BR8901979A - SPEAKER SYSTEM - Google Patents

SPEAKER SYSTEM

Info

Publication number
BR8901979A
BR8901979A BR898901979A BR8901979A BR8901979A BR 8901979 A BR8901979 A BR 8901979A BR 898901979 A BR898901979 A BR 898901979A BR 8901979 A BR8901979 A BR 8901979A BR 8901979 A BR8901979 A BR 8901979A
Authority
BR
Brazil
Prior art keywords
speaker system
speaker
Prior art date
Application number
BR898901979A
Other languages
Portuguese (pt)
Inventor
Tadashi Tamura
Shuji 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 BR8901979A publication Critical patent/BR8901979A/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
BR898901979A 1988-04-28 1989-04-27 SPEAKER SYSTEM BR8901979A (en)

Applications Claiming Priority (2)

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

Publications (1)

Publication Number Publication Date
BR8901979A true BR8901979A (en) 1989-12-05

Family

ID=26446466

Family Applications (1)

Application Number Title Priority Date Filing Date
BR898901979A BR8901979A (en) 1988-04-28 1989-04-27 SPEAKER SYSTEM

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
GB2325586B (en) * 1995-03-14 1999-01-13 Matsushita Electric Ind Co Ltd Speaker system
GB2302231B (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
GB402600A (en) * 1931-11-27 1933-12-07 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
DK170195B1 (en) 1995-06-06
EP0339425B1 (en) 1994-03-23
EP0339425A3 (en) 1990-01-24
DK204589D0 (en) 1989-04-27
ES2050178T3 (en) 1994-05-16
EP0339425A2 (en) 1989-11-02
MX171080B (en) 1993-09-29
DK204589A (en) 1989-10-29

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Legal Events

Date Code Title Description
FB19 Grant procedure suspended (art. 19)
FF Decision: intention to grant
FG9A Patent or certificate of addition granted
B21A Expiry acc. art. 78, item i of ipl- expiry of the term of protection

Free format text: PATENTE EXTINTA EM 27/04/2009