BE396402A - - Google Patents

Info

Publication number: BE396402A
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.)

1931-03-31

Publication of BE396402A publication Critical patent/BE396402A/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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/08—Microphones
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
- 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
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
- 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
- H04R1/222—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only for microphones
- 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
- H04R1/38—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 in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
- 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
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical 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
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones

Landscapes

Engineering & Computer Science (AREA)
Health & Medical Sciences (AREA)
Otolaryngology (AREA)
Physics & Mathematics (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Computer Networks & Wireless Communication (AREA)
General Physics & Mathematics (AREA)
Radar, Positioning & Navigation (AREA)
Remote Sensing (AREA)
Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Soundproofing, Sound Blocking, And Sound Damping (AREA)
Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

BE396402D 1931-03-31 BE396402A (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US526598A US1885001A (en)	1931-03-31	1931-03-31	Apparatus for converting sound vibrations into electrical variations
US612466A US1892645A (en)	1931-03-31	1932-05-20	Sound pick-up device

Publications (1)

Publication Number	Publication Date
BE396402A true BE396402A (de)

Family

ID=24097986

Family Applications (4)

Application Number	Title	Priority Date
BE396402D BE396402A (de)	1931-03-31
BE387520D BE387520A (de)	1931-03-31	1932-03-31
BE389811D BE389811A (de)	1931-03-31	1932-07-13
BE428292D BE428292A (de)	1931-03-31	1938-05-27

Family Applications After (3)

Application Number	Title	Priority Date
BE387520D BE387520A (de)	1931-03-31	1932-03-31
BE389811D BE389811A (de)	1931-03-31	1932-07-13
BE428292D BE428292A (de)	1931-03-31	1938-05-27

Country Status (6)

Country	Link
US (3)	US1885001A (de)
BE (4)	BE387520A (de)
DE (2)	DE607620C (de)
FR (1)	FR733929A (de)
GB (2)	GB386478A (de)
NL (1)	NL39328C (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2239503A (en) *	1938-08-05	1941-04-22	Rca Corp	Sound pickup apparatus
US2476396A (en) *	1939-12-28	1949-07-19	Rca Corp	Magnetic equalization of sensitivity in ribbon microphone assemblies
US2417927A (en) *	1943-03-22	1947-03-25	Automatic Elect Lab	Sound direction finder
GB611209A (en) *	1944-08-29	1948-10-27	Standard Telephones Cables Ltd	Improvements in or relating to microphones
US2544536A (en) *	1947-05-28	1951-03-06	Rca Corp	Microphone
US2552311A (en) *	1948-08-28	1951-05-08	Rca Corp	Ribbon support for high fidelity electroacoustical sound transducers
DE1047250B (de) *	1953-01-22	1958-12-24	Alexander Schaaf	Elektroakustischer Wandler (Mikrofon und Lautsprecher) mit einer nach dem elektrostatischen Prinzip arbeitenden Membran
EP1813132B1 (de) *	2004-10-21	2019-08-14	Shure Incorporated	Akustische bandwandleranordnungen
US7936894B2 (en) *	2004-12-23	2011-05-03	Motorola Mobility, Inc.	Multielement microphone
WO2015077099A1 (en) *	2013-11-21	2015-05-28	Ghaffari Mohsen	Tunable ribbon microphone
US9877110B2 (en)	2014-12-29	2018-01-23	Michael Patrick Timmins	Ribbon support system for electrodynamic microphone
US10573291B2 (en)	2016-12-09	2020-02-25	The Research Foundation For The State University Of New York	Acoustic metamaterial

0
- BE BE396402D patent/BE396402A/xx unknown
1931
- 1931-03-31 US US526598A patent/US1885001A/en not_active Expired - Lifetime
1932
- 1932-03-18 GB GB8158/32A patent/GB386478A/en not_active Expired
- 1932-03-21 FR FR733929D patent/FR733929A/fr not_active Expired
- 1932-03-31 BE BE387520D patent/BE387520A/xx unknown
- 1932-05-20 US US612466A patent/US1892645A/en not_active Expired - Lifetime
- 1932-07-13 BE BE389811D patent/BE389811A/xx unknown
1933
- 1933-04-04 US US66444133 patent/USRE19115E/en not_active Expired
- 1933-05-06 GB GB13251/33A patent/GB405497A/en not_active Expired
- 1933-05-17 NL NL65339A patent/NL39328C/xx active
- 1933-05-21 DE DER87990D patent/DE607620C/de not_active Expired
1936
- 1936-02-18 DE DER95527D patent/DE656210C/de not_active Expired
1938
- 1938-05-27 BE BE428292D patent/BE428292A/xx unknown

Also Published As

Publication number	Publication date
DE607620C (de)	1935-01-03
USRE19115E (en)	1934-03-13
DE656210C (de)	1938-01-31
GB405497A (en)	1934-02-08
BE389811A (de)	1932-08-31
NL39328C (de)	1936-11-16
GB386478A (en)	1933-01-19
US1885001A (en)	1932-10-25
BE428292A (de)	1938-08-31
US1892645A (en)	1932-12-27
FR733929A (fr)	1932-10-14
BE387520A (de)	1932-05-31

Publication	Publication Date	Title
FR742750A (de)	1933-03-14
FR742944A (de)	1933-03-18
BE377446A (de)	1931-03-31
BE376369A (de)
BE396402A (de)
BE376552A (de)
BE376494A (de)
BE376486A (de)
BE378413A (de)
NL36744C (de)
BE378350A (de)
BE378214A (de)
BE378198A (de)
BE378184A (de)
BE378058A (de)
BE378008A (de)
BE377995A (de)
BE377922A (de)
BE375720A (de)
BE377906A (de)
BE377797A (de)
BE375242A (de)
BE377748A (de)
BE377703A (de)
BE377673A (de)