NL270840A - - Google Patents
Info
- Publication number
- NL270840A NL270840A NL270840DA NL270840A NL 270840 A NL270840 A NL 270840A NL 270840D A NL270840D A NL 270840DA NL 270840 A NL270840 A NL 270840A
- Authority
- NL
- Netherlands
Links
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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB515660A GB942658A (en) | 1960-02-12 | 1960-02-12 | Improvements in or relating to electro-acoustic transducers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL270840A true NL270840A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Family
ID=9790738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL270840D NL270840A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1960-02-12 |
Country Status (4)
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1270115B (de) * | 1964-01-08 | 1968-06-12 | Standard Elektrik Lorenz Ag | Elektrodynamischer Wandler der Fernmeldetechnik, insbesondere dynamische Hoerkapsel |
| DE3007808A1 (de) * | 1980-02-29 | 1981-09-10 | Siemens AG, 1000 Berlin und 8000 München | Elektroakustischer wandler |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2684724A (en) * | 1948-10-01 | 1954-07-27 | Bell Telephone Labor Inc | Sound wave refractor |
| DE941674C (de) * | 1950-12-28 | 1956-03-22 | Siemens ß. Halske Aktiengesellschaft, Berlin und München | Lautsprecherkombination, bei der auf er Vorderseite und/oder auf der Rückseite der Membran ein akustisches Filter, vorzugsweise Tiefpaßfilter, für die Begrenzung des abgestrahlten Frequenzbereiches vorgesehen ist |
| DE1025452B (de) * | 1952-09-18 | 1958-03-06 | Standard Elektrik Ag | Elektroakustischer Wandler mit Helmholzreseonator |
| DE1762064U (de) * | 1957-12-20 | 1958-02-27 | Lab Wennebostel Dr Ing Sennhei | Mikrofon mit elektrodynamischem wandle. |
-
0
- NL NL270840D patent/NL270840A/xx unknown
- GB GB970986D patent/GB970986A/en active Active
-
1960
- 1960-02-12 GB GB515660A patent/GB942658A/en not_active Expired
-
1961
- 1961-02-08 SE SE128461A patent/SE310709B/xx unknown
- 1961-02-11 DE DEJ19417A patent/DE1160009B/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB942658A (en) | 1963-11-27 |
| DE1160009B (de) | 1963-12-27 |
| GB970986A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | |
| SE310709B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1969-05-12 |