BE698708A - - Google Patents
Info
- Publication number
- BE698708A BE698708A BE698708DA BE698708A BE 698708 A BE698708 A BE 698708A BE 698708D A BE698708D A BE 698708DA BE 698708 A BE698708 A BE 698708A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/40—Arrangements for obtaining a desired directivity characteristic
- H04R25/402—Arrangements for obtaining a desired directivity characteristic using contructional means
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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
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/38—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEW0041620 | 1966-05-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE698708A true BE698708A (en) | 1967-11-03 |
Family
ID=7602905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE698708D BE698708A (en) | 1966-05-20 | 1967-05-19 |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE698708A (en) |
| CH (1) | CH474199A (en) |
| DE (1) | DE1487565B2 (en) |
| ES (1) | ES340703A1 (en) |
| GB (1) | GB1181259A (en) |
| NL (1) | NL153060B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3770911A (en) * | 1972-07-21 | 1973-11-06 | Industrial Research Prod Inc | Hearing aid system |
| DE3921551A1 (en) * | 1989-06-30 | 1991-01-03 | Bosch Gmbh Robert | Housing for behind ear hearing aid - has frame defining two separate chambers for microphone and earpiece respectively |
| DE10260304B3 (en) * | 2002-12-20 | 2004-07-08 | Siemens Audiologische Technik Gmbh | Hearing aid system with side-specific hearing aid devices that can be worn behind the ears |
-
1966
- 1966-05-20 DE DE19661487565 patent/DE1487565B2/en active Pending
-
1967
- 1967-05-16 GB GB2261967A patent/GB1181259A/en not_active Expired
- 1967-05-17 CH CH691967A patent/CH474199A/en not_active IP Right Cessation
- 1967-05-18 ES ES340703A patent/ES340703A1/en not_active Expired
- 1967-05-19 BE BE698708D patent/BE698708A/xx unknown
- 1967-05-19 NL NL6706947A patent/NL153060B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1487565A1 (en) | 1969-02-06 |
| CH474199A (en) | 1969-06-15 |
| NL6706947A (en) | 1967-11-21 |
| GB1181259A (en) | 1970-02-11 |
| ES340703A1 (en) | 1968-06-16 |
| DE1487565B2 (en) | 1972-10-12 |
| NL153060B (en) | 1977-04-15 |