FR572044A - Thermo-microphone à air - Google Patents
Thermo-microphone à airInfo
- Publication number
- FR572044A FR572044A FR572044DA FR572044A FR 572044 A FR572044 A FR 572044A FR 572044D A FR572044D A FR 572044DA FR 572044 A FR572044 A FR 572044A
- Authority
- FR
- France
- Prior art keywords
- microphone
- air thermo
- thermo
- air
- 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
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
- H04R23/002—Transducers other than those covered by groups H04R9/00 - H04R21/00 using electrothermic-effect transducer
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Glass Compositions (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Photoreceptors In Electrophotography (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB348524A GB233763A (en) | 1924-02-11 | 1924-02-11 | Improvements in microphones |
Publications (1)
Publication Number | Publication Date |
---|---|
FR572044A true FR572044A (fr) | 1924-05-28 |
Family
ID=9759203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR572044D Expired FR572044A (fr) | 1924-02-11 | 1923-10-18 | Thermo-microphone à air |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR572044A (fr) |
GB (2) | GB227173A (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2346757B (en) * | 1984-09-12 | 2001-02-21 | Raytheon Co | Transducer |
-
1923
- 1923-10-08 GB GB2499123A patent/GB227173A/en not_active Expired
- 1923-10-18 FR FR572044D patent/FR572044A/fr not_active Expired
-
1924
- 1924-02-11 GB GB348524A patent/GB233763A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB227173A (en) | 1925-01-08 |
GB233763A (en) | 1925-05-11 |
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