US2210477A - Loudspeaker arrangement - Google Patents

Loudspeaker arrangement Download PDF

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Publication number
US2210477A
US2210477A US240650A US24065038A US2210477A US 2210477 A US2210477 A US 2210477A US 240650 A US240650 A US 240650A US 24065038 A US24065038 A US 24065038A US 2210477 A US2210477 A US 2210477A
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US
United States
Prior art keywords
loudspeaker
ground
sound
diaphragm
loudspeaker arrangement
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
US240650A
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English (en)
Inventor
Benecke Heinrich
Bialk Leo
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Telefunken AG
Original Assignee
Telefunken AG
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Filing date
Publication date
Application filed by Telefunken AG filed Critical Telefunken AG
Application granted granted Critical
Publication of US2210477A publication Critical patent/US2210477A/en
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    • 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

Definitions

  • the loudspeaker mounted in some concealed place.
  • arrangements are made so that the sound issues from underneath the licor or ground.
  • the loudspeakers therefore are mounted below the floor or the ground.
  • the axis of the loudspeaker to the horizontal line is preferably inclined at an acute angle. This plan moreover oiers the advantage that the loudspeakers Will not be impaired in their operation by rain and splashing water and are protected against the entry of foreign bodies.
  • FIGs. 1, 2 and 3 show exemplified embodiments of the present invention.
  • Fitted into the ground is a box i in which is accommodated the loudspeaker 2.
  • the loudspeaker divides the box into two parts, care having to be taken so that the sound waves issuing from the front of the diaphragm will not have a chance to communicate With the wave given off from the posterior face thereof.
  • it is recommendable to drape the space posteriorly of the diaphragm, as known in the art, with felt 3 or by packing it with cotton or the like.
  • a drain hole 4 is provided for carrying off rain water.
  • the horn-like construction as shown oiers the advantage that the use of the device is made essentially independent of the acoustic properties of the posterior space, provided it is not of unduly limited dimensions. Owing to the fact that the loudspeaker is mounted in the enclosure a little distance away from the grating 5 part 6 of the top cover plate will protect the loudspeaker from soiling.
  • the loudspeaker arrangement ilush with the ground as shown in the drawing, it is also possible to place such loudspeaker into enclosures or casings having a tortoise-like cover raised but slightly above the ground of the kind serving for traic regulation in the streets.
  • the loudspeakers could also be set into bases which also are raised but little above the ground. This has the advantage that a listener cannot stand right on top of the speaker.
  • the loudspeaker is mounted so that its axis presents an inclination to the horizontal. It is, of course, also feasible to mount the loudspeaker so that its axis is parallel to the horizontal as shown in Fig. 2.
  • the reference numerals in Fig. 2 correspond to those in Fig. 1. But the arrangement Fig. 2 comprises additional sound duct walls or baliies 'l the eil'ect of which is that the sound radiated 01T from the loudspeaker 2 issues at an acute angle.
  • the loudspeaker axis could present any other angle in reference to the horizontal, provided that care is taken so that the acoustic waves radiated from the loudspeaker are made to issue at an acute angle to the horizontal, and this is done in the embodiment Fig. 2, where the axis is parallel, by the aid of baboards.
  • FIG. 3 Another embodiment of this invention is to install a mushroom type loudspeaker, that is, a loudspeaker with non-directional characteristic into the ground as shown in Fig. 3.
  • a mushroom type loudspeaker that is, a loudspeaker with non-directional characteristic into the ground as shown in Fig. 3.
  • the surface of the ground for instance, in the lawn of a parade ground or else in the floor of a room, is an opening lll adapted to accommodate the non-directional loudspeaker i l.
  • the mouth of the loudspeaker is covered by the mushroom-shaped inserted part l2; the outlet i3 for the sound is shut by means of a cover if! of truncated-cone shape and having sound apertures.
  • the mouth i3 itself is protected against the entrance of water, foreign bodies, etc., by means oi a screen i5.
  • the loudspeaker system is indicated at i6, and the diaphragm at il.
  • a flexible connectingk cable I8 is brought to the socket i@ which is preferably mounted iixed in the ground.
  • a drain hole 2Q is provided here just as in Figs. l and 2.
  • the drain holes in the embodiments Figs. 1 to 3 it is to be noted that it is recommendable to dispose the loudspeakers a few centimeters above these drain holes in order that the speaker may not be damaged by possibly occurring clogging of the drains.

