DE270399C - - Google Patents
Info
- Publication number
- DE270399C DE270399C DENDAT270399D DE270399DA DE270399C DE 270399 C DE270399 C DE 270399C DE NDAT270399 D DENDAT270399 D DE NDAT270399D DE 270399D A DE270399D A DE 270399DA DE 270399 C DE270399 C DE 270399C
- Authority
- DE
- Germany
- Prior art keywords
- chamber
- record
- attached
- double
- grain
- 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
- 239000010445 mica Substances 0.000 claims description 8
- 229910052618 mica group Inorganic materials 0.000 claims description 8
- 230000000414 obstructive effect Effects 0.000 claims 1
- 239000012528 membrane Substances 0.000 description 12
- 239000002184 metal Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 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
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
- H04R21/023—Microphones with more than one granular chamber
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE270399C true DE270399C (enrdf_load_stackoverflow) |
Family
ID=527149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT270399D Active DE270399C (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE270399C (enrdf_load_stackoverflow) |
-
0
- DE DENDAT270399D patent/DE270399C/de active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE68918332T2 (de) | Elektroakustischer Wandler und Lautsprecher. | |
| DE60203329T2 (de) | Magnetsystem für Lautsprecher | |
| DE270399C (enrdf_load_stackoverflow) | ||
| AT67368B (de) | Doppeltwirkendes Mikrophon. | |
| DE1120504B (de) | Schallaufnahme- bzw. Wiedergabegeraet | |
| DE69129737T2 (de) | Wandlerantrieb mit Biegungsmoment | |
| DE69307963T2 (de) | Tieffrequenz Unterwasserschallerreger mit Benutzung einer Seltenerdlegierung | |
| DE2410766C3 (de) | Stellvorrichtung mit einem Axial- Stellmotor, insbesondere zur Betätigung von Gasheizungsventilen | |
| DE3638727A1 (de) | Kompakter elektro-akustischer uebertrager | |
| DE306020C (enrdf_load_stackoverflow) | ||
| DE553987C (de) | Lautsprecher mit in dem Luftspalt zwischen den Polen parallel zu den wirksamen Polflaechen hin und her schwingendem Anker | |
| DE224846C (enrdf_load_stackoverflow) | ||
| DE3007991A1 (de) | Elektroakustischer wandler | |
| DE898763C (de) | Kohlekoernermikrofon | |
| AT120297B (de) | Akustische Einrichtung. | |
| DE581340C (de) | Koernermikrophon | |
| DE246432C (enrdf_load_stackoverflow) | ||
| AT105954B (de) | Elektrostatisches Telephon bzw. Mikrophon, insbesondere Lautsprecher. | |
| DE686460C (de) | Lautsprecher | |
| DE8328C (de) | Neuerungen an mikrophonischen Apparaten und Construction eines Höhrrohres für Aerzte und Schwerhörige | |
| DE822249C (de) | Kondensator-Mikrophon | |
| DE34722C (de) | Mikrophonischer Uebertrager | |
| DE584429C (de) | Elektrischer Tongeber | |
| DE425047C (de) | Lautsprechendes Telephon | |
| DE263071C (enrdf_load_stackoverflow) |