DE90445C - - Google Patents
Info
- Publication number
- DE90445C DE90445C DENDAT90445D DE90445DA DE90445C DE 90445 C DE90445 C DE 90445C DE NDAT90445 D DENDAT90445 D DE NDAT90445D DE 90445D A DE90445D A DE 90445DA DE 90445 C DE90445 C DE 90445C
- Authority
- DE
- Germany
- Prior art keywords
- record
- under
- vibrations
- microphone
- 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
- 238000000034 method Methods 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000011156 evaluation Methods 0.000 claims 1
- 230000000284 resting Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 229910052697 platinum Inorganic materials 0.000 description 2
- 230000000750 progressive Effects 0.000 description 2
- 230000036633 rest Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 210000003284 Horns Anatomy 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000002349 favourable Effects 0.000 description 1
- 230000002045 lasting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001105 regulatory Effects 0.000 description 1
- 230000001429 stepping Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
- H04M15/28—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP with meter at substation or with calculation of charges at terminal
- H04M15/30—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP with meter at substation or with calculation of charges at terminal the meter or calculation of charges not being controlled from an exchange
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE90445C true DE90445C (xx) |
Family
ID=362164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT90445D Active DE90445C (xx) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE90445C (xx) |
-
0
- DE DENDAT90445D patent/DE90445C/de active Active
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