DK21413C - Termisk Mikrofon. - Google Patents
Termisk Mikrofon.Info
- Publication number
- DK21413C DK21413C DK21413DA DK21413C DK 21413 C DK21413 C DK 21413C DK 21413D A DK21413D A DK 21413DA DK 21413 C DK21413 C DK 21413C
- Authority
- DK
- Denmark
- Prior art keywords
- microphone
- thermal
- thermal microphone
- Prior art date
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)
- Building Environments (AREA)
- Catching Or Destruction (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE191505838X | 1915-02-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
DK21413C true DK21413C (da) | 1916-08-07 |
Family
ID=32668494
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK21413D DK21413C (da) | 1915-02-11 | Termisk Mikrofon. |
Country Status (5)
Country | Link |
---|---|
US (1) | US1389242A (da) |
AT (1) | AT76294B (da) |
DK (1) | DK21413C (da) |
FR (1) | FR480858A (da) |
GB (2) | GB191505838A (da) |
-
0
- DK DK21413D patent/DK21413C/da active
-
1915
- 1915-04-19 GB GB191505838D patent/GB191505838A/en not_active Expired
- 1915-04-19 GB GB191505837D patent/GB191505837A/en not_active Expired
-
1916
- 1916-01-24 AT AT76294D patent/AT76294B/de active
- 1916-02-04 FR FR480858A patent/FR480858A/fr not_active Expired
- 1916-02-29 US US81235A patent/US1389242A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR480858A (fr) | 1916-10-04 |
US1389242A (en) | 1921-08-30 |
GB191505837A (en) | 1916-04-19 |
GB191505838A (en) | 1916-04-19 |
AT76294B (de) | 1919-04-25 |
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