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
US240650A 1937-11-10 1938-11-16 Loudspeaker arrangement Expired - Lifetime US2210477A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE207880X 1937-11-10

Publications (1)

Publication Number Publication Date
US2210477A true US2210477A (en) 1940-08-06

Family

ID=5793936

Family Applications (1)

Application Number Title Priority Date Filing Date
US240650A Expired - Lifetime US2210477A (en) 1937-11-10 1938-11-16 Loudspeaker arrangement

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US (1) US2210477A (US06653308-20031125-C00173.png)
BE (1) BE430974A (US06653308-20031125-C00173.png)
CH (1) CH207880A (US06653308-20031125-C00173.png)
GB (1) GB508458A (US06653308-20031125-C00173.png)
NL (1) NL52281C (US06653308-20031125-C00173.png)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2689016A (en) * 1953-04-14 1954-09-14 Henry C Lang Sound reproducing system
US3043912A (en) * 1957-07-10 1962-07-10 Laney William J De Intercom for automobiles
US3045064A (en) * 1959-06-01 1962-07-17 Margaret H Sellers Apparatus for transmitting sound from a baseball field
US3065816A (en) * 1958-03-10 1962-11-27 Rangertone Electronics Corp Stereophonic sound distributor
US3080012A (en) * 1958-09-26 1963-03-05 Columbia Broadcasting Syst Inc Stereophonic loudspeaker arrays
US3105113A (en) * 1960-07-15 1963-09-24 Rca Corp Stereophonic loudspeaker system
US3557324A (en) * 1967-04-28 1971-01-19 Yoshiro Nakamatsu Television receiver having means for causing sound to emanate from picture plane
US3590941A (en) * 1969-10-10 1971-07-06 Arvin Ind Inc Speaker enclosure
US3642091A (en) * 1968-10-09 1972-02-15 Pioneer Electronic Corp Underground acoustic device
US3674108A (en) * 1970-10-29 1972-07-04 David L Beatty Outdoor speaker enclosure
US3679023A (en) * 1968-08-06 1972-07-25 John C Rankin Loudspeaker enclosure
US3964571A (en) * 1975-04-01 1976-06-22 Peter Garland Snell Acoustic system
US4949386A (en) * 1988-05-23 1990-08-14 Hill Amel L Speaker system
US5033577A (en) * 1988-12-06 1991-07-23 Bose Corporation Room sound reproducing
US8873788B1 (en) * 2010-08-30 2014-10-28 Jeffery James Coombs In-ground audio sub woofer and method of installation
US10240796B1 (en) * 2016-05-20 2019-03-26 Beckwell Companies, LLC Fire pit insert assembly
US10484790B1 (en) * 2018-10-23 2019-11-19 Hyundai Motor Company Speaker device for vehicle
US10499128B2 (en) * 2018-04-20 2019-12-03 Sonos, Inc. Playback devices having waveguides with drainage features
EP4030781A4 (en) * 2019-09-13 2022-11-09 Panasonic Intellectual Property Management Co., Ltd. ACOUSTIC LENS AND SPEAKER SYSTEM

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0724439B2 (ja) * 1986-09-13 1995-03-15 シャープ株式会社 オ−デイオ装置
US5173942A (en) * 1986-09-13 1992-12-22 Sharp Kabushiki Kaisha Audio system operable in directional and non-directional modes

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2689016A (en) * 1953-04-14 1954-09-14 Henry C Lang Sound reproducing system
US3043912A (en) * 1957-07-10 1962-07-10 Laney William J De Intercom for automobiles
US3065816A (en) * 1958-03-10 1962-11-27 Rangertone Electronics Corp Stereophonic sound distributor
US3080012A (en) * 1958-09-26 1963-03-05 Columbia Broadcasting Syst Inc Stereophonic loudspeaker arrays
US3045064A (en) * 1959-06-01 1962-07-17 Margaret H Sellers Apparatus for transmitting sound from a baseball field
US3105113A (en) * 1960-07-15 1963-09-24 Rca Corp Stereophonic loudspeaker system
US3557324A (en) * 1967-04-28 1971-01-19 Yoshiro Nakamatsu Television receiver having means for causing sound to emanate from picture plane
US3679023A (en) * 1968-08-06 1972-07-25 John C Rankin Loudspeaker enclosure
US3642091A (en) * 1968-10-09 1972-02-15 Pioneer Electronic Corp Underground acoustic device
US3590941A (en) * 1969-10-10 1971-07-06 Arvin Ind Inc Speaker enclosure
US3674108A (en) * 1970-10-29 1972-07-04 David L Beatty Outdoor speaker enclosure
US3964571A (en) * 1975-04-01 1976-06-22 Peter Garland Snell Acoustic system
US4949386A (en) * 1988-05-23 1990-08-14 Hill Amel L Speaker system
US5033577A (en) * 1988-12-06 1991-07-23 Bose Corporation Room sound reproducing
US8873788B1 (en) * 2010-08-30 2014-10-28 Jeffery James Coombs In-ground audio sub woofer and method of installation
US10240796B1 (en) * 2016-05-20 2019-03-26 Beckwell Companies, LLC Fire pit insert assembly
US10499128B2 (en) * 2018-04-20 2019-12-03 Sonos, Inc. Playback devices having waveguides with drainage features
US10484790B1 (en) * 2018-10-23 2019-11-19 Hyundai Motor Company Speaker device for vehicle
KR20200045893A (ko) * 2018-10-23 2020-05-06 현대자동차주식회사 차량용 스피커장치
EP4030781A4 (en) * 2019-09-13 2022-11-09 Panasonic Intellectual Property Management Co., Ltd. ACOUSTIC LENS AND SPEAKER SYSTEM

Also Published As

Publication number Publication date
GB508458A (en) 1939-06-30
CH207880A (de) 1939-12-15
NL52281C (US06653308-20031125-C00173.png)
BE430974A (US06653308-20031125-C00173.png)

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