DE171536C - - Google Patents
Info
- Publication number
- DE171536C DE171536C DENDAT171536D DE171536DA DE171536C DE 171536 C DE171536 C DE 171536C DE NDAT171536 D DENDAT171536 D DE NDAT171536D DE 171536D A DE171536D A DE 171536DA DE 171536 C DE171536 C DE 171536C
- Authority
- DE
- Germany
- Prior art keywords
- microphone
- membrane
- housing
- membranes
- sound waves
- 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.)
- Active
Links
- 239000012528 membrane Substances 0.000 claims description 32
- 230000035945 sensitivity Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 241000947840 Alteromonadales Species 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000003296 saliva Anatomy 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR341035T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE171536C true DE171536C (enrdf_load_stackoverflow) |
Family
ID=8891865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT171536D Active DE171536C (enrdf_load_stackoverflow) |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE171536C (enrdf_load_stackoverflow) |
| FR (2) | FR341035A (enrdf_load_stackoverflow) |
-
0
- DE DENDAT171536D patent/DE171536C/de active Active
- FR FR4645A patent/FR4645E/fr not_active Expired
-
1904
- 1904-03-08 FR FR341035A patent/FR341035A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR341035A (fr) | 1904-07-27 |
| FR4645E (fr) | 1905-09-02 |
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