NL42911C - - Google Patents
Info
- Publication number
- NL42911C NL42911C NL42911DA NL42911C NL 42911 C NL42911 C NL 42911C NL 42911D A NL42911D A NL 42911DA NL 42911 C NL42911 C NL 42911C
- Authority
- NL
- Netherlands
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
- 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
- H04R1/222—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only for microphones
-
- 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
- H04R1/342—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 for microphones
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US436508XA | 1934-06-09 | 1934-06-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL42911C true NL42911C (forum.php) |
Family
ID=21928200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL42911D NL42911C (forum.php) | 1934-06-09 |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR791874A (forum.php) |
| GB (1) | GB436508A (forum.php) |
| NL (1) | NL42911C (forum.php) |
-
0
- NL NL42911D patent/NL42911C/xx active
-
1935
- 1935-05-24 GB GB15129/35A patent/GB436508A/en not_active Expired
- 1935-06-05 FR FR791874D patent/FR791874A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR791874A (fr) | 1935-12-18 |
| GB436508A (en) | 1935-10-11 |