FR377966A - Transmetteur téléphonique - Google Patents
Transmetteur téléphoniqueInfo
- Publication number
- FR377966A FR377966A FR377966DA FR377966A FR 377966 A FR377966 A FR 377966A FR 377966D A FR377966D A FR 377966DA FR 377966 A FR377966 A FR 377966A
- Authority
- FR
- France
- Prior art keywords
- telephone transmitter
- telephone
- transmitter
- 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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR377966T | 1907-05-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR377966A true FR377966A (fr) | 1907-09-20 |
Family
ID=1424349
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR377966D Expired FR377966A (fr) | 1907-05-18 | 1907-05-18 | Transmetteur téléphonique |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR377966A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2593012A1 (fr) * | 1986-01-16 | 1987-07-17 | Akg Akustische Kino Geraete | Recepteur a gradient de pression |
-
1907
- 1907-05-18 FR FR377966D patent/FR377966A/fr not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2593012A1 (fr) * | 1986-01-16 | 1987-07-17 | Akg Akustische Kino Geraete | Recepteur a gradient de pression |
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