BE524124A - - Google Patents
Info
- Publication number
- BE524124A BE524124A BE524124DA BE524124A BE 524124 A BE524124 A BE 524124A BE 524124D A BE524124D A BE 524124DA BE 524124 A BE524124 A BE 524124A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/127—Non-planar diaphragms or cones dome-shaped
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/58—Anti-side-tone circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE321708X | 1952-11-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE524124A true BE524124A (https=) |
Family
ID=6162943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE524124D BE524124A (https=) | 1952-11-07 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE524124A (https=) |
| CH (1) | CH321708A (https=) |
| FR (1) | FR1086665A (https=) |
| NL (2) | NL86513C (https=) |
-
0
- BE BE524124D patent/BE524124A/xx unknown
- NL NLAANVRAGE7708198,B patent/NL182555B/xx unknown
- NL NL86513D patent/NL86513C/xx active
-
1953
- 1953-11-05 CH CH321708D patent/CH321708A/de unknown
- 1953-11-06 FR FR1086665D patent/FR1086665A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH321708A (de) | 1957-05-15 |
| FR1086665A (fr) | 1955-02-15 |
| NL86513C (https=) | |
| NL182555B (nl) |