BE337525A - - Google Patents

Info

Publication number: BE337525A
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.)

1925-10-26

Publication of BE337525A publication Critical patent/BE337525A/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
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1008—Earpieces of the supra-aural or circum-aural type
- 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
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1058—Manufacture or assembly
- H04R1/1075—Mountings of transducers in earphones or headphones
- 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

Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Headphones And Earphones (AREA)

BE337525D 1925-10-26 BE337525A (xx)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR605038T		1925-10-26

Publications (1)

Publication Number	Publication Date
BE337525A true BE337525A (xx)

Family

ID=8973695

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE337525D BE337525A (xx)	1925-10-26

Country Status (3)

Country	Link
US (1)	US1784172A (xx)
BE (1)	BE337525A (xx)
FR (1)	FR605038A (xx)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2614646A (en) *		1952-10-21		Frequency receiving bell with an

0
- BE BE337525D patent/BE337525A/xx unknown
1925
- 1925-10-26 FR FR605038D patent/FR605038A/fr not_active Expired
1926
- 1926-10-11 US US140911A patent/US1784172A/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
US1784172A (en)	1930-12-09
FR605038A (fr)	1926-05-18

Publication	Publication Date	Title
AT108862B (xx)	1928-02-10
AT107490B (xx)	1927-10-10
BE331838A (xx)	1926-02-27
FR588637A (xx)	1925-05-12
FR28950E (xx)	1925-05-09
AT108860B (xx)	1928-02-10
AT108642B (xx)	1928-01-25
AT108864B (xx)	1928-02-10
FR593716A (xx)	1925-08-29
AT108056B (xx)	1927-11-25
AT99321B (xx)	1925-02-25
AT108975B (xx)	1928-02-25
BE329122A (xx)	1925-10-15
BE325119A (xx)	1925-06-19
BE330611A (xx)	1925-12-31
BE331135A (xx)	1925-12-31
BE247555A (xx)
BE331788A (xx)
BE256737A (xx)
BE254316A (xx)
NL20610C (xx)
BE252855A (xx)
BE249130A (xx)
BE248750A (xx)
BE331748A (xx)