DK204589A - SPEAKER SYSTEM - Google Patents

SPEAKER SYSTEM Download PDF

Info

Publication number
DK204589A
DK204589A DK204589A DK204589A DK204589A DK 204589 A DK204589 A DK 204589A DK 204589 A DK204589 A DK 204589A DK 204589 A DK204589 A DK 204589A DK 204589 A DK204589 A DK 204589A
Authority
DK
Denmark
Prior art keywords
acoustic path
sound
membrane
absorbent device
troughs
Prior art date
Application number
DK204589A
Other languages
Danish (da)
Other versions
DK170195B1 (en
DK204589D0 (en
Inventor
Tadashi Tamura
Sjuji Saiki
Kazue Sato
Original Assignee
Matsushita Electric Ind 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 JP63106355A external-priority patent/JPH0775431B2/en
Priority claimed from JP63109343A external-priority patent/JPH0775432B2/en
Application filed by Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Publication of DK204589D0 publication Critical patent/DK204589D0/en
Publication of DK204589A publication Critical patent/DK204589A/en
Application granted granted Critical
Publication of DK170195B1 publication Critical patent/DK170195B1/en

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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns
    • 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

Abstract

A loudspeaker installation is arranged with a loudspeaker unit 1 with a membrane and an acoustic path 5 which is situated on the front of the membrane to guide the sound waves which are emitted from the membrane. The acoustic path 5 is bordered by a sound-absorbent device 4. The space which contains the acoustic path 5 and the sound-absorbent device 4 is divided by a divider 6 which is placed in such a way that at least one part of the sound-absorbent device 4 is exposed to the acoustic path 5. By means of this arrangement resonance peaks and troughs are removed, which peaks and troughs are determined by the length of the acoustic path 5, so that flat sound pressure frequency characteristics can be achieved over a wide range of high frequency tones. <IMAGE>
DK204589A 1988-04-28 1989-04-27 Loudspeaker installation DK170195B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP10635588 1988-04-28
JP63106355A JPH0775431B2 (en) 1988-04-28 1988-04-28 Speaker system
JP63109343A JPH0775432B2 (en) 1988-05-02 1988-05-02 Speaker system
JP10934388 1988-05-02

Publications (3)

Publication Number Publication Date
DK204589D0 DK204589D0 (en) 1989-04-27
DK204589A true DK204589A (en) 1989-10-29
DK170195B1 DK170195B1 (en) 1995-06-06

Family

ID=26446466

Family Applications (1)

Application Number Title Priority Date Filing Date
DK204589A DK170195B1 (en) 1988-04-28 1989-04-27 Loudspeaker installation

Country Status (5)

Country Link
EP (1) EP0339425B1 (en)
BR (1) BR8901979A (en)
DK (1) DK170195B1 (en)
ES (1) ES2050178T3 (en)
MX (1) MX171080B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2302231B (en) * 1995-03-14 1999-01-13 Matsushita Electric Ind Co Ltd Speaker system
GB2325586B (en) * 1995-03-14 1999-01-13 Matsushita Electric Ind Co Ltd Speaker system
DE19611999C1 (en) * 1996-03-27 1997-07-17 Henkel Kgaa Alkoxylated fatty acid alkyl ester preparation useful e.g. in dishwashing
US6008391A (en) * 1997-03-17 1999-12-28 Henkel Kommanditgesellschaft Auf Aktien Process for preparing alkoxylated fatty acid alkyl esters
DE19909272A1 (en) 1999-03-03 2000-09-07 Cognis Deutschland Gmbh Process for the production of alkoxylated nonionic surfactants
GB2464512B (en) * 2008-10-16 2012-11-28 Instigate Media Ltd A sound source
US11310587B2 (en) 2019-10-08 2022-04-19 Bose Corporation Horn loudspeakers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB378286A (en) * 1931-11-27 1932-08-11 Harold Lister Kirke Improvements in or relating to loudspeakers
GB496504A (en) * 1937-06-25 1938-12-01 Murphy Radio Ltd Improvements in loud speakers
GB963853A (en) * 1961-12-29 1964-07-15 Wharfedale Wireless Works Ltd Loudspeakers
DE1537620A1 (en) * 1967-11-14 1969-12-18 Isophon Werke Gmbh Funnel loudspeaker assembly
NZ225001A (en) * 1987-06-16 1990-09-26 Matsushita Electric Ind Co Ltd Loudspeaker: reflected sound waves absorbed

Also Published As

Publication number Publication date
MX171080B (en) 1993-09-29
DK170195B1 (en) 1995-06-06
DK204589D0 (en) 1989-04-27
BR8901979A (en) 1989-12-05
EP0339425A3 (en) 1990-01-24
ES2050178T3 (en) 1994-05-16
EP0339425A2 (en) 1989-11-02
EP0339425B1 (en) 1994-03-23

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Legal Events

Date Code Title Description
B1 Patent granted (law 1993)
PBP Patent lapsed

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