FR499748A - Method and apparatus for telephonically transmitting speech - Google Patents
Method and apparatus for telephonically transmitting speechInfo
- Publication number
- FR499748A FR499748A FR499748A FR499748DA FR499748A FR 499748 A FR499748 A FR 499748A FR 499748 A FR499748 A FR 499748A FR 499748D A FR499748D A FR 499748DA FR 499748 A FR499748 A FR 499748A
- Authority
- FR
- France
- Prior art keywords
- transmitting speech
- telephonically
- telephonically transmitting
- speech
- transmitting
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
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
- H04R1/32—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
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB133365T |
Publications (1)
Publication Number | Publication Date |
---|---|
FR499748A true FR499748A (en) | 1920-02-20 |
Family
ID=10021074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR499748A Expired FR499748A (en) | 1918-07-05 | Method and apparatus for telephonically transmitting speech |
Country Status (3)
Country | Link |
---|---|
FR (1) | FR499748A (en) |
GB (1) | GB133365A (en) |
NL (1) | NL5854C (en) |
-
0
- GB GB133365D patent/GB133365A/en active Active
- NL NL5854D patent/NL5854C/xx active
-
1918
- 1918-07-05 FR FR499748A patent/FR499748A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB133365A (en) | |
NL5854C (en) |
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