FR598346A - Improvements to speaker phone receivers - Google Patents
Improvements to speaker phone receiversInfo
- Publication number
- FR598346A FR598346A FR598346DA FR598346A FR 598346 A FR598346 A FR 598346A FR 598346D A FR598346D A FR 598346DA FR 598346 A FR598346 A FR 598346A
- Authority
- FR
- France
- Prior art keywords
- speaker phone
- phone receivers
- receivers
- speaker
- phone
- 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
- H04R1/32—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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB598346X | 1924-05-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR598346A true FR598346A (en) | 1925-12-14 |
Family
ID=10484495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR598346D Expired FR598346A (en) | 1924-05-26 | 1925-05-18 | Improvements to speaker phone receivers |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR598346A (en) |
-
1925
- 1925-05-18 FR FR598346D patent/FR598346A/en not_active Expired
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