BR8901979A - SPEAKER SYSTEM - Google Patents

SPEAKER SYSTEM

Info

Publication number: BR8901979A
Authority: BR; Brazil
Prior art keywords: speaker system; speaker
Prior art date: 1988-04-28

Application number

BR898901979A

Other languages

Portuguese (pt)

Inventor

Tadashi Tamura

Shuji Saiki

Kazue Sato

Original Assignee

Matsushita Electric Industrial 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.)

1988-04-28

Filing date

1989-04-27

Publication date

1989-12-05

1988-04-28 Priority claimed from JP63106355A external-priority patent/JPH0775431B2/en

1988-05-02 Priority claimed from JP63109343A external-priority patent/JPH0775432B2/en

1989-04-27 Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd

1989-12-05 Publication of BR8901979A publication Critical patent/BR8901979A/en

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

Landscapes

Health & Medical Sciences (AREA)
Otolaryngology (AREA)
Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

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 (8)

* 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 Industrial Co Ltd	Speaker system
GB2325586B (en) *	1995-03-14	1999-01-13	Matsushita Electric Industrial 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
CN116013236A (en) *	2022-12-27	2023-04-25	武汉轻工大学	Resonant sound-absorbing structure and manufacturing method

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 Industrial Co Ltd	Loudspeaker: reflected sound waves absorbed

1989
- 1989-04-17 ES ES89106833T patent/ES2050178T3/en not_active Expired - Lifetime
- 1989-04-17 EP EP89106833A patent/EP0339425B1/en not_active Expired - Lifetime
- 1989-04-26 MX MX015811A patent/MX171080B/en unknown
- 1989-04-27 BR BR898901979A patent/BR8901979A/en not_active IP Right Cessation
- 1989-04-27 DK DK204589A patent/DK170195B1/en not_active IP Right Cessation

Also Published As

Publication number	Publication date
DK170195B1 (en)	1995-06-06
ES2050178T3 (en)	1994-05-16
EP0339425A2 (en)	1989-11-02
DK204589D0 (en)	1989-04-27
EP0339425A3 (en)	1990-01-24
DK204589A (en)	1989-10-29
MX171080B (en)	1993-09-29
EP0339425B1 (en)	1994-03-23

Publication	Publication Date	Title
BR8707625A (en)	1989-10-03	TELE-LINK SYSTEM
IT1241540B (en)	1994-01-17	MODULAR SPEAKER SYSTEM
DK26889D0 (en)	1989-01-20	SPEAKER SYSTEM
DE69012911D1 (en)	1994-11-03	Speaker system.
NO175838C (en)	1994-12-14	Electroacoustic system
DE68927036D1 (en)	1996-10-02	Sound effect system
DK313589A (en)	1989-12-31	FORMASTER SYSTEM
DE69027144D1 (en)	1996-07-04	Speaker system
BR9104729A (en)	1992-06-23	LIFE-ALARM SYSTEM
DE68928774D1 (en)	1998-09-17	Kamara system
BR8901979A (en)	1989-12-05	SPEAKER SYSTEM
IT9020545A0 (en)	1990-06-05	connection system
BR8904402A (en)	1990-04-17	VENEZIAN PANEL SYSTEM
BR8903477A (en)	1990-03-06	SUSPENSION SYSTEM
LV5571A3 (en)	1994-03-10	Acoustic system
ES2022061A4 (en)	1991-12-01	SUPPORT SYSTEM
NO175117C (en)	1994-08-31	Detection System
DK593889A (en)	1989-11-24	ELECTROACUSTIC SYSTEM
BR8701340A (en)	1987-12-29	ELECTRONIC SPEAKER SYSTEM
IT1233058B (en)	1992-03-14	SUSPENSION SYSTEM
DK343889D0 (en)	1989-07-11	HYDROPHONE SYSTEM OR SYSTEM
BR8800548A (en)	1989-09-12	NON-RESONANT SOUNDFLOWER SYSTEM
LT2375B (en)	1993-12-15	DRAINING-DRYING SYSTEM
ES295421Y (en)	1989-04-16	SOUND PROJECTION SYSTEM
BR8704719A (en)	1989-03-21	HYDRO-VACUUM SYSTEM

Legal Events

Date	Code	Title	Description
1996-11-26	FB19	Grant procedure suspended (art. 19)
1997-05-27	FF	Decision: intention to grant
1998-07-28	FG9A	Patent or certificate of addition granted
2012-12-25	B21A	Patent or certificate of addition expired [chapter 21.1 patent gazette]	Free format text: PATENTE EXTINTA EM 27/04/2009