NL17297C - - Google Patents
Info
- Publication number
- NL17297C NL17297C NL17297DA NL17297C NL 17297 C NL17297 C NL 17297C NL 17297D A NL17297D A NL 17297DA NL 17297 C NL17297 C NL 17297C
- 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
- H04R1/32—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
- H04R1/345—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 loudspeakers
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US631724XA | 1924-03-27 | 1924-03-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL17297C true NL17297C (xx) |
Family
ID=22047426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL17297D NL17297C (xx) | 1924-03-27 |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE631724C (xx) |
| NL (1) | NL17297C (xx) |
-
0
- NL NL17297D patent/NL17297C/xx active
-
1924
- 1924-12-11 DE DEJ25491D patent/DE631724C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE631724C (de) | 1936-06-25 |