FR585593A - Improvements to furniture for wireless wave receiving devices - Google Patents
Improvements to furniture for wireless wave receiving devicesInfo
- Publication number
- FR585593A FR585593A FR585593DA FR585593A FR 585593 A FR585593 A FR 585593A FR 585593D A FR585593D A FR 585593DA FR 585593 A FR585593 A FR 585593A
- Authority
- FR
- France
- Prior art keywords
- furniture
- receiving devices
- wave receiving
- wireless wave
- wireless
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB585593X | 1923-03-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR585593A true FR585593A (en) | 1925-03-03 |
Family
ID=10481903
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR585593D Expired FR585593A (en) | 1923-03-20 | 1924-08-13 | Improvements to furniture for wireless wave receiving devices |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR585593A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE754291C (en) * | 1934-06-09 | 1952-10-20 | Electrical Res Prod Inc | Microphones and loudspeakers with directional characteristics |
DE2800471A1 (en) * | 1977-03-17 | 1978-09-21 | American Trading & Prod | FUNNEL SPEAKER |
-
1924
- 1924-08-13 FR FR585593D patent/FR585593A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE754291C (en) * | 1934-06-09 | 1952-10-20 | Electrical Res Prod Inc | Microphones and loudspeakers with directional characteristics |
DE2800471A1 (en) * | 1977-03-17 | 1978-09-21 | American Trading & Prod | FUNNEL SPEAKER |
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