DE115308C - - Google Patents
Info
- Publication number
- DE115308C DE115308C DENDAT115308D DE115308DA DE115308C DE 115308 C DE115308 C DE 115308C DE NDAT115308 D DENDAT115308 D DE NDAT115308D DE 115308D A DE115308D A DE 115308DA DE 115308 C DE115308 C DE 115308C
- Authority
- DE
- Germany
- Prior art keywords
- microphone
- sounds
- deaf
- telephone
- teacher
- 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
- 206010011878 Deafness Diseases 0.000 claims description 12
- 241000272201 Columbiformes Species 0.000 claims description 4
- 206010048865 Hypoacusis Diseases 0.000 claims description 3
- 239000004020 conductor Substances 0.000 description 27
- 210000001747 pupil Anatomy 0.000 description 5
- 210000003128 head Anatomy 0.000 description 4
- 210000000056 organ Anatomy 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/04—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception comprising pocket amplifiers
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Neurosurgery (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrically Operated Instructional Devices (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE115308C true DE115308C (enExample) |
Family
ID=384735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT115308D Active DE115308C (enExample) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE115308C (enExample) |
-
0
- DE DENDAT115308D patent/DE115308C/de active Active
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