NL6502918A - - Google Patents
Info
- Publication number
- NL6502918A NL6502918A NL6502918A NL6502918A NL6502918A NL 6502918 A NL6502918 A NL 6502918A NL 6502918 A NL6502918 A NL 6502918A NL 6502918 A NL6502918 A NL 6502918A NL 6502918 A NL6502918 A NL 6502918A
- Authority
- NL
- Netherlands
Links
Classifications
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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
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/48—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using constructional means for obtaining a desired frequency response
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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
- H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only for telephonic receivers
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)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL6502918A NL6502918A (instruction) | 1965-03-08 | 1965-03-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL6502918A NL6502918A (instruction) | 1965-03-08 | 1965-03-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL6502918A true NL6502918A (instruction) | 1966-09-09 |
Family
ID=19792599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6502918A NL6502918A (instruction) | 1965-03-08 | 1965-03-08 |
Country Status (1)
| Country | Link |
|---|---|
| NL (1) | NL6502918A (instruction) |
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1965
- 1965-03-08 NL NL6502918A patent/NL6502918A/xx unknown