BR8901979A - Sistema de alto-falante - Google Patents

Sistema de alto-falante

Info

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

Application number

BR898901979A

Other languages

English (en)

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/ja

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

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/pt

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 Sistema de alto-falante BR8901979A (pt)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
JP63106355A JPH0775431B2 (ja)	1988-04-28	1988-04-28	スピーカシステム
JP63109343A JPH0775432B2 (ja)	1988-05-02	1988-05-02	スピーカシステム

Publications (1)

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

Family

ID=26446466

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BR898901979A BR8901979A (pt)	1988-04-28	1989-04-27	Sistema de alto-falante

Country Status (5)

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

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 (de) *	1996-03-27	1997-07-17	Henkel Kgaa	Verfahren zur Herstellung alkoxylierter Fettsäurealkylester
US6008391A (en) *	1997-03-17	1999-12-28	Henkel Kommanditgesellschaft Auf Aktien	Process for preparing alkoxylated fatty acid alkyl esters
DE19909272A1 (de)	1999-03-03	2000-09-07	Cognis Deutschland Gmbh	Verfahren zur Herstellung alkoxylierter nichtionischer Tenside
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 (zh) *	2022-12-27	2023-04-25	武汉轻工大学	共振吸声结构及制造方法

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 (de) *	1967-11-14	1969-12-18	Isophon Werke Gmbh	Trichterlautsprecheraggregat
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/es not_active Expired - Lifetime
- 1989-04-17 EP EP89106833A patent/EP0339425B1/fr not_active Expired - Lifetime
- 1989-04-26 MX MX015811A patent/MX171080B/es unknown
- 1989-04-27 BR BR898901979A patent/BR8901979A/pt not_active IP Right Cessation
- 1989-04-27 DK DK204589A patent/DK170195B1/da not_active IP Right Cessation

Also Published As

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

Publication	Publication Date	Title
BR8707625A (pt)	1989-10-03	Sistema de tele-enlace
IT1241540B (it)	1994-01-17	Sistema modulare di altoparlanti
DK26889D0 (da)	1989-01-20	Hoejtalersystem
DE69012911D1 (de)	1994-11-03	Lautsprechersystem.
NO175838C (no)	1994-12-14	Elektroakustisk system
DE68927036D1 (de)	1996-10-02	Toneffekt-System
DK313589A (da)	1989-12-31	Formastersystem
DE69027144D1 (de)	1996-07-04	Lautsprechersystem
BR9104729A (pt)	1992-06-23	Sistema de alarme salva-vidas
DE68928774D1 (de)	1998-09-17	Kamarasystem
BR8901979A (pt)	1989-12-05	Sistema de alto-falante
IT9020545A0 (it)	1990-06-05	sistema di connessione
BR8904402A (pt)	1990-04-17	Sistema de paineis de veneziana
BR8903477A (pt)	1990-03-06	Sistema de suspensao
LV5571A3 (lv)	1994-03-10	Akustiska sistema
ES2022061A4 (es)	1991-12-01	Sistema de apoyo
NO175117C (no)	1994-08-31	Deteksjonssystem
DK593889A (da)	1989-11-24	Elektroakustisk system
BR8701340A (pt)	1987-12-29	Sistema de alto-falante eletronico
IT1233058B (it)	1992-03-14	Sistema di sospensione
DK343889D0 (da)	1989-07-11	Hydrofonanlaeg eller -system
BR8800548A (pt)	1989-09-12	Sistema sonofletor nao-ressonante
LT2375B (lt)	1993-12-15	Sausinimo-drekinimo sistema
ES295421Y (es)	1989-04-16	Sistema de proyeccion de sonido
BR8704719A (pt)	1989-03-21	Sistema hidro-vacuo

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