FR2143715B3 - - Google Patents
Info
- Publication number
- FR2143715B3 FR2143715B3 FR7221508A FR7221508A FR2143715B3 FR 2143715 B3 FR2143715 B3 FR 2143715B3 FR 7221508 A FR7221508 A FR 7221508A FR 7221508 A FR7221508 A FR 7221508A FR 2143715 B3 FR2143715 B3 FR 2143715B3
- Authority
- FR
- France
- 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)
- Diaphragms For Electromechanical Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2569671 | 1971-06-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2143715A1 FR2143715A1 (fr) | 1973-02-09 |
| FR2143715B3 true FR2143715B3 (fr) | 1975-08-08 |
Family
ID=11217467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7221508A Expired FR2143715B3 (fr) | 1971-06-09 | 1972-06-09 |
Country Status (5)
| Country | Link |
|---|---|
| CH (1) | CH551124A (fr) |
| DE (1) | DE2228827C2 (fr) |
| ES (1) | ES181623Y (fr) |
| FR (1) | FR2143715B3 (fr) |
| NL (1) | NL7207928A (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1592246A (en) * | 1976-09-23 | 1981-07-01 | Isaac T P | Sound projection system |
| FR2495423B1 (fr) * | 1980-11-28 | 1989-11-10 | Topalian Daniel | Enceinte acoustique a pavillon double avant non replie, et caisson ferme arriere |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE522584A (fr) * | 1952-09-11 |
-
1972
- 1972-06-08 CH CH854172A patent/CH551124A/it not_active IP Right Cessation
- 1972-06-09 ES ES1972181623U patent/ES181623Y/es not_active Expired
- 1972-06-09 FR FR7221508A patent/FR2143715B3/fr not_active Expired
- 1972-06-09 DE DE19722228827 patent/DE2228827C2/de not_active Expired
- 1972-06-09 NL NL7207928A patent/NL7207928A/xx active Search and Examination
Also Published As
| Publication number | Publication date |
|---|---|
| DE2228827A1 (de) | 1973-01-25 |
| NL7207928A (fr) | 1972-12-12 |
| DE2228827C2 (de) | 1983-12-01 |
| FR2143715A1 (fr) | 1973-02-09 |
| CH551124A (it) | 1974-06-28 |
| ES181623Y (es) | 1974-03-16 |
| ES181623U (es) | 1973-04-01 |