BE487335A - - Google Patents

Info

Publication number: BE487335A
Authority: BE; Belgium

Application number

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.)

1949-02-14

Publication of BE487335A publication Critical patent/BE487335A/xx

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
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/2853—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line
- H04R1/2857—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line for loudspeaker transducers
- 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
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/2838—Enclosures comprising vibrating or resonating arrangements of the bandpass type
- H04R1/2842—Enclosures comprising vibrating or resonating arrangements of the bandpass type for loudspeaker transducers

BE487335D 1949-02-14 BE487335A (xx)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
BE683822X		1949-02-14

Publications (1)

Publication Number	Publication Date
BE487335A true BE487335A (xx)

Family

ID=3877841

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE487335D BE487335A (xx)	1949-02-14

Country Status (5)

Country	Link
BE (1)	BE487335A (xx)
FR (1)	FR1012303A (xx)
GB (1)	GB683822A (xx)
LU (1)	LU29932A1 (xx)
NL (1)	NL78413C (xx)

0
- LU LU29932D patent/LU29932A1/xx unknown
- BE BE487335D patent/BE487335A/xx unknown
- NL NL78413D patent/NL78413C/xx active
1950
- 1950-02-10 GB GB3448/50A patent/GB683822A/en not_active Expired
- 1950-02-10 FR FR1012303D patent/FR1012303A/fr not_active Expired

Also Published As

Publication number	Publication date
LU29932A1 (xx)
FR1012303A (fr)	1952-07-08
NL78413C (xx)
GB683822A (en)	1952-12-03

Publication	Publication Date	Title
AT166754B (xx)	1950-09-25
AT193848B (xx)	1957-12-10
NL89842C (xx)
BE494162A (xx)
NL78413C (xx)
BE457200A (xx)
BE480597A (xx)
BE480618A (xx)
BE482756A (xx)
BE476015A (xx)
BE483689A (xx)
BE485768A (xx)
BE485770A (xx)
SE135460C1 (xx)	1952-04-29
NL90802C (xx)
NL81385C (xx)	1956-05-15
NL80075C (xx)
NL73735C (xx)
NL73436C (xx)
NL68576C (xx)
NL66109C (xx)
BE519698A (xx)	1953-05-30
BE499054A (xx)
BE488341A (xx)
BE497694A (xx)