NL7004267A - - Google Patents
Info
- Publication number
- NL7004267A NL7004267A NL7004267A NL7004267A NL7004267A NL 7004267 A NL7004267 A NL 7004267A NL 7004267 A NL7004267 A NL 7004267A NL 7004267 A NL7004267 A NL 7004267A NL 7004267 A NL7004267 A NL 7004267A
- Authority
- NL
- Netherlands
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
- H04R25/00—Electric hearing aids
- H04R25/40—Arrangements for obtaining a desired directivity characteristic
- H04R25/402—Arrangements for obtaining a desired directivity characteristic using contructional means
-
- 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
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Electric hearing aids
- H04R25/45—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback
- H04R25/456—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback mechanically
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- General Health & Medical Sciences (AREA)
- Neurosurgery (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19691938435 DE1938435B2 (de) | 1969-07-29 | 1969-07-29 | Hörgerät |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7004267A true NL7004267A (https=) | 1971-02-02 |
Family
ID=5741216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7004267A NL7004267A (https=) | 1969-07-29 | 1970-03-25 |
Country Status (6)
| Country | Link |
|---|---|
| CH (1) | CH532876A (https=) |
| DE (1) | DE1938435B2 (https=) |
| FR (1) | FR2053232B1 (https=) |
| GB (1) | GB1296137A (https=) |
| NL (1) | NL7004267A (https=) |
| SE (1) | SE370484B (https=) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT407815B (de) * | 1990-07-13 | 2001-06-25 | Viennatone Gmbh | Hörgerät |
| CH681411A5 (https=) * | 1991-02-20 | 1993-03-15 | Phonak Ag | |
| US5524056A (en) | 1993-04-13 | 1996-06-04 | Etymotic Research, Inc. | Hearing aid having plural microphones and a microphone switching system |
-
1969
- 1969-07-29 DE DE19691938435 patent/DE1938435B2/de active Pending
-
1970
- 1970-03-25 NL NL7004267A patent/NL7004267A/xx unknown
- 1970-04-03 SE SE458670A patent/SE370484B/xx unknown
- 1970-04-06 GB GB1296137D patent/GB1296137A/en not_active Expired
- 1970-06-26 FR FR7023907A patent/FR2053232B1/fr not_active Expired
- 1970-07-06 CH CH1016470A patent/CH532876A/de not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| SE370484B (https=) | 1974-10-14 |
| FR2053232A1 (https=) | 1971-04-16 |
| DE1938435A1 (de) | 1971-02-11 |
| DE1938435B2 (de) | 1974-05-02 |
| CH532876A (de) | 1973-01-15 |
| FR2053232B1 (https=) | 1976-09-24 |
| GB1296137A (https=) | 1972-11-15 |