrdf_load_stackoverflow)
GB (1) GB486038A (enrdf_load_stackoverflow)
NL (1) NL53688C (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3526718A (en) * 1967-04-17 1970-09-01 David L Beatty Portable speaker assembly for large areas
US4554531A (en) * 1982-12-27 1985-11-19 Biersach James E Omnidirectional siren
US4596034A (en) * 1981-01-02 1986-06-17 Moncrieff J Peter Sound reproduction system and method
US4882760A (en) * 1983-12-02 1989-11-21 Yee Raymond M Sound reproduction system
US4953223A (en) * 1988-09-08 1990-08-28 Householder George G Speaker mounting system
US7191022B1 (en) * 1997-10-23 2007-03-13 Matsushita Electric Industrial Co., Ltd. Public addressing system
US20080273722A1 (en) * 2007-05-04 2008-11-06 Aylward J Richard Directionally radiating sound in a vehicle
US20080273712A1 (en) * 2007-05-04 2008-11-06 Jahn Dmitri Eichfeld Directionally radiating sound in a vehicle
US20080273725A1 (en) * 2007-05-04 2008-11-06 Klaus Hartung System and method for directionally radiating sound
US20090284055A1 (en) * 2005-09-12 2009-11-19 Richard Aylward Seat electroacoustical transducing

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2544742A (en) * 1946-12-31 1951-03-13 Vibra Sonic Inc Cubic loud-speaker cabinet
DE970013C (de) * 1950-08-29 1958-08-14 Siemens Ag Einrichtung fuer Lautsprecher
DE969536C (de) * 1952-10-08 1958-06-12 Saba Gmbh Anordnung fuer Schallstrahler
FR2628924B1 (fr) * 1988-03-15 1991-08-30 Baranes Roger Enceintes acoustiques a directivites optimums adaptables en diffuseurs de son a cones deflecteurs
GB2269960B (en) * 1992-08-20 1996-03-27 Canon Audio Ltd Sound output system

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3526718A (en) * 1967-04-17 1970-09-01 David L Beatty Portable speaker assembly for large areas
US4596034A (en) * 1981-01-02 1986-06-17 Moncrieff J Peter Sound reproduction system and method
US4554531A (en) * 1982-12-27 1985-11-19 Biersach James E Omnidirectional siren
US4882760A (en) * 1983-12-02 1989-11-21 Yee Raymond M Sound reproduction system
US4953223A (en) * 1988-09-08 1990-08-28 Householder George G Speaker mounting system
US7191022B1 (en) * 1997-10-23 2007-03-13 Matsushita Electric Industrial Co., Ltd. Public addressing system
US20090284055A1 (en) * 2005-09-12 2009-11-19 Richard Aylward Seat electroacoustical transducing
US8045743B2 (en) 2005-09-12 2011-10-25 Bose Corporation Seat electroacoustical transducing
US20080273722A1 (en) * 2007-05-04 2008-11-06 Aylward J Richard Directionally radiating sound in a vehicle
US20080273725A1 (en) * 2007-05-04 2008-11-06 Klaus Hartung System and method for directionally radiating sound
US20080273712A1 (en) * 2007-05-04 2008-11-06 Jahn Dmitri Eichfeld Directionally radiating sound in a vehicle
US8325936B2 (en) 2007-05-04 2012-12-04 Bose Corporation Directionally radiating sound in a vehicle
US8724827B2 (en) 2007-05-04 2014-05-13 Bose Corporation System and method for directionally radiating sound
WO2009012497A1 (en) * 2007-07-19 2009-01-22 Bose Corporation System and method for directionally radiating sound

Also Published As

Publication number Publication date
DE690437C (de) 1940-04-25
NL53688C (enrdf_load_stackoverflow)
GB486038A (en) 1938-05-30

